/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:36:35,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:36:35,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:36:35,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:36:35,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:36:35,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:36:35,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:36:35,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:36:35,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:36:35,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:36:35,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:36:35,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:36:35,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:36:35,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:36:35,865 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:36:35,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:36:35,866 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:36:35,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:36:35,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:36:35,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:36:35,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:36:35,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:36:35,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:36:35,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:36:35,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:36:35,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:36:35,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:36:35,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:36:35,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:36:35,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:36:35,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:36:35,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:36:35,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:36:35,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:36:35,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:36:35,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:36:35,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:36:35,869 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:36:35,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:36:35,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:36:36,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:36:36,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:36:36,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:36:36,205 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:36:36,207 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:36:36,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-06-12 20:36:36,208 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-06-12 20:36:36,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:36:36,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:36:36,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:36:36,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:36:36,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:36:36,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:36:36,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:36:36,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:36:36,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:36:36,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:36:36,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:36:36,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:36:36,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:36:36,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:36:36,353 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:36:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:36:36,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:36:36,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:36:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:36:36,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:36:36,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:36:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:36:36,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:36:36,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:36:36,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:36:36,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:36:36,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:36:36,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:36:36,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:36:36,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-12 20:36:36,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-12 20:36:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-12 20:36:36,356 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-12 20:36:36,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-12 20:36:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-12 20:36:36,357 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:36:36,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:36:36,586 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-12 20:36:36,587 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 20:36:36,588 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-12 20:36:36,588 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-12 20:36:36,588 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-12 20:36:36,589 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:36:36 BoogieIcfgContainer [2021-06-12 20:36:36,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:36:36,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:36:36,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:36:36,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:36:36,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/2) ... [2021-06-12 20:36:36,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7868346c and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:36:36, skipping insertion in model container [2021-06-12 20:36:36,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:36:36" (2/2) ... [2021-06-12 20:36:36,596 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-06-12 20:36:36,601 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:36:36,601 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:36:36,601 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:36:36,602 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:36:36,730 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-12 20:36:36,748 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:36:36,766 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,766 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,766 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,766 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,766 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,766 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,767 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,767 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork4======== [2021-06-12 20:36:36,777 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-12 20:36:36,822 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,838 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:36:36,839 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork4 was SAFE (1/5) [2021-06-12 20:36:36,841 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:36:36,843 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,843 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,843 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,844 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,844 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,844 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,844 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,844 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1======== [2021-06-12 20:36:36,846 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-12 20:36:36,864 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,873 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:36:36,873 INFO L301 ceAbstractionStarter]: Result for error location thread1 was SAFE (2/5) [2021-06-12 20:36:36,874 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:36:36,880 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,880 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,881 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,881 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,881 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,881 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,881 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,881 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork1======== [2021-06-12 20:36:36,883 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-12 20:36:36,899 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,902 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:36:36,903 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork1 was SAFE (3/5) [2021-06-12 20:36:36,903 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:36:36,914 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,915 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,915 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,915 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,916 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,916 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,916 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,916 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4======== [2021-06-12 20:36:36,917 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-12 20:36:36,936 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:36:36,941 INFO L301 ceAbstractionStarter]: Result for error location thread4 was SAFE (4/5) [2021-06-12 20:36:36,941 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:36:36,944 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,944 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,944 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,944 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,944 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,944 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,945 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:36:36,950 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-12 20:36:36,965 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:36:36,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:36,971 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:36,971 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:36,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-06-12 20:36:36,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:36,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466565521] [2021-06-12 20:36:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466565521] [2021-06-12 20:36:37,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466565521] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:37,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:37,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:36:37,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393323607] [2021-06-12 20:36:37,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:37,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:37,298 INFO L87 Difference]: Start difference. First operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:37,427 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2021-06-12 20:36:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:36:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,461 INFO L225 Difference]: With dead ends: 893 [2021-06-12 20:36:37,462 INFO L226 Difference]: Without dead ends: 874 [2021-06-12 20:36:37,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-12 20:36:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-06-12 20:36:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-06-12 20:36:37,567 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-06-12 20:36:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,568 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-06-12 20:36:37,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-06-12 20:36:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:36:37,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,576 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:37,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:36:37,582 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-06-12 20:36:37,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:37,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504091519] [2021-06-12 20:36:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504091519] [2021-06-12 20:36:37,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504091519] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:37,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:37,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:36:37,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521748149] [2021-06-12 20:36:37,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:37,715 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:37,807 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2021-06-12 20:36:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:37,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:36:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,814 INFO L225 Difference]: With dead ends: 872 [2021-06-12 20:36:37,814 INFO L226 Difference]: Without dead ends: 841 [2021-06-12 20:36:37,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-12 20:36:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-06-12 20:36:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-06-12 20:36:37,873 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-06-12 20:36:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,873 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-06-12 20:36:37,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-06-12 20:36:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:36:37,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,876 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:37,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:36:37,876 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-06-12 20:36:37,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:37,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797898253] [2021-06-12 20:36:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797898253] [2021-06-12 20:36:37,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797898253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:37,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030743074] [2021-06-12 20:36:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:36:38,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030743074] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:38,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 20:36:38,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-06-12 20:36:38,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105363227] [2021-06-12 20:36:38,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:36:38,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:36:38,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:38,161 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,217 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2021-06-12 20:36:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:36:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,226 INFO L225 Difference]: With dead ends: 867 [2021-06-12 20:36:38,226 INFO L226 Difference]: Without dead ends: 836 [2021-06-12 20:36:38,226 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-12 20:36:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-06-12 20:36:38,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-06-12 20:36:38,266 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-06-12 20:36:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,266 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-06-12 20:36:38,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-06-12 20:36:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:36:38,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,270 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 20:36:38,495 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,496 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-06-12 20:36:38,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319813311] [2021-06-12 20:36:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:38,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319813311] [2021-06-12 20:36:38,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319813311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:38,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112868816] [2021-06-12 20:36:38,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:38,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:38,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:38,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:36:38,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112868816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:38,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:38,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-12 20:36:38,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985652635] [2021-06-12 20:36:38,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:36:38,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:36:38,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:38,758 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,895 INFO L93 Difference]: Finished difference Result 1660 states and 6252 transitions. [2021-06-12 20:36:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:36:38,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:36:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,910 INFO L225 Difference]: With dead ends: 1660 [2021-06-12 20:36:38,910 INFO L226 Difference]: Without dead ends: 1532 [2021-06-12 20:36:38,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-06-12 20:36:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1029. [2021-06-12 20:36:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 4.135214007782102) internal successors, (4251), 1028 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4251 transitions. [2021-06-12 20:36:38,954 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4251 transitions. Word has length 27 [2021-06-12 20:36:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,955 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 4251 transitions. [2021-06-12 20:36:38,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4251 transitions. [2021-06-12 20:36:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:36:38,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,961 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:39,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:39,186 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash -700559147, now seen corresponding path program 3 times [2021-06-12 20:36:39,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:39,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698253187] [2021-06-12 20:36:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:39,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698253187] [2021-06-12 20:36:39,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698253187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:39,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28475418] [2021-06-12 20:36:39,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:36:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:36:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28475418] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:39,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 20:36:39,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-06-12 20:36:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39552261] [2021-06-12 20:36:39,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:39,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:39,373 INFO L87 Difference]: Start difference. First operand 1029 states and 4251 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:39,415 INFO L93 Difference]: Finished difference Result 1331 states and 5140 transitions. [2021-06-12 20:36:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:36:39,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:36:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:39,424 INFO L225 Difference]: With dead ends: 1331 [2021-06-12 20:36:39,424 INFO L226 Difference]: Without dead ends: 1250 [2021-06-12 20:36:39,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-12 20:36:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 954. [2021-06-12 20:36:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.074501573976915) internal successors, (3883), 953 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3883 transitions. [2021-06-12 20:36:39,459 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3883 transitions. Word has length 27 [2021-06-12 20:36:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:39,459 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3883 transitions. [2021-06-12 20:36:39,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3883 transitions. [2021-06-12 20:36:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:36:39,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:39,463 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:39,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:39,681 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash 96535007, now seen corresponding path program 1 times [2021-06-12 20:36:39,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:39,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839525935] [2021-06-12 20:36:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839525935] [2021-06-12 20:36:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839525935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036188813] [2021-06-12 20:36:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:36:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036188813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:39,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:39,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-12 20:36:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083904977] [2021-06-12 20:36:39,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:36:39,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:39,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:36:39,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:39,825 INFO L87 Difference]: Start difference. First operand 954 states and 3883 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:39,900 INFO L93 Difference]: Finished difference Result 1888 states and 7508 transitions. [2021-06-12 20:36:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:36:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:36:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:39,912 INFO L225 Difference]: With dead ends: 1888 [2021-06-12 20:36:39,912 INFO L226 Difference]: Without dead ends: 1828 [2021-06-12 20:36:39,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-12 20:36:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1443. [2021-06-12 20:36:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 4.125520110957004) internal successors, (5949), 1442 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5949 transitions. [2021-06-12 20:36:39,959 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5949 transitions. Word has length 27 [2021-06-12 20:36:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:39,959 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 5949 transitions. [2021-06-12 20:36:39,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5949 transitions. [2021-06-12 20:36:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:36:39,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:39,964 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:40,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:40,177 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-06-12 20:36:40,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:40,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527037118] [2021-06-12 20:36:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:40,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:40,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527037118] [2021-06-12 20:36:40,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527037118] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:40,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:40,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:36:40,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245835167] [2021-06-12 20:36:40,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:36:40,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:36:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:36:40,198 INFO L87 Difference]: Start difference. First operand 1443 states and 5949 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:40,230 INFO L93 Difference]: Finished difference Result 1479 states and 6007 transitions. [2021-06-12 20:36:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:36:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:40,240 INFO L225 Difference]: With dead ends: 1479 [2021-06-12 20:36:40,240 INFO L226 Difference]: Without dead ends: 1437 [2021-06-12 20:36:40,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-12 20:36:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1422. [2021-06-12 20:36:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 4.130190007037298) internal successors, (5869), 1421 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 5869 transitions. [2021-06-12 20:36:40,307 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 5869 transitions. Word has length 27 [2021-06-12 20:36:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:40,307 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 5869 transitions. [2021-06-12 20:36:40,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 5869 transitions. [2021-06-12 20:36:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:40,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:40,313 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:40,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:36:40,313 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1221830146, now seen corresponding path program 1 times [2021-06-12 20:36:40,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:40,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148814256] [2021-06-12 20:36:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:40,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148814256] [2021-06-12 20:36:40,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148814256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059483145] [2021-06-12 20:36:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:40,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 20:36:40,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:40,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:40,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:40,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-12 20:36:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:40,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059483145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:40,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:40,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:36:40,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962527653] [2021-06-12 20:36:40,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:40,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:40,843 INFO L87 Difference]: Start difference. First operand 1422 states and 5869 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:41,619 INFO L93 Difference]: Finished difference Result 1985 states and 8093 transitions. [2021-06-12 20:36:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:36:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:41,632 INFO L225 Difference]: With dead ends: 1985 [2021-06-12 20:36:41,632 INFO L226 Difference]: Without dead ends: 1966 [2021-06-12 20:36:41,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 615.6ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:36:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-06-12 20:36:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1519. [2021-06-12 20:36:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.118577075098814) internal successors, (6252), 1518 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6252 transitions. [2021-06-12 20:36:41,716 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6252 transitions. Word has length 29 [2021-06-12 20:36:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:41,716 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6252 transitions. [2021-06-12 20:36:41,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6252 transitions. [2021-06-12 20:36:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:41,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:41,722 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:41,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:41,937 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1456540984, now seen corresponding path program 2 times [2021-06-12 20:36:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:41,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212649856] [2021-06-12 20:36:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:42,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:42,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212649856] [2021-06-12 20:36:42,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212649856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:42,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307230256] [2021-06-12 20:36:42,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:42,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:42,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:42,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:42,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:42,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:36:42,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:42,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:42,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:42,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:36:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:42,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307230256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:42,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:42,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:36:42,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80223014] [2021-06-12 20:36:42,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:36:42,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:42,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:36:42,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:42,452 INFO L87 Difference]: Start difference. First operand 1519 states and 6252 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:42,890 INFO L93 Difference]: Finished difference Result 1822 states and 7414 transitions. [2021-06-12 20:36:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:36:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:42,902 INFO L225 Difference]: With dead ends: 1822 [2021-06-12 20:36:42,903 INFO L226 Difference]: Without dead ends: 1803 [2021-06-12 20:36:42,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-06-12 20:36:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1522. [2021-06-12 20:36:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 4.117028270874425) internal successors, (6262), 1521 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6262 transitions. [2021-06-12 20:36:42,951 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6262 transitions. Word has length 29 [2021-06-12 20:36:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:42,951 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6262 transitions. [2021-06-12 20:36:42,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6262 transitions. [2021-06-12 20:36:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:42,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:42,956 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:43,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:43,169 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2020138408, now seen corresponding path program 3 times [2021-06-12 20:36:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:43,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793494281] [2021-06-12 20:36:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:43,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:43,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793494281] [2021-06-12 20:36:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793494281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858688473] [2021-06-12 20:36:43,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:43,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:36:43,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:43,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:43,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:36:43,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:43,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:43,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:43,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:36:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:43,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858688473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:43,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:43,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:36:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348833369] [2021-06-12 20:36:43,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:36:43,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:36:43,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:43,644 INFO L87 Difference]: Start difference. First operand 1522 states and 6262 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:44,036 INFO L93 Difference]: Finished difference Result 1919 states and 7749 transitions. [2021-06-12 20:36:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:44,044 INFO L225 Difference]: With dead ends: 1919 [2021-06-12 20:36:44,044 INFO L226 Difference]: Without dead ends: 1900 [2021-06-12 20:36:44,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-06-12 20:36:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1529. [2021-06-12 20:36:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 4.111910994764398) internal successors, (6283), 1528 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 6283 transitions. [2021-06-12 20:36:44,089 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 6283 transitions. Word has length 29 [2021-06-12 20:36:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:44,089 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 6283 transitions. [2021-06-12 20:36:44,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 6283 transitions. [2021-06-12 20:36:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:44,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:44,094 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:44,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:36:44,314 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1903603882, now seen corresponding path program 4 times [2021-06-12 20:36:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:44,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265190192] [2021-06-12 20:36:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:44,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265190192] [2021-06-12 20:36:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265190192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372986066] [2021-06-12 20:36:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:44,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:44,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:44,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:44,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-12 20:36:44,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:44,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:44,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:44,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-12 20:36:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372986066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:44,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:36:44,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206222513] [2021-06-12 20:36:44,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:44,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:44,670 INFO L87 Difference]: Start difference. First operand 1529 states and 6283 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:45,406 INFO L93 Difference]: Finished difference Result 2650 states and 10619 transitions. [2021-06-12 20:36:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:36:45,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:45,416 INFO L225 Difference]: With dead ends: 2650 [2021-06-12 20:36:45,416 INFO L226 Difference]: Without dead ends: 2626 [2021-06-12 20:36:45,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:36:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-12 20:36:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1650. [2021-06-12 20:36:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.138872043662826) internal successors, (6825), 1649 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6825 transitions. [2021-06-12 20:36:45,469 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6825 transitions. Word has length 29 [2021-06-12 20:36:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:45,469 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 6825 transitions. [2021-06-12 20:36:45,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6825 transitions. [2021-06-12 20:36:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:45,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:45,494 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:45,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 20:36:45,713 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash 235210440, now seen corresponding path program 5 times [2021-06-12 20:36:45,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:45,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192846631] [2021-06-12 20:36:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:45,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:45,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192846631] [2021-06-12 20:36:45,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192846631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:45,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792321833] [2021-06-12 20:36:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:45,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:45,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:45,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-12 20:36:45,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:45,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:45,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:45,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-12 20:36:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:46,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792321833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:46,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:46,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:36:46,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323384594] [2021-06-12 20:36:46,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:46,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:46,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:46,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:46,075 INFO L87 Difference]: Start difference. First operand 1650 states and 6825 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:46,756 INFO L93 Difference]: Finished difference Result 2697 states and 10750 transitions. [2021-06-12 20:36:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:36:46,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:46,765 INFO L225 Difference]: With dead ends: 2697 [2021-06-12 20:36:46,766 INFO L226 Difference]: Without dead ends: 2648 [2021-06-12 20:36:46,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:36:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-12 20:36:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1614. [2021-06-12 20:36:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 4.145071295722257) internal successors, (6686), 1613 states have internal predecessors, (6686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 6686 transitions. [2021-06-12 20:36:46,813 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 6686 transitions. Word has length 29 [2021-06-12 20:36:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:46,813 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 6686 transitions. [2021-06-12 20:36:46,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 6686 transitions. [2021-06-12 20:36:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:46,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:46,818 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:47,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:47,033 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash -986184770, now seen corresponding path program 6 times [2021-06-12 20:36:47,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:47,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856232060] [2021-06-12 20:36:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:47,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856232060] [2021-06-12 20:36:47,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856232060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:47,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766416375] [2021-06-12 20:36:47,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:47,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:36:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:47,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:47,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-06-12 20:36:47,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:47,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:47,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:47,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-12 20:36:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:47,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766416375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:47,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:47,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:36:47,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580731720] [2021-06-12 20:36:47,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:36:47,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:47,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:36:47,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:36:47,443 INFO L87 Difference]: Start difference. First operand 1614 states and 6686 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:48,296 INFO L93 Difference]: Finished difference Result 2293 states and 9357 transitions. [2021-06-12 20:36:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:36:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:48,304 INFO L225 Difference]: With dead ends: 2293 [2021-06-12 20:36:48,304 INFO L226 Difference]: Without dead ends: 2274 [2021-06-12 20:36:48,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:36:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-06-12 20:36:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1602. [2021-06-12 20:36:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 4.147407870081199) internal successors, (6640), 1601 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6640 transitions. [2021-06-12 20:36:48,359 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6640 transitions. Word has length 29 [2021-06-12 20:36:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:48,360 INFO L482 AbstractCegarLoop]: Abstraction has 1602 states and 6640 transitions. [2021-06-12 20:36:48,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6640 transitions. [2021-06-12 20:36:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:48,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:48,364 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:48,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:48,577 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1050279366, now seen corresponding path program 7 times [2021-06-12 20:36:48,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:48,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976565130] [2021-06-12 20:36:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:48,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976565130] [2021-06-12 20:36:48,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976565130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924031552] [2021-06-12 20:36:48,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:48,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 20:36:48,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:48,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:48,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:48,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-12 20:36:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:48,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924031552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:48,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:48,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:36:48,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6850204] [2021-06-12 20:36:48,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:48,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:48,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:48,914 INFO L87 Difference]: Start difference. First operand 1602 states and 6640 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:49,502 INFO L93 Difference]: Finished difference Result 2048 states and 8428 transitions. [2021-06-12 20:36:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:36:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:49,509 INFO L225 Difference]: With dead ends: 2048 [2021-06-12 20:36:49,509 INFO L226 Difference]: Without dead ends: 2033 [2021-06-12 20:36:49,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:36:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-06-12 20:36:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1635. [2021-06-12 20:36:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 4.15483476132191) internal successors, (6789), 1634 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6789 transitions. [2021-06-12 20:36:49,547 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6789 transitions. Word has length 29 [2021-06-12 20:36:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:49,547 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 6789 transitions. [2021-06-12 20:36:49,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6789 transitions. [2021-06-12 20:36:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:49,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:49,551 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:49,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:36:49,773 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1403418856, now seen corresponding path program 8 times [2021-06-12 20:36:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:49,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735966340] [2021-06-12 20:36:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:49,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:49,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735966340] [2021-06-12 20:36:49,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735966340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:49,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065989090] [2021-06-12 20:36:49,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:49,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:49,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:49,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:36:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:36:50,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:50,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:50,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:50,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:21 [2021-06-12 20:36:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:50,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065989090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:50,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:50,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:36:50,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894522400] [2021-06-12 20:36:50,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:36:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:36:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:36:50,117 INFO L87 Difference]: Start difference. First operand 1635 states and 6789 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:50,898 INFO L93 Difference]: Finished difference Result 2546 states and 10245 transitions. [2021-06-12 20:36:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:36:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:50,904 INFO L225 Difference]: With dead ends: 2546 [2021-06-12 20:36:50,904 INFO L226 Difference]: Without dead ends: 2516 [2021-06-12 20:36:50,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:36:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-06-12 20:36:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1748. [2021-06-12 20:36:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 4.163136805953062) internal successors, (7273), 1747 states have internal predecessors, (7273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 7273 transitions. [2021-06-12 20:36:50,949 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 7273 transitions. Word has length 29 [2021-06-12 20:36:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:50,949 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 7273 transitions. [2021-06-12 20:36:50,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 7273 transitions. [2021-06-12 20:36:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:50,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:50,953 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:51,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:36:51,176 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1034313432, now seen corresponding path program 9 times [2021-06-12 20:36:51,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:51,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181305166] [2021-06-12 20:36:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:51,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:51,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181305166] [2021-06-12 20:36:51,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181305166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:51,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243921030] [2021-06-12 20:36:51,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:51,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:51,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:36:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:51,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:51,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:51,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:51,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:51,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:51,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-12 20:36:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:51,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243921030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:51,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:51,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:36:51,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256776346] [2021-06-12 20:36:51,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:36:51,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:36:51,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:51,532 INFO L87 Difference]: Start difference. First operand 1748 states and 7273 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:51,867 INFO L93 Difference]: Finished difference Result 2035 states and 8391 transitions. [2021-06-12 20:36:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:51,874 INFO L225 Difference]: With dead ends: 2035 [2021-06-12 20:36:51,874 INFO L226 Difference]: Without dead ends: 2021 [2021-06-12 20:36:51,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-12 20:36:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1745. [2021-06-12 20:36:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 4.164564220183486) internal successors, (7263), 1744 states have internal predecessors, (7263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 7263 transitions. [2021-06-12 20:36:51,921 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 7263 transitions. Word has length 29 [2021-06-12 20:36:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:51,921 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 7263 transitions. [2021-06-12 20:36:51,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 7263 transitions. [2021-06-12 20:36:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:51,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:51,925 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:52,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 20:36:52,147 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:52,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1148225234, now seen corresponding path program 10 times [2021-06-12 20:36:52,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:52,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733820338] [2021-06-12 20:36:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:52,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733820338] [2021-06-12 20:36:52,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733820338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599441903] [2021-06-12 20:36:52,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:52,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:52,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:52,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 20:36:52,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:52,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:52,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:52,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-12 20:36:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:52,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599441903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:52,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:52,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:36:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529334656] [2021-06-12 20:36:52,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:52,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:52,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:52,489 INFO L87 Difference]: Start difference. First operand 1745 states and 7263 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:53,028 INFO L93 Difference]: Finished difference Result 2564 states and 10283 transitions. [2021-06-12 20:36:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:36:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:53,033 INFO L225 Difference]: With dead ends: 2564 [2021-06-12 20:36:53,033 INFO L226 Difference]: Without dead ends: 2519 [2021-06-12 20:36:53,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:36:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-12 20:36:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1747. [2021-06-12 20:36:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 4.18213058419244) internal successors, (7302), 1746 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 7302 transitions. [2021-06-12 20:36:53,073 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 7302 transitions. Word has length 29 [2021-06-12 20:36:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:53,073 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 7302 transitions. [2021-06-12 20:36:53,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 7302 transitions. [2021-06-12 20:36:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:53,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:53,098 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:53,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:53,313 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1678080530, now seen corresponding path program 11 times [2021-06-12 20:36:53,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:53,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587041913] [2021-06-12 20:36:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:53,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587041913] [2021-06-12 20:36:53,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587041913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412287588] [2021-06-12 20:36:53,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:53,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:36:53,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 20:36:53,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:53,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:53,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:53,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-12 20:36:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:53,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412287588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:53,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:53,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:36:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474254561] [2021-06-12 20:36:53,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:53,685 INFO L87 Difference]: Start difference. First operand 1747 states and 7302 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:54,386 INFO L93 Difference]: Finished difference Result 2798 states and 11434 transitions. [2021-06-12 20:36:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:36:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:54,392 INFO L225 Difference]: With dead ends: 2798 [2021-06-12 20:36:54,392 INFO L226 Difference]: Without dead ends: 2768 [2021-06-12 20:36:54,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:36:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-06-12 20:36:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1923. [2021-06-12 20:36:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 4.209677419354839) internal successors, (8091), 1922 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 8091 transitions. [2021-06-12 20:36:54,435 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 8091 transitions. Word has length 29 [2021-06-12 20:36:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:54,435 INFO L482 AbstractCegarLoop]: Abstraction has 1923 states and 8091 transitions. [2021-06-12 20:36:54,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 8091 transitions. [2021-06-12 20:36:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:54,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:54,440 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:54,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:36:54,661 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash -179154478, now seen corresponding path program 12 times [2021-06-12 20:36:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:54,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790596961] [2021-06-12 20:36:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:54,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:54,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790596961] [2021-06-12 20:36:54,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790596961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:54,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220059168] [2021-06-12 20:36:54,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:54,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:36:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:36:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:54,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:54,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:54,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:54,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:54,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:54,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:55,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220059168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:55,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:55,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:36:55,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164900565] [2021-06-12 20:36:55,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:36:55,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:55,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:36:55,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:55,010 INFO L87 Difference]: Start difference. First operand 1923 states and 8091 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:55,697 INFO L93 Difference]: Finished difference Result 2469 states and 10170 transitions. [2021-06-12 20:36:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:36:55,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:55,702 INFO L225 Difference]: With dead ends: 2469 [2021-06-12 20:36:55,703 INFO L226 Difference]: Without dead ends: 2455 [2021-06-12 20:36:55,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:36:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-12 20:36:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1916. [2021-06-12 20:36:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 4.212532637075718) internal successors, (8067), 1915 states have internal predecessors, (8067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 8067 transitions. [2021-06-12 20:36:55,743 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 8067 transitions. Word has length 29 [2021-06-12 20:36:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:55,743 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 8067 transitions. [2021-06-12 20:36:55,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 8067 transitions. [2021-06-12 20:36:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:55,748 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:55,748 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:55,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:55,961 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1437329684, now seen corresponding path program 13 times [2021-06-12 20:36:55,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:55,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565223832] [2021-06-12 20:36:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:56,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565223832] [2021-06-12 20:36:56,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565223832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327925421] [2021-06-12 20:36:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:56,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:56,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:56,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 20:36:56,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:56,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:56,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:56,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-12 20:36:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:56,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327925421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:56,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:56,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:36:56,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755615646] [2021-06-12 20:36:56,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:56,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:56,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:56,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:56,266 INFO L87 Difference]: Start difference. First operand 1916 states and 8067 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:56,851 INFO L93 Difference]: Finished difference Result 2797 states and 11216 transitions. [2021-06-12 20:36:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:36:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:56,857 INFO L225 Difference]: With dead ends: 2797 [2021-06-12 20:36:56,858 INFO L226 Difference]: Without dead ends: 2755 [2021-06-12 20:36:56,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:36:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-06-12 20:36:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1875. [2021-06-12 20:36:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 4.218783351120598) internal successors, (7906), 1874 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 7906 transitions. [2021-06-12 20:36:56,898 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 7906 transitions. Word has length 29 [2021-06-12 20:36:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:56,898 INFO L482 AbstractCegarLoop]: Abstraction has 1875 states and 7906 transitions. [2021-06-12 20:36:56,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 7906 transitions. [2021-06-12 20:36:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:56,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:56,903 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:57,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:57,109 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1021452718, now seen corresponding path program 14 times [2021-06-12 20:36:57,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:57,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438289599] [2021-06-12 20:36:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:57,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:57,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438289599] [2021-06-12 20:36:57,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438289599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:57,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218512313] [2021-06-12 20:36:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:57,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:57,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:57,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:57,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:57,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:57,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:57,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:57,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:57,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218512313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:57,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:57,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:36:57,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135241112] [2021-06-12 20:36:57,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:36:57,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:36:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:57,475 INFO L87 Difference]: Start difference. First operand 1875 states and 7906 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:57,762 INFO L93 Difference]: Finished difference Result 2030 states and 8484 transitions. [2021-06-12 20:36:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:36:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:57,766 INFO L225 Difference]: With dead ends: 2030 [2021-06-12 20:36:57,766 INFO L226 Difference]: Without dead ends: 2011 [2021-06-12 20:36:57,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-12 20:36:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1860. [2021-06-12 20:36:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 4.2210866057019905) internal successors, (7847), 1859 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 7847 transitions. [2021-06-12 20:36:57,791 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 7847 transitions. Word has length 29 [2021-06-12 20:36:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:57,791 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 7847 transitions. [2021-06-12 20:36:57,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 7847 transitions. [2021-06-12 20:36:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:57,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:57,795 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:58,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 20:36:58,000 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash 312359488, now seen corresponding path program 1 times [2021-06-12 20:36:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:58,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075676792] [2021-06-12 20:36:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:58,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:58,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075676792] [2021-06-12 20:36:58,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075676792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:58,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241190875] [2021-06-12 20:36:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:58,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:58,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:58,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:58,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:58,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:36:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:58,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241190875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:58,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:58,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 20:36:58,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199663421] [2021-06-12 20:36:58,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:58,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:58,274 INFO L87 Difference]: Start difference. First operand 1860 states and 7847 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:58,416 INFO L93 Difference]: Finished difference Result 2474 states and 10275 transitions. [2021-06-12 20:36:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:36:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:58,421 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 20:36:58,421 INFO L226 Difference]: Without dead ends: 2455 [2021-06-12 20:36:58,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-12 20:36:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1974. [2021-06-12 20:36:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 4.227572225038013) internal successors, (8341), 1973 states have internal predecessors, (8341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 8341 transitions. [2021-06-12 20:36:58,450 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 8341 transitions. Word has length 29 [2021-06-12 20:36:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:58,450 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 8341 transitions. [2021-06-12 20:36:58,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 8341 transitions. [2021-06-12 20:36:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:58,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:58,455 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:58,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:58,663 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1734714314, now seen corresponding path program 2 times [2021-06-12 20:36:58,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:58,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754851235] [2021-06-12 20:36:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:58,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754851235] [2021-06-12 20:36:58,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754851235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402808746] [2021-06-12 20:36:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:58,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:58,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:36:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:58,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:58,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:58,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:58,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:58,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:58,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:59,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402808746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:59,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:59,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-12 20:36:59,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552544114] [2021-06-12 20:36:59,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:36:59,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:59,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:36:59,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:59,082 INFO L87 Difference]: Start difference. First operand 1974 states and 8341 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:59,596 INFO L93 Difference]: Finished difference Result 2637 states and 10901 transitions. [2021-06-12 20:36:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:36:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:36:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:59,602 INFO L225 Difference]: With dead ends: 2637 [2021-06-12 20:36:59,602 INFO L226 Difference]: Without dead ends: 2606 [2021-06-12 20:36:59,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:36:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-12 20:36:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1919. [2021-06-12 20:36:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.238269030239834) internal successors, (8129), 1918 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8129 transitions. [2021-06-12 20:36:59,632 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8129 transitions. Word has length 29 [2021-06-12 20:36:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:59,632 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8129 transitions. [2021-06-12 20:36:59,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8129 transitions. [2021-06-12 20:36:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:36:59,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:59,636 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:59,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:36:59,836 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1773592538, now seen corresponding path program 3 times [2021-06-12 20:36:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:59,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474585654] [2021-06-12 20:36:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:59,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:59,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474585654] [2021-06-12 20:36:59,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474585654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:59,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696960064] [2021-06-12 20:36:59,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:59,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:59,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:59,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:36:59,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:00,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:00,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:00,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:00,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:00,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-12 20:37:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:00,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696960064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:00,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:00,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:37:00,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642186302] [2021-06-12 20:37:00,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:00,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:00,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:00,153 INFO L87 Difference]: Start difference. First operand 1919 states and 8129 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:00,720 INFO L93 Difference]: Finished difference Result 2442 states and 10230 transitions. [2021-06-12 20:37:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:00,725 INFO L225 Difference]: With dead ends: 2442 [2021-06-12 20:37:00,725 INFO L226 Difference]: Without dead ends: 2427 [2021-06-12 20:37:00,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:37:00,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-12 20:37:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1904. [2021-06-12 20:37:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 4.242249080399369) internal successors, (8073), 1903 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 8073 transitions. [2021-06-12 20:37:00,757 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 8073 transitions. Word has length 29 [2021-06-12 20:37:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:00,757 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 8073 transitions. [2021-06-12 20:37:00,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 8073 transitions. [2021-06-12 20:37:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:00,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:00,762 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:00,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 20:37:00,986 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash 409541884, now seen corresponding path program 4 times [2021-06-12 20:37:00,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:00,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841581551] [2021-06-12 20:37:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:01,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841581551] [2021-06-12 20:37:01,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841581551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116727407] [2021-06-12 20:37:01,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:01,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:01,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:01,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:01,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116727407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:01,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 20:37:01,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937713557] [2021-06-12 20:37:01,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:01,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:01,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:01,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:01,242 INFO L87 Difference]: Start difference. First operand 1904 states and 8073 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:01,399 INFO L93 Difference]: Finished difference Result 2559 states and 10558 transitions. [2021-06-12 20:37:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:01,405 INFO L225 Difference]: With dead ends: 2559 [2021-06-12 20:37:01,405 INFO L226 Difference]: Without dead ends: 2540 [2021-06-12 20:37:01,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-06-12 20:37:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2000. [2021-06-12 20:37:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 4.245622811405703) internal successors, (8487), 1999 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 8487 transitions. [2021-06-12 20:37:01,436 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 8487 transitions. Word has length 29 [2021-06-12 20:37:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:01,436 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 8487 transitions. [2021-06-12 20:37:01,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 8487 transitions. [2021-06-12 20:37:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:01,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:01,440 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:01,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:01,640 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:01,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1831896710, now seen corresponding path program 5 times [2021-06-12 20:37:01,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:01,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641019690] [2021-06-12 20:37:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:01,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641019690] [2021-06-12 20:37:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641019690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054219178] [2021-06-12 20:37:01,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:01,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:01,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:01,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:01,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054219178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:01,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:01,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906993781] [2021-06-12 20:37:01,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:01,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:01,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:01,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:01,899 INFO L87 Difference]: Start difference. First operand 2000 states and 8487 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:02,053 INFO L93 Difference]: Finished difference Result 2517 states and 10450 transitions. [2021-06-12 20:37:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:02,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:02,059 INFO L225 Difference]: With dead ends: 2517 [2021-06-12 20:37:02,059 INFO L226 Difference]: Without dead ends: 2486 [2021-06-12 20:37:02,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-12 20:37:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1928. [2021-06-12 20:37:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 4.242345614945511) internal successors, (8175), 1927 states have internal predecessors, (8175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 8175 transitions. [2021-06-12 20:37:02,097 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 8175 transitions. Word has length 29 [2021-06-12 20:37:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:02,097 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 8175 transitions. [2021-06-12 20:37:02,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 8175 transitions. [2021-06-12 20:37:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:02,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:02,102 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:02,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 20:37:02,317 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:02,317 INFO L82 PathProgramCache]: Analyzing trace with hash -768158788, now seen corresponding path program 6 times [2021-06-12 20:37:02,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:02,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266443494] [2021-06-12 20:37:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:02,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:02,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266443494] [2021-06-12 20:37:02,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266443494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:02,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077879960] [2021-06-12 20:37:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:02,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:02,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:02,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:02,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:02,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:02,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:02,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077879960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:02,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:02,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:37:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218277615] [2021-06-12 20:37:02,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:02,655 INFO L87 Difference]: Start difference. First operand 1928 states and 8175 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:03,197 INFO L93 Difference]: Finished difference Result 2183 states and 9102 transitions. [2021-06-12 20:37:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:37:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:03,202 INFO L225 Difference]: With dead ends: 2183 [2021-06-12 20:37:03,202 INFO L226 Difference]: Without dead ends: 2164 [2021-06-12 20:37:03,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:37:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-06-12 20:37:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1916. [2021-06-12 20:37:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 4.246997389033942) internal successors, (8133), 1915 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 8133 transitions. [2021-06-12 20:37:03,228 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 8133 transitions. Word has length 29 [2021-06-12 20:37:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:03,228 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 8133 transitions. [2021-06-12 20:37:03,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 8133 transitions. [2021-06-12 20:37:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:03,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:03,232 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:03,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:03,440 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash 783680366, now seen corresponding path program 7 times [2021-06-12 20:37:03,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:03,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822162061] [2021-06-12 20:37:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:03,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822162061] [2021-06-12 20:37:03,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822162061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423898568] [2021-06-12 20:37:03,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:03,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:03,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:03,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:03,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:03,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:03,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:37:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:03,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423898568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:03,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:03,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:03,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935039533] [2021-06-12 20:37:03,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:03,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:03,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:03,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:03,705 INFO L87 Difference]: Start difference. First operand 1916 states and 8133 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:03,909 INFO L93 Difference]: Finished difference Result 2667 states and 11011 transitions. [2021-06-12 20:37:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:03,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:03,915 INFO L225 Difference]: With dead ends: 2667 [2021-06-12 20:37:03,915 INFO L226 Difference]: Without dead ends: 2648 [2021-06-12 20:37:03,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-12 20:37:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2020. [2021-06-12 20:37:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 4.246161466072313) internal successors, (8573), 2019 states have internal predecessors, (8573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 8573 transitions. [2021-06-12 20:37:03,959 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 8573 transitions. Word has length 29 [2021-06-12 20:37:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:03,959 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 8573 transitions. [2021-06-12 20:37:03,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 8573 transitions. [2021-06-12 20:37:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:03,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:03,992 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:04,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:37:04,192 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2088932104, now seen corresponding path program 8 times [2021-06-12 20:37:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:04,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690900163] [2021-06-12 20:37:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:04,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690900163] [2021-06-12 20:37:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690900163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433665771] [2021-06-12 20:37:04,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:04,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:04,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:04,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:04,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:04,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:04,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:04,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:04,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:04,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433665771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:04,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:04,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-12 20:37:04,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725808265] [2021-06-12 20:37:04,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:04,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:04,550 INFO L87 Difference]: Start difference. First operand 2020 states and 8573 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:05,115 INFO L93 Difference]: Finished difference Result 2896 states and 11879 transitions. [2021-06-12 20:37:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:37:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:05,120 INFO L225 Difference]: With dead ends: 2896 [2021-06-12 20:37:05,121 INFO L226 Difference]: Without dead ends: 2852 [2021-06-12 20:37:05,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:37:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-06-12 20:37:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1948. [2021-06-12 20:37:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 4.242937853107344) internal successors, (8261), 1947 states have internal predecessors, (8261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 8261 transitions. [2021-06-12 20:37:05,152 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 8261 transitions. Word has length 29 [2021-06-12 20:37:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:05,152 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 8261 transitions. [2021-06-12 20:37:05,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 8261 transitions. [2021-06-12 20:37:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:05,155 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:05,155 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:05,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:37:05,356 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash -394020306, now seen corresponding path program 9 times [2021-06-12 20:37:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:05,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091832137] [2021-06-12 20:37:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:05,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:05,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091832137] [2021-06-12 20:37:05,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091832137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:05,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384114444] [2021-06-12 20:37:05,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:05,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:05,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:05,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:05,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:05,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:05,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:05,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:05,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:05,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:05,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384114444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:05,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:05,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:37:05,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64159291] [2021-06-12 20:37:05,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:05,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:05,729 INFO L87 Difference]: Start difference. First operand 1948 states and 8261 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:06,295 INFO L93 Difference]: Finished difference Result 2330 states and 9645 transitions. [2021-06-12 20:37:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:37:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:06,301 INFO L225 Difference]: With dead ends: 2330 [2021-06-12 20:37:06,301 INFO L226 Difference]: Without dead ends: 2311 [2021-06-12 20:37:06,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:37:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-12 20:37:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1924. [2021-06-12 20:37:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 4.2428497139885595) internal successors, (8159), 1923 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 8159 transitions. [2021-06-12 20:37:06,339 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 8159 transitions. Word has length 29 [2021-06-12 20:37:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:06,339 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 8159 transitions. [2021-06-12 20:37:06,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 8159 transitions. [2021-06-12 20:37:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:06,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:06,344 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:06,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:06,567 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1761581676, now seen corresponding path program 10 times [2021-06-12 20:37:06,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:06,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59056829] [2021-06-12 20:37:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:06,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59056829] [2021-06-12 20:37:06,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59056829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916337555] [2021-06-12 20:37:06,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:06,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:37:06,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:06,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-12 20:37:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916337555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:06,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 20:37:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770787874] [2021-06-12 20:37:06,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:06,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:06,835 INFO L87 Difference]: Start difference. First operand 1924 states and 8159 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:07,048 INFO L93 Difference]: Finished difference Result 2053 states and 8574 transitions. [2021-06-12 20:37:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:07,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:07,054 INFO L225 Difference]: With dead ends: 2053 [2021-06-12 20:37:07,054 INFO L226 Difference]: Without dead ends: 2034 [2021-06-12 20:37:07,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-12 20:37:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1927. [2021-06-12 20:37:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 4.238836967808931) internal successors, (8164), 1926 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 8164 transitions. [2021-06-12 20:37:07,095 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 8164 transitions. Word has length 29 [2021-06-12 20:37:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:07,095 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 8164 transitions. [2021-06-12 20:37:07,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 8164 transitions. [2021-06-12 20:37:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:07,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:07,100 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:07,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:07,317 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 15 times [2021-06-12 20:37:07,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:07,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770858377] [2021-06-12 20:37:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:07,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:07,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770858377] [2021-06-12 20:37:07,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770858377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:07,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255858704] [2021-06-12 20:37:07,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:07,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:07,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:07,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:07,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:07,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:07,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:07,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:07,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255858704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:07,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:07,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:07,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553378637] [2021-06-12 20:37:07,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:07,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:07,695 INFO L87 Difference]: Start difference. First operand 1927 states and 8164 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:08,403 INFO L93 Difference]: Finished difference Result 2479 states and 10386 transitions. [2021-06-12 20:37:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:08,408 INFO L225 Difference]: With dead ends: 2479 [2021-06-12 20:37:08,409 INFO L226 Difference]: Without dead ends: 2464 [2021-06-12 20:37:08,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:37:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-06-12 20:37:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2017. [2021-06-12 20:37:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 4.249503968253968) internal successors, (8567), 2016 states have internal predecessors, (8567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 8567 transitions. [2021-06-12 20:37:08,459 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 8567 transitions. Word has length 29 [2021-06-12 20:37:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:08,459 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 8567 transitions. [2021-06-12 20:37:08,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 8567 transitions. [2021-06-12 20:37:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:08,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:08,463 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:08,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 20:37:08,664 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1416726916, now seen corresponding path program 16 times [2021-06-12 20:37:08,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:08,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374585672] [2021-06-12 20:37:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:08,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:08,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374585672] [2021-06-12 20:37:08,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374585672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:08,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820685490] [2021-06-12 20:37:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:08,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:08,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:08,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:08,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:08,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:37:08,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:08,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:08,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:08,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-12 20:37:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:09,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820685490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:09,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:09,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:09,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856397991] [2021-06-12 20:37:09,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:09,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:09,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:09,025 INFO L87 Difference]: Start difference. First operand 2017 states and 8567 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:09,545 INFO L93 Difference]: Finished difference Result 2677 states and 10974 transitions. [2021-06-12 20:37:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:37:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:09,551 INFO L225 Difference]: With dead ends: 2677 [2021-06-12 20:37:09,551 INFO L226 Difference]: Without dead ends: 2625 [2021-06-12 20:37:09,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:37:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-12 20:37:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2077. [2021-06-12 20:37:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 4.243256262042389) internal successors, (8809), 2076 states have internal predecessors, (8809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 8809 transitions. [2021-06-12 20:37:09,587 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 8809 transitions. Word has length 29 [2021-06-12 20:37:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:09,587 INFO L482 AbstractCegarLoop]: Abstraction has 2077 states and 8809 transitions. [2021-06-12 20:37:09,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 8809 transitions. [2021-06-12 20:37:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:09,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:09,590 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:09,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:09,791 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:09,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 17 times [2021-06-12 20:37:09,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:09,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91249311] [2021-06-12 20:37:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:09,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:09,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91249311] [2021-06-12 20:37:09,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91249311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:09,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405221133] [2021-06-12 20:37:09,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:09,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:09,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:37:09,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:10,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-06-12 20:37:10,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:10,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:10,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:10,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-12 20:37:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:10,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405221133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:10,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:10,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:37:10,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928703640] [2021-06-12 20:37:10,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:37:10,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:10,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:37:10,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:10,131 INFO L87 Difference]: Start difference. First operand 2077 states and 8809 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:10,527 INFO L93 Difference]: Finished difference Result 2569 states and 10651 transitions. [2021-06-12 20:37:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:37:10,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:10,532 INFO L225 Difference]: With dead ends: 2569 [2021-06-12 20:37:10,532 INFO L226 Difference]: Without dead ends: 2539 [2021-06-12 20:37:10,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:37:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-06-12 20:37:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2080. [2021-06-12 20:37:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 4.246753246753247) internal successors, (8829), 2079 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 8829 transitions. [2021-06-12 20:37:10,563 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 8829 transitions. Word has length 29 [2021-06-12 20:37:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:10,563 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 8829 transitions. [2021-06-12 20:37:10,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 8829 transitions. [2021-06-12 20:37:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:10,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:10,566 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:10,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 20:37:10,767 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash 506860148, now seen corresponding path program 18 times [2021-06-12 20:37:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:10,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051693706] [2021-06-12 20:37:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:10,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:10,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051693706] [2021-06-12 20:37:10,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051693706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:10,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696450465] [2021-06-12 20:37:10,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:10,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:10,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:10,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:10,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:10,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:10,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:10,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:10,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:10,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:11,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696450465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:11,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:11,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207336057] [2021-06-12 20:37:11,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:11,099 INFO L87 Difference]: Start difference. First operand 2080 states and 8829 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:11,805 INFO L93 Difference]: Finished difference Result 2573 states and 10625 transitions. [2021-06-12 20:37:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:11,812 INFO L225 Difference]: With dead ends: 2573 [2021-06-12 20:37:11,812 INFO L226 Difference]: Without dead ends: 2560 [2021-06-12 20:37:11,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:37:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-12 20:37:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2080. [2021-06-12 20:37:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 4.245310245310245) internal successors, (8826), 2079 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 8826 transitions. [2021-06-12 20:37:11,847 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 8826 transitions. Word has length 29 [2021-06-12 20:37:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:11,847 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 8826 transitions. [2021-06-12 20:37:11,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 8826 transitions. [2021-06-12 20:37:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:11,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:11,851 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:12,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 20:37:12,052 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash -751315058, now seen corresponding path program 19 times [2021-06-12 20:37:12,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:12,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804186359] [2021-06-12 20:37:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:12,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:12,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804186359] [2021-06-12 20:37:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804186359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:12,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509104185] [2021-06-12 20:37:12,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:12,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:37:12,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:12,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:12,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:12,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-12 20:37:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:12,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509104185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:12,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:12,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:12,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377589672] [2021-06-12 20:37:12,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:12,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:12,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:12,433 INFO L87 Difference]: Start difference. First operand 2080 states and 8826 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:12,880 INFO L93 Difference]: Finished difference Result 2713 states and 11103 transitions. [2021-06-12 20:37:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:37:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:12,886 INFO L225 Difference]: With dead ends: 2713 [2021-06-12 20:37:12,886 INFO L226 Difference]: Without dead ends: 2639 [2021-06-12 20:37:12,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:37:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-06-12 20:37:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2120. [2021-06-12 20:37:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 4.26805096743747) internal successors, (9044), 2119 states have internal predecessors, (9044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 9044 transitions. [2021-06-12 20:37:12,916 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 9044 transitions. Word has length 29 [2021-06-12 20:37:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:12,916 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 9044 transitions. [2021-06-12 20:37:12,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 9044 transitions. [2021-06-12 20:37:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:12,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:12,920 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:13,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 20:37:13,120 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 20 times [2021-06-12 20:37:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:13,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594876644] [2021-06-12 20:37:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:13,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594876644] [2021-06-12 20:37:13,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594876644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101013493] [2021-06-12 20:37:13,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:13,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:13,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:13,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:13,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-12 20:37:13,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:13,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:13,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:13,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-12 20:37:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:13,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101013493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:13,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:13,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:13,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497870363] [2021-06-12 20:37:13,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:13,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:13,511 INFO L87 Difference]: Start difference. First operand 2120 states and 9044 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:13,879 INFO L93 Difference]: Finished difference Result 2325 states and 9823 transitions. [2021-06-12 20:37:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:37:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:13,884 INFO L225 Difference]: With dead ends: 2325 [2021-06-12 20:37:13,884 INFO L226 Difference]: Without dead ends: 2310 [2021-06-12 20:37:13,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:37:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-12 20:37:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2132. [2021-06-12 20:37:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 4.259033317691225) internal successors, (9076), 2131 states have internal predecessors, (9076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 9076 transitions. [2021-06-12 20:37:13,913 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 9076 transitions. Word has length 29 [2021-06-12 20:37:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:13,913 INFO L482 AbstractCegarLoop]: Abstraction has 2132 states and 9076 transitions. [2021-06-12 20:37:13,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 9076 transitions. [2021-06-12 20:37:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:13,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:13,916 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:14,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 20:37:14,117 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 21 times [2021-06-12 20:37:14,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:14,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102892871] [2021-06-12 20:37:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:14,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:14,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102892871] [2021-06-12 20:37:14,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102892871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:14,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569854356] [2021-06-12 20:37:14,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:14,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:14,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:14,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:14,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:14,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:14,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:14,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:14,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:14,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:14,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:14,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569854356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:14,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:14,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:14,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83259872] [2021-06-12 20:37:14,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:14,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:14,491 INFO L87 Difference]: Start difference. First operand 2132 states and 9076 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:15,343 INFO L93 Difference]: Finished difference Result 2534 states and 10676 transitions. [2021-06-12 20:37:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:37:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:15,349 INFO L225 Difference]: With dead ends: 2534 [2021-06-12 20:37:15,349 INFO L226 Difference]: Without dead ends: 2519 [2021-06-12 20:37:15,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 776.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:37:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-12 20:37:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2165. [2021-06-12 20:37:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 4.264325323475046) internal successors, (9228), 2164 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 9228 transitions. [2021-06-12 20:37:15,380 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 9228 transitions. Word has length 29 [2021-06-12 20:37:15,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:15,380 INFO L482 AbstractCegarLoop]: Abstraction has 2165 states and 9228 transitions. [2021-06-12 20:37:15,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 9228 transitions. [2021-06-12 20:37:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:15,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:15,383 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:15,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:37:15,586 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:15,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:15,587 INFO L82 PathProgramCache]: Analyzing trace with hash 532560704, now seen corresponding path program 22 times [2021-06-12 20:37:15,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:15,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258494939] [2021-06-12 20:37:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:15,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:15,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258494939] [2021-06-12 20:37:15,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258494939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:15,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139698595] [2021-06-12 20:37:15,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:15,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:15,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:15,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:15,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:15,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:15,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:15,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 20:37:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:15,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139698595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:15,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:15,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441139510] [2021-06-12 20:37:15,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:15,924 INFO L87 Difference]: Start difference. First operand 2165 states and 9228 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:16,628 INFO L93 Difference]: Finished difference Result 2816 states and 11692 transitions. [2021-06-12 20:37:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:37:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:16,634 INFO L225 Difference]: With dead ends: 2816 [2021-06-12 20:37:16,634 INFO L226 Difference]: Without dead ends: 2764 [2021-06-12 20:37:16,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:37:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-06-12 20:37:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2221. [2021-06-12 20:37:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 4.260810810810811) internal successors, (9459), 2220 states have internal predecessors, (9459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 9459 transitions. [2021-06-12 20:37:16,683 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 9459 transitions. Word has length 29 [2021-06-12 20:37:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:16,683 INFO L482 AbstractCegarLoop]: Abstraction has 2221 states and 9459 transitions. [2021-06-12 20:37:16,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 9459 transitions. [2021-06-12 20:37:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:16,688 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:16,688 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:16,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 20:37:16,903 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:16,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:16,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1324674304, now seen corresponding path program 23 times [2021-06-12 20:37:16,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:16,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766778402] [2021-06-12 20:37:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766778402] [2021-06-12 20:37:17,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766778402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561452860] [2021-06-12 20:37:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:17,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:17,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:17,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 20:37:17,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:17,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:17,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:17,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-12 20:37:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561452860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:17,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:37:17,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410838630] [2021-06-12 20:37:17,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:17,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:17,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:17,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:17,209 INFO L87 Difference]: Start difference. First operand 2221 states and 9459 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:17,651 INFO L93 Difference]: Finished difference Result 2674 states and 11191 transitions. [2021-06-12 20:37:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:37:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:17,657 INFO L225 Difference]: With dead ends: 2674 [2021-06-12 20:37:17,657 INFO L226 Difference]: Without dead ends: 2644 [2021-06-12 20:37:17,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:37:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-06-12 20:37:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2225. [2021-06-12 20:37:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 4.262589928057554) internal successors, (9480), 2224 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 9480 transitions. [2021-06-12 20:37:17,691 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 9480 transitions. Word has length 29 [2021-06-12 20:37:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:17,691 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 9480 transitions. [2021-06-12 20:37:17,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 9480 transitions. [2021-06-12 20:37:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:17,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:17,696 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:17,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:37:17,906 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1838819528, now seen corresponding path program 24 times [2021-06-12 20:37:17,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:17,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149977963] [2021-06-12 20:37:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:17,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149977963] [2021-06-12 20:37:17,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149977963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891166495] [2021-06-12 20:37:17,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:18,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:18,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:18,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:18,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:18,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:18,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:18,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:18,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:18,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:18,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:18,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891166495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:18,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:18,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:18,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035966045] [2021-06-12 20:37:18,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:18,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:18,239 INFO L87 Difference]: Start difference. First operand 2225 states and 9480 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:18,871 INFO L93 Difference]: Finished difference Result 2614 states and 10932 transitions. [2021-06-12 20:37:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:37:18,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:18,877 INFO L225 Difference]: With dead ends: 2614 [2021-06-12 20:37:18,877 INFO L226 Difference]: Without dead ends: 2601 [2021-06-12 20:37:18,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:37:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-12 20:37:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2218. [2021-06-12 20:37:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 4.2652232746955345) internal successors, (9456), 2217 states have internal predecessors, (9456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 9456 transitions. [2021-06-12 20:37:18,906 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 9456 transitions. Word has length 29 [2021-06-12 20:37:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:18,906 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 9456 transitions. [2021-06-12 20:37:18,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 9456 transitions. [2021-06-12 20:37:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:18,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:18,909 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:19,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:19,111 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1197972562, now seen corresponding path program 25 times [2021-06-12 20:37:19,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:19,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580016292] [2021-06-12 20:37:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:19,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580016292] [2021-06-12 20:37:19,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580016292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218777555] [2021-06-12 20:37:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:19,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:19,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:19,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:19,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:19,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:19,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 20:37:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218777555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:19,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:19,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44930986] [2021-06-12 20:37:19,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:19,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:19,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:19,443 INFO L87 Difference]: Start difference. First operand 2218 states and 9456 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:20,052 INFO L93 Difference]: Finished difference Result 2842 states and 11822 transitions. [2021-06-12 20:37:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:37:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:20,058 INFO L225 Difference]: With dead ends: 2842 [2021-06-12 20:37:20,058 INFO L226 Difference]: Without dead ends: 2771 [2021-06-12 20:37:20,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:37:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-06-12 20:37:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2141. [2021-06-12 20:37:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 4.260747663551402) internal successors, (9118), 2140 states have internal predecessors, (9118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 9118 transitions. [2021-06-12 20:37:20,145 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 9118 transitions. Word has length 29 [2021-06-12 20:37:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:20,145 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 9118 transitions. [2021-06-12 20:37:20,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 9118 transitions. [2021-06-12 20:37:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:20,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:20,149 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:20,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:20,363 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:20,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:20,363 INFO L82 PathProgramCache]: Analyzing trace with hash -680907206, now seen corresponding path program 26 times [2021-06-12 20:37:20,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:20,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962143094] [2021-06-12 20:37:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:20,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962143094] [2021-06-12 20:37:20,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962143094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:20,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33489660] [2021-06-12 20:37:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:20,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:20,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:20,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:20,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:20,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:20,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:20,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:20,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:20,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:20,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:20,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33489660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:20,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:20,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:20,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194690493] [2021-06-12 20:37:20,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:20,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:20,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:20,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:20,739 INFO L87 Difference]: Start difference. First operand 2141 states and 9118 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:21,650 INFO L93 Difference]: Finished difference Result 2748 states and 11494 transitions. [2021-06-12 20:37:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:37:21,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:21,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:21,657 INFO L225 Difference]: With dead ends: 2748 [2021-06-12 20:37:21,658 INFO L226 Difference]: Without dead ends: 2733 [2021-06-12 20:37:21,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:37:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-06-12 20:37:21,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2211. [2021-06-12 20:37:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 4.270588235294118) internal successors, (9438), 2210 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 9438 transitions. [2021-06-12 20:37:21,695 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 9438 transitions. Word has length 29 [2021-06-12 20:37:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:21,695 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 9438 transitions. [2021-06-12 20:37:21,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 9438 transitions. [2021-06-12 20:37:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:21,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:21,699 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:21,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:21,913 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash -869748772, now seen corresponding path program 27 times [2021-06-12 20:37:21,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:21,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14460022] [2021-06-12 20:37:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:22,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:22,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14460022] [2021-06-12 20:37:22,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14460022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:22,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073535622] [2021-06-12 20:37:22,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:22,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:22,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:22,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:22,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:22,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:22,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:22,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:22,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:22,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073535622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:22,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:22,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:22,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301629228] [2021-06-12 20:37:22,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:22,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:22,320 INFO L87 Difference]: Start difference. First operand 2211 states and 9438 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:22,975 INFO L93 Difference]: Finished difference Result 2647 states and 11020 transitions. [2021-06-12 20:37:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:37:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:22,980 INFO L225 Difference]: With dead ends: 2647 [2021-06-12 20:37:22,980 INFO L226 Difference]: Without dead ends: 2638 [2021-06-12 20:37:22,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 661.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:37:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-06-12 20:37:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2218. [2021-06-12 20:37:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 4.266576454668471) internal successors, (9459), 2217 states have internal predecessors, (9459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 9459 transitions. [2021-06-12 20:37:23,012 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 9459 transitions. Word has length 29 [2021-06-12 20:37:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:23,012 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 9459 transitions. [2021-06-12 20:37:23,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 9459 transitions. [2021-06-12 20:37:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:23,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:23,015 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:23,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 20:37:23,216 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1756825082, now seen corresponding path program 28 times [2021-06-12 20:37:23,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:23,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615501852] [2021-06-12 20:37:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:23,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615501852] [2021-06-12 20:37:23,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615501852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628094525] [2021-06-12 20:37:23,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:23,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:23,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:23,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:23,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:23,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:23,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-12 20:37:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:23,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628094525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:23,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:23,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:23,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943704341] [2021-06-12 20:37:23,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:23,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:23,508 INFO L87 Difference]: Start difference. First operand 2218 states and 9459 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:24,125 INFO L93 Difference]: Finished difference Result 3047 states and 12394 transitions. [2021-06-12 20:37:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:37:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:24,131 INFO L225 Difference]: With dead ends: 3047 [2021-06-12 20:37:24,131 INFO L226 Difference]: Without dead ends: 2981 [2021-06-12 20:37:24,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:37:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-06-12 20:37:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2274. [2021-06-12 20:37:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2273 states have (on average 4.276726792784866) internal successors, (9721), 2273 states have internal predecessors, (9721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 9721 transitions. [2021-06-12 20:37:24,166 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 9721 transitions. Word has length 29 [2021-06-12 20:37:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:24,166 INFO L482 AbstractCegarLoop]: Abstraction has 2274 states and 9721 transitions. [2021-06-12 20:37:24,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 9721 transitions. [2021-06-12 20:37:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:24,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:24,170 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:24,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:24,370 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2127923978, now seen corresponding path program 29 times [2021-06-12 20:37:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:24,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041376525] [2021-06-12 20:37:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:24,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041376525] [2021-06-12 20:37:24,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041376525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877666172] [2021-06-12 20:37:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:24,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:24,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:24,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:24,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 20:37:24,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:24,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:24,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:24,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-12 20:37:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877666172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:24,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:37:24,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795018737] [2021-06-12 20:37:24,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:24,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:24,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:24,699 INFO L87 Difference]: Start difference. First operand 2274 states and 9721 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:25,112 INFO L93 Difference]: Finished difference Result 2757 states and 11551 transitions. [2021-06-12 20:37:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:37:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:25,118 INFO L225 Difference]: With dead ends: 2757 [2021-06-12 20:37:25,118 INFO L226 Difference]: Without dead ends: 2719 [2021-06-12 20:37:25,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:37:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-06-12 20:37:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2235. [2021-06-12 20:37:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 4.284691136974038) internal successors, (9572), 2234 states have internal predecessors, (9572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 9572 transitions. [2021-06-12 20:37:25,153 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 9572 transitions. Word has length 29 [2021-06-12 20:37:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:25,153 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 9572 transitions. [2021-06-12 20:37:25,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 9572 transitions. [2021-06-12 20:37:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:25,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:25,157 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:25,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:25,357 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash 914526842, now seen corresponding path program 30 times [2021-06-12 20:37:25,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:25,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135443055] [2021-06-12 20:37:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:25,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:25,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135443055] [2021-06-12 20:37:25,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135443055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:25,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040618775] [2021-06-12 20:37:25,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:25,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:37:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:25,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:25,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:25,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:25,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:25,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:25,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:25,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040618775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:25,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:25,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781172224] [2021-06-12 20:37:25,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:25,720 INFO L87 Difference]: Start difference. First operand 2235 states and 9572 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:26,005 INFO L93 Difference]: Finished difference Result 2333 states and 9898 transitions. [2021-06-12 20:37:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:26,005 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:26,010 INFO L225 Difference]: With dead ends: 2333 [2021-06-12 20:37:26,010 INFO L226 Difference]: Without dead ends: 2314 [2021-06-12 20:37:26,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-12 20:37:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2232. [2021-06-12 20:37:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 4.285970416853429) internal successors, (9562), 2231 states have internal predecessors, (9562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 9562 transitions. [2021-06-12 20:37:26,038 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 9562 transitions. Word has length 29 [2021-06-12 20:37:26,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:26,038 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 9562 transitions. [2021-06-12 20:37:26,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 9562 transitions. [2021-06-12 20:37:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:26,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:26,041 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:26,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 20:37:26,242 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:26,242 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 11 times [2021-06-12 20:37:26,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:26,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749541049] [2021-06-12 20:37:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:26,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749541049] [2021-06-12 20:37:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749541049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886347174] [2021-06-12 20:37:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:26,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:26,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:26,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:26,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:26,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:26,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:26,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:37:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:26,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886347174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:26,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:26,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:37:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564126370] [2021-06-12 20:37:26,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:26,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:26,595 INFO L87 Difference]: Start difference. First operand 2232 states and 9562 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:26,867 INFO L93 Difference]: Finished difference Result 2975 states and 12517 transitions. [2021-06-12 20:37:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:26,875 INFO L225 Difference]: With dead ends: 2975 [2021-06-12 20:37:26,875 INFO L226 Difference]: Without dead ends: 2956 [2021-06-12 20:37:26,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-06-12 20:37:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2412. [2021-06-12 20:37:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 4.290335960182497) internal successors, (10344), 2411 states have internal predecessors, (10344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 10344 transitions. [2021-06-12 20:37:26,927 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 10344 transitions. Word has length 29 [2021-06-12 20:37:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:26,927 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 10344 transitions. [2021-06-12 20:37:26,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 10344 transitions. [2021-06-12 20:37:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:26,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:26,932 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:27,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 20:37:27,146 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 12 times [2021-06-12 20:37:27,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:27,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255319585] [2021-06-12 20:37:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:27,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255319585] [2021-06-12 20:37:27,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255319585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236187214] [2021-06-12 20:37:27,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:27,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:27,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:27,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:27,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:27,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:27,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:27,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:27,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236187214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:27,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:27,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:27,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883176235] [2021-06-12 20:37:27,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:27,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:27,519 INFO L87 Difference]: Start difference. First operand 2412 states and 10344 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:27,939 INFO L93 Difference]: Finished difference Result 2833 states and 11900 transitions. [2021-06-12 20:37:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:37:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:27,946 INFO L225 Difference]: With dead ends: 2833 [2021-06-12 20:37:27,946 INFO L226 Difference]: Without dead ends: 2820 [2021-06-12 20:37:27,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 457.0ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:37:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-12 20:37:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2403. [2021-06-12 20:37:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2402 states have (on average 4.293921731890092) internal successors, (10314), 2402 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 10314 transitions. [2021-06-12 20:37:27,984 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 10314 transitions. Word has length 29 [2021-06-12 20:37:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:27,984 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 10314 transitions. [2021-06-12 20:37:27,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 10314 transitions. [2021-06-12 20:37:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:27,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:27,987 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:28,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 20:37:28,189 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:28,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 13 times [2021-06-12 20:37:28,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:28,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058800345] [2021-06-12 20:37:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:28,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058800345] [2021-06-12 20:37:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058800345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879087078] [2021-06-12 20:37:28,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:28,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:28,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:28,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:37:28,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:28,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:28,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:28,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-12 20:37:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:28,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879087078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:28,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:28,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 20:37:28,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439222216] [2021-06-12 20:37:28,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:28,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:28,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:28,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:28,539 INFO L87 Difference]: Start difference. First operand 2403 states and 10314 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:28,768 INFO L93 Difference]: Finished difference Result 2988 states and 12543 transitions. [2021-06-12 20:37:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:28,774 INFO L225 Difference]: With dead ends: 2988 [2021-06-12 20:37:28,774 INFO L226 Difference]: Without dead ends: 2960 [2021-06-12 20:37:28,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-06-12 20:37:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2382. [2021-06-12 20:37:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 4.293154136917262) internal successors, (10222), 2381 states have internal predecessors, (10222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 10222 transitions. [2021-06-12 20:37:28,811 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 10222 transitions. Word has length 29 [2021-06-12 20:37:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:28,811 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 10222 transitions. [2021-06-12 20:37:28,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 10222 transitions. [2021-06-12 20:37:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:28,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:28,815 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:29,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:29,016 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:29,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 14 times [2021-06-12 20:37:29,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:29,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020418097] [2021-06-12 20:37:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:29,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:29,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020418097] [2021-06-12 20:37:29,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020418097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:29,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130862366] [2021-06-12 20:37:29,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:29,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:29,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:29,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:29,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:29,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:29,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:29,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:29,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:29,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-12 20:37:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:29,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130862366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:29,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:29,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:29,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039806213] [2021-06-12 20:37:29,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:29,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:29,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:29,484 INFO L87 Difference]: Start difference. First operand 2382 states and 10222 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:30,296 INFO L93 Difference]: Finished difference Result 3041 states and 12875 transitions. [2021-06-12 20:37:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:37:30,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:30,303 INFO L225 Difference]: With dead ends: 3041 [2021-06-12 20:37:30,303 INFO L226 Difference]: Without dead ends: 3026 [2021-06-12 20:37:30,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 823.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:37:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-12 20:37:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2370. [2021-06-12 20:37:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2369 states have (on average 4.295483326298016) internal successors, (10176), 2369 states have internal predecessors, (10176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 10176 transitions. [2021-06-12 20:37:30,340 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 10176 transitions. Word has length 29 [2021-06-12 20:37:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:30,340 INFO L482 AbstractCegarLoop]: Abstraction has 2370 states and 10176 transitions. [2021-06-12 20:37:30,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 10176 transitions. [2021-06-12 20:37:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:30,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:30,344 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:30,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:30,544 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 15 times [2021-06-12 20:37:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:30,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863738366] [2021-06-12 20:37:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:30,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:30,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863738366] [2021-06-12 20:37:30,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863738366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:30,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967168156] [2021-06-12 20:37:30,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:30,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:30,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:30,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-12 20:37:30,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:30,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:30,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:30,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-12 20:37:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:30,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967168156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:30,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:30,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011891607] [2021-06-12 20:37:30,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:30,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:30,952 INFO L87 Difference]: Start difference. First operand 2370 states and 10176 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:31,490 INFO L93 Difference]: Finished difference Result 2464 states and 10478 transitions. [2021-06-12 20:37:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:37:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:31,496 INFO L225 Difference]: With dead ends: 2464 [2021-06-12 20:37:31,496 INFO L226 Difference]: Without dead ends: 2449 [2021-06-12 20:37:31,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:37:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-12 20:37:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2364. [2021-06-12 20:37:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 4.298349555649598) internal successors, (10157), 2363 states have internal predecessors, (10157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 10157 transitions. [2021-06-12 20:37:31,537 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 10157 transitions. Word has length 29 [2021-06-12 20:37:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:31,538 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 10157 transitions. [2021-06-12 20:37:31,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 10157 transitions. [2021-06-12 20:37:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:31,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:31,541 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:31,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:31,742 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 16 times [2021-06-12 20:37:31,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:31,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468035741] [2021-06-12 20:37:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:31,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:31,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468035741] [2021-06-12 20:37:31,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468035741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:31,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3497135] [2021-06-12 20:37:31,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:31,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:37:31,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:31,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:31,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:31,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-12 20:37:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:32,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3497135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:32,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:32,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:37:32,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710687787] [2021-06-12 20:37:32,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:32,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:32,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:32,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:32,082 INFO L87 Difference]: Start difference. First operand 2364 states and 10157 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:32,275 INFO L93 Difference]: Finished difference Result 2936 states and 12417 transitions. [2021-06-12 20:37:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:32,282 INFO L225 Difference]: With dead ends: 2936 [2021-06-12 20:37:32,282 INFO L226 Difference]: Without dead ends: 2917 [2021-06-12 20:37:32,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-12 20:37:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2475. [2021-06-12 20:37:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 4.301131770412288) internal successors, (10641), 2474 states have internal predecessors, (10641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10641 transitions. [2021-06-12 20:37:32,330 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10641 transitions. Word has length 29 [2021-06-12 20:37:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:32,330 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10641 transitions. [2021-06-12 20:37:32,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10641 transitions. [2021-06-12 20:37:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:32,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:32,335 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:32,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:32,558 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:32,558 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 17 times [2021-06-12 20:37:32,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:32,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339962100] [2021-06-12 20:37:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:32,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339962100] [2021-06-12 20:37:32,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339962100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912070852] [2021-06-12 20:37:32,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:32,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:32,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:32,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:32,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:32,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:32,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:32,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:32,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912070852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:32,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:32,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 20:37:32,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684737428] [2021-06-12 20:37:32,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:32,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:32,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:32,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:32,894 INFO L87 Difference]: Start difference. First operand 2475 states and 10641 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:33,044 INFO L93 Difference]: Finished difference Result 2952 states and 12454 transitions. [2021-06-12 20:37:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:33,051 INFO L225 Difference]: With dead ends: 2952 [2021-06-12 20:37:33,051 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 20:37:33,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 20:37:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-12 20:37:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2402 states have (on average 4.301415487094088) internal successors, (10332), 2402 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 10332 transitions. [2021-06-12 20:37:33,091 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 10332 transitions. Word has length 29 [2021-06-12 20:37:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:33,091 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 10332 transitions. [2021-06-12 20:37:33,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 10332 transitions. [2021-06-12 20:37:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:33,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:33,096 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:33,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 20:37:33,310 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 18 times [2021-06-12 20:37:33,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:33,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548220415] [2021-06-12 20:37:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:33,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:33,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548220415] [2021-06-12 20:37:33,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548220415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:33,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816507968] [2021-06-12 20:37:33,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:33,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:33,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:33,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:33,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:33,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:33,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:33,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:33,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:33,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816507968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:33,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:33,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697162302] [2021-06-12 20:37:33,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:33,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:33,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:33,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:33,696 INFO L87 Difference]: Start difference. First operand 2403 states and 10332 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:34,299 INFO L93 Difference]: Finished difference Result 2619 states and 11113 transitions. [2021-06-12 20:37:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:37:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:34,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:34,305 INFO L225 Difference]: With dead ends: 2619 [2021-06-12 20:37:34,305 INFO L226 Difference]: Without dead ends: 2604 [2021-06-12 20:37:34,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 546.7ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:37:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-12 20:37:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2373. [2021-06-12 20:37:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2372 states have (on average 4.298482293423271) internal successors, (10196), 2372 states have internal predecessors, (10196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 10196 transitions. [2021-06-12 20:37:34,336 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 10196 transitions. Word has length 29 [2021-06-12 20:37:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:34,336 INFO L482 AbstractCegarLoop]: Abstraction has 2373 states and 10196 transitions. [2021-06-12 20:37:34,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 10196 transitions. [2021-06-12 20:37:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:34,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:34,339 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:34,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:34,540 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 19 times [2021-06-12 20:37:34,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:34,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451273542] [2021-06-12 20:37:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:34,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:34,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451273542] [2021-06-12 20:37:34,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451273542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:34,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119381201] [2021-06-12 20:37:34,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:34,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:34,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:34,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:34,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:34,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:34,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119381201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:34,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:34,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:37:34,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633416579] [2021-06-12 20:37:34,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:34,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:34,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:34,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:34,870 INFO L87 Difference]: Start difference. First operand 2373 states and 10196 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:35,025 INFO L93 Difference]: Finished difference Result 2980 states and 12477 transitions. [2021-06-12 20:37:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:35,032 INFO L225 Difference]: With dead ends: 2980 [2021-06-12 20:37:35,032 INFO L226 Difference]: Without dead ends: 2961 [2021-06-12 20:37:35,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-06-12 20:37:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2469. [2021-06-12 20:37:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 4.296596434359805) internal successors, (10604), 2468 states have internal predecessors, (10604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 10604 transitions. [2021-06-12 20:37:35,071 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 10604 transitions. Word has length 29 [2021-06-12 20:37:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:35,072 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 10604 transitions. [2021-06-12 20:37:35,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 10604 transitions. [2021-06-12 20:37:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:35,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:35,075 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 20:37:35,276 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 20 times [2021-06-12 20:37:35,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:35,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283377080] [2021-06-12 20:37:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:35,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:35,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283377080] [2021-06-12 20:37:35,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283377080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:35,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345791191] [2021-06-12 20:37:35,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:35,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:35,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:35,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:35,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:35,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:35,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:35,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:35,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:35,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345791191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:35,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:35,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:35,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450525006] [2021-06-12 20:37:35,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:35,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:35,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:35,628 INFO L87 Difference]: Start difference. First operand 2469 states and 10604 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:36,093 INFO L93 Difference]: Finished difference Result 2879 states and 12012 transitions. [2021-06-12 20:37:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:37:36,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:36,099 INFO L225 Difference]: With dead ends: 2879 [2021-06-12 20:37:36,099 INFO L226 Difference]: Without dead ends: 2866 [2021-06-12 20:37:36,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:37:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-06-12 20:37:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2469. [2021-06-12 20:37:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 4.295380875202593) internal successors, (10601), 2468 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 10601 transitions. [2021-06-12 20:37:36,133 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 10601 transitions. Word has length 29 [2021-06-12 20:37:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:36,134 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 10601 transitions. [2021-06-12 20:37:36,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 10601 transitions. [2021-06-12 20:37:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:36,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:36,138 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:36,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 20:37:36,353 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash 32025046, now seen corresponding path program 21 times [2021-06-12 20:37:36,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:36,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170789133] [2021-06-12 20:37:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:36,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:36,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170789133] [2021-06-12 20:37:36,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170789133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:36,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078422772] [2021-06-12 20:37:36,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:36,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:36,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:36,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:36,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:36,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:36,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:36,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:36,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:36,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:36,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078422772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:36,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:36,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:36,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699988020] [2021-06-12 20:37:36,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:36,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:36,751 INFO L87 Difference]: Start difference. First operand 2469 states and 10601 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:37,445 INFO L93 Difference]: Finished difference Result 2832 states and 11880 transitions. [2021-06-12 20:37:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:37:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:37,451 INFO L225 Difference]: With dead ends: 2832 [2021-06-12 20:37:37,451 INFO L226 Difference]: Without dead ends: 2817 [2021-06-12 20:37:37,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:37:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-06-12 20:37:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2476. [2021-06-12 20:37:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 4.291717171717171) internal successors, (10622), 2475 states have internal predecessors, (10622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 10622 transitions. [2021-06-12 20:37:37,495 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 10622 transitions. Word has length 29 [2021-06-12 20:37:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:37,496 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 10622 transitions. [2021-06-12 20:37:37,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 10622 transitions. [2021-06-12 20:37:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:37,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:37,501 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:37,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:37,707 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:37,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:37,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1748573256, now seen corresponding path program 22 times [2021-06-12 20:37:37,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:37,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931834894] [2021-06-12 20:37:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:37,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:37,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931834894] [2021-06-12 20:37:37,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931834894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:37,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484454562] [2021-06-12 20:37:37,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:37,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:37,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:37,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:37,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:37,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:37,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:37,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:38,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484454562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:38,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:38,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 20:37:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43040004] [2021-06-12 20:37:38,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:38,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:38,009 INFO L87 Difference]: Start difference. First operand 2476 states and 10622 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:38,151 INFO L93 Difference]: Finished difference Result 2938 states and 12363 transitions. [2021-06-12 20:37:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:38,157 INFO L225 Difference]: With dead ends: 2938 [2021-06-12 20:37:38,157 INFO L226 Difference]: Without dead ends: 2913 [2021-06-12 20:37:38,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2021-06-12 20:37:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2397. [2021-06-12 20:37:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2396 states have (on average 4.296744574290484) internal successors, (10295), 2396 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 10295 transitions. [2021-06-12 20:37:38,191 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 10295 transitions. Word has length 29 [2021-06-12 20:37:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:38,191 INFO L482 AbstractCegarLoop]: Abstraction has 2397 states and 10295 transitions. [2021-06-12 20:37:38,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 10295 transitions. [2021-06-12 20:37:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:38,195 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:38,195 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:38,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 20:37:38,396 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2122928432, now seen corresponding path program 23 times [2021-06-12 20:37:38,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:38,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056760044] [2021-06-12 20:37:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:38,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:38,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056760044] [2021-06-12 20:37:38,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056760044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:38,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405084638] [2021-06-12 20:37:38,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:38,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:38,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:37:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:38,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:38,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:38,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:38,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:38,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-12 20:37:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:38,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405084638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:38,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:38,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 20:37:38,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793807596] [2021-06-12 20:37:38,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:38,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:38,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:38,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:38,717 INFO L87 Difference]: Start difference. First operand 2397 states and 10295 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:38,942 INFO L93 Difference]: Finished difference Result 2543 states and 10791 transitions. [2021-06-12 20:37:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:37:38,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:38,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:38,947 INFO L225 Difference]: With dead ends: 2543 [2021-06-12 20:37:38,947 INFO L226 Difference]: Without dead ends: 2524 [2021-06-12 20:37:38,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-06-12 20:37:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2394. [2021-06-12 20:37:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 4.2983702465524445) internal successors, (10286), 2393 states have internal predecessors, (10286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 10286 transitions. [2021-06-12 20:37:38,981 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 10286 transitions. Word has length 29 [2021-06-12 20:37:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:38,981 INFO L482 AbstractCegarLoop]: Abstraction has 2394 states and 10286 transitions. [2021-06-12 20:37:38,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 10286 transitions. [2021-06-12 20:37:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:38,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:38,985 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:39,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:39,208 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash 837938, now seen corresponding path program 1 times [2021-06-12 20:37:39,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:39,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195247468] [2021-06-12 20:37:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:39,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:39,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195247468] [2021-06-12 20:37:39,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195247468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:39,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755708994] [2021-06-12 20:37:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:39,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:39,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:39,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:39,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-12 20:37:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:39,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755708994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:39,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:39,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:37:39,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634310749] [2021-06-12 20:37:39,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:39,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:39,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:39,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:39,530 INFO L87 Difference]: Start difference. First operand 2394 states and 10286 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:39,816 INFO L93 Difference]: Finished difference Result 2646 states and 11184 transitions. [2021-06-12 20:37:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:39,822 INFO L225 Difference]: With dead ends: 2646 [2021-06-12 20:37:39,822 INFO L226 Difference]: Without dead ends: 2627 [2021-06-12 20:37:39,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:37:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-06-12 20:37:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2496. [2021-06-12 20:37:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 4.287374749498998) internal successors, (10697), 2495 states have internal predecessors, (10697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 10697 transitions. [2021-06-12 20:37:39,871 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 10697 transitions. Word has length 29 [2021-06-12 20:37:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:39,871 INFO L482 AbstractCegarLoop]: Abstraction has 2496 states and 10697 transitions. [2021-06-12 20:37:39,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 10697 transitions. [2021-06-12 20:37:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:39,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:39,875 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:40,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 20:37:40,076 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash -3932270, now seen corresponding path program 1 times [2021-06-12 20:37:40,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:40,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454495733] [2021-06-12 20:37:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:40,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454495733] [2021-06-12 20:37:40,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454495733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507959203] [2021-06-12 20:37:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:40,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:40,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:40,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:40,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:40,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:40,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-12 20:37:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507959203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:40,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:40,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:37:40,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104411858] [2021-06-12 20:37:40,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:40,346 INFO L87 Difference]: Start difference. First operand 2496 states and 10697 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:40,643 INFO L93 Difference]: Finished difference Result 2655 states and 11205 transitions. [2021-06-12 20:37:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:40,650 INFO L225 Difference]: With dead ends: 2655 [2021-06-12 20:37:40,650 INFO L226 Difference]: Without dead ends: 2636 [2021-06-12 20:37:40,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-06-12 20:37:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2498. [2021-06-12 20:37:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 4.2871445734881855) internal successors, (10705), 2497 states have internal predecessors, (10705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 10705 transitions. [2021-06-12 20:37:40,700 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 10705 transitions. Word has length 29 [2021-06-12 20:37:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:40,700 INFO L482 AbstractCegarLoop]: Abstraction has 2498 states and 10705 transitions. [2021-06-12 20:37:40,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 10705 transitions. [2021-06-12 20:37:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:40,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:40,706 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:40,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:40,929 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1006933494, now seen corresponding path program 2 times [2021-06-12 20:37:40,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:40,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058812787] [2021-06-12 20:37:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:41,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:41,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058812787] [2021-06-12 20:37:41,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058812787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:41,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239171521] [2021-06-12 20:37:41,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:41,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:41,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:41,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:41,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:41,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:41,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:41,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:41,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-12 20:37:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:41,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239171521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:41,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:41,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:37:41,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16032984] [2021-06-12 20:37:41,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:37:41,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:41,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:37:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:41,308 INFO L87 Difference]: Start difference. First operand 2498 states and 10705 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:41,882 INFO L93 Difference]: Finished difference Result 2861 states and 12082 transitions. [2021-06-12 20:37:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:37:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:41,888 INFO L225 Difference]: With dead ends: 2861 [2021-06-12 20:37:41,888 INFO L226 Difference]: Without dead ends: 2842 [2021-06-12 20:37:41,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 549.2ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:37:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-06-12 20:37:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2528. [2021-06-12 20:37:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 4.290067273446775) internal successors, (10841), 2527 states have internal predecessors, (10841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 10841 transitions. [2021-06-12 20:37:41,923 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 10841 transitions. Word has length 29 [2021-06-12 20:37:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:41,923 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 10841 transitions. [2021-06-12 20:37:41,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 10841 transitions. [2021-06-12 20:37:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:41,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:41,927 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:42,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 20:37:42,128 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1570530918, now seen corresponding path program 3 times [2021-06-12 20:37:42,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:42,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663243313] [2021-06-12 20:37:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:42,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:42,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663243313] [2021-06-12 20:37:42,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663243313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:42,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461475622] [2021-06-12 20:37:42,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:42,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:42,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:42,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:42,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:42,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:42,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:42,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:42,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:42,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:42,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:42,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461475622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:42,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:42,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:37:42,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248511779] [2021-06-12 20:37:42,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:37:42,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:37:42,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:42,530 INFO L87 Difference]: Start difference. First operand 2528 states and 10841 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:43,260 INFO L93 Difference]: Finished difference Result 3104 states and 12900 transitions. [2021-06-12 20:37:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:37:43,261 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:43,267 INFO L225 Difference]: With dead ends: 3104 [2021-06-12 20:37:43,267 INFO L226 Difference]: Without dead ends: 3066 [2021-06-12 20:37:43,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 629.8ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:37:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-06-12 20:37:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2598. [2021-06-12 20:37:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2597 states have (on average 4.291105121293801) internal successors, (11144), 2597 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 11144 transitions. [2021-06-12 20:37:43,306 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 11144 transitions. Word has length 29 [2021-06-12 20:37:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:43,307 INFO L482 AbstractCegarLoop]: Abstraction has 2598 states and 11144 transitions. [2021-06-12 20:37:43,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 11144 transitions. [2021-06-12 20:37:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:43,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:43,311 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:43,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:43,511 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1941755924, now seen corresponding path program 4 times [2021-06-12 20:37:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:43,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908239955] [2021-06-12 20:37:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:43,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908239955] [2021-06-12 20:37:43,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908239955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082203350] [2021-06-12 20:37:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:43,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:43,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:43,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:43,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:43,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:43,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:43,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:37:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082203350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:43,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:43,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 20:37:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112514903] [2021-06-12 20:37:43,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:37:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:37:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:43,799 INFO L87 Difference]: Start difference. First operand 2598 states and 11144 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:44,112 INFO L93 Difference]: Finished difference Result 3138 states and 13215 transitions. [2021-06-12 20:37:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:44,149 INFO L225 Difference]: With dead ends: 3138 [2021-06-12 20:37:44,149 INFO L226 Difference]: Without dead ends: 3123 [2021-06-12 20:37:44,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:44,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-12 20:37:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2607. [2021-06-12 20:37:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 4.2866462010744435) internal successors, (11171), 2606 states have internal predecessors, (11171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 11171 transitions. [2021-06-12 20:37:44,190 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 11171 transitions. Word has length 29 [2021-06-12 20:37:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:44,190 INFO L482 AbstractCegarLoop]: Abstraction has 2607 states and 11171 transitions. [2021-06-12 20:37:44,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 11171 transitions. [2021-06-12 20:37:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:44,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:44,194 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:44,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 20:37:44,394 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:44,395 INFO L82 PathProgramCache]: Analyzing trace with hash 684817930, now seen corresponding path program 5 times [2021-06-12 20:37:44,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:44,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044843986] [2021-06-12 20:37:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:44,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044843986] [2021-06-12 20:37:44,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044843986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575584702] [2021-06-12 20:37:44,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:44,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:44,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:44,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:44,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:44,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:44,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:44,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:44,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:37:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:44,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575584702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:44,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:44,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 20:37:44,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557009133] [2021-06-12 20:37:44,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:37:44,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:37:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:44,691 INFO L87 Difference]: Start difference. First operand 2607 states and 11171 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:44,949 INFO L93 Difference]: Finished difference Result 3151 states and 13265 transitions. [2021-06-12 20:37:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:44,956 INFO L225 Difference]: With dead ends: 3151 [2021-06-12 20:37:44,956 INFO L226 Difference]: Without dead ends: 3125 [2021-06-12 20:37:44,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-06-12 20:37:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2512. [2021-06-12 20:37:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 4.297889287136599) internal successors, (10792), 2511 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 10792 transitions. [2021-06-12 20:37:44,993 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 10792 transitions. Word has length 29 [2021-06-12 20:37:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:44,993 INFO L482 AbstractCegarLoop]: Abstraction has 2512 states and 10792 transitions. [2021-06-12 20:37:44,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 10792 transitions. [2021-06-12 20:37:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:44,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:44,996 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:45,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:45,201 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash -420261250, now seen corresponding path program 2 times [2021-06-12 20:37:45,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:45,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046295918] [2021-06-12 20:37:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:45,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:45,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046295918] [2021-06-12 20:37:45,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046295918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:45,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780404604] [2021-06-12 20:37:45,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:45,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:45,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:45,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:45,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:45,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:45,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:45,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:45,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:45,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:45,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780404604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:45,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:45,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:37:45,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664725292] [2021-06-12 20:37:45,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:45,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:45,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:45,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:45,559 INFO L87 Difference]: Start difference. First operand 2512 states and 10792 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:46,225 INFO L93 Difference]: Finished difference Result 3043 states and 12775 transitions. [2021-06-12 20:37:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:37:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:46,231 INFO L225 Difference]: With dead ends: 3043 [2021-06-12 20:37:46,231 INFO L226 Difference]: Without dead ends: 3024 [2021-06-12 20:37:46,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:37:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-06-12 20:37:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2542. [2021-06-12 20:37:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 4.296733569460843) internal successors, (10918), 2541 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 10918 transitions. [2021-06-12 20:37:46,282 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 10918 transitions. Word has length 29 [2021-06-12 20:37:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:46,282 INFO L482 AbstractCegarLoop]: Abstraction has 2542 states and 10918 transitions. [2021-06-12 20:37:46,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 10918 transitions. [2021-06-12 20:37:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:46,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:46,286 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:46,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 20:37:46,489 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash 555510786, now seen corresponding path program 3 times [2021-06-12 20:37:46,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:46,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692601407] [2021-06-12 20:37:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:46,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:46,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692601407] [2021-06-12 20:37:46,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692601407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:46,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474885324] [2021-06-12 20:37:46,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:46,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:46,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:46,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:37:46,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:46,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:46,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:46,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:37:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:46,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474885324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:46,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:46,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:37:46,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388057582] [2021-06-12 20:37:46,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:46,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:46,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:46,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:46,816 INFO L87 Difference]: Start difference. First operand 2542 states and 10918 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:47,480 INFO L93 Difference]: Finished difference Result 3597 states and 14864 transitions. [2021-06-12 20:37:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:47,488 INFO L225 Difference]: With dead ends: 3597 [2021-06-12 20:37:47,488 INFO L226 Difference]: Without dead ends: 3559 [2021-06-12 20:37:47,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:37:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-06-12 20:37:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2634. [2021-06-12 20:37:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 4.295860235472845) internal successors, (11311), 2633 states have internal predecessors, (11311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 11311 transitions. [2021-06-12 20:37:47,528 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 11311 transitions. Word has length 29 [2021-06-12 20:37:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:47,528 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 11311 transitions. [2021-06-12 20:37:47,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 11311 transitions. [2021-06-12 20:37:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:47,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:47,531 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 20:37:47,732 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1977865612, now seen corresponding path program 4 times [2021-06-12 20:37:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512604637] [2021-06-12 20:37:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:47,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512604637] [2021-06-12 20:37:47,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512604637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551458474] [2021-06-12 20:37:47,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:47,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:47,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:47,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:47,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:47,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:47,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:37:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:47,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551458474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:47,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:47,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 20:37:47,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441407437] [2021-06-12 20:37:47,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:47,935 INFO L87 Difference]: Start difference. First operand 2634 states and 11311 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:48,173 INFO L93 Difference]: Finished difference Result 3229 states and 13604 transitions. [2021-06-12 20:37:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:48,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:48,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:48,180 INFO L225 Difference]: With dead ends: 3229 [2021-06-12 20:37:48,180 INFO L226 Difference]: Without dead ends: 3198 [2021-06-12 20:37:48,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-06-12 20:37:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2494. [2021-06-12 20:37:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 4.30365022061773) internal successors, (10729), 2493 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 10729 transitions. [2021-06-12 20:37:48,238 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 10729 transitions. Word has length 29 [2021-06-12 20:37:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:48,238 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 10729 transitions. [2021-06-12 20:37:48,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 10729 transitions. [2021-06-12 20:37:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:48,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:48,242 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:48,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 20:37:48,442 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 6 times [2021-06-12 20:37:48,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:48,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017856322] [2021-06-12 20:37:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:48,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:48,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017856322] [2021-06-12 20:37:48,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017856322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:48,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022243118] [2021-06-12 20:37:48,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:48,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:48,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:37:48,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:48,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:48,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:48,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:48,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:48,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:48,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-12 20:37:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022243118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:48,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:48,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:37:48,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121765880] [2021-06-12 20:37:48,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:37:48,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:48,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:37:48,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:48,757 INFO L87 Difference]: Start difference. First operand 2494 states and 10729 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:49,490 INFO L93 Difference]: Finished difference Result 3192 states and 13404 transitions. [2021-06-12 20:37:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:37:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:49,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:49,498 INFO L225 Difference]: With dead ends: 3192 [2021-06-12 20:37:49,499 INFO L226 Difference]: Without dead ends: 3173 [2021-06-12 20:37:49,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:37:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2021-06-12 20:37:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 2594. [2021-06-12 20:37:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 4.304280755881218) internal successors, (11161), 2593 states have internal predecessors, (11161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 11161 transitions. [2021-06-12 20:37:49,537 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 11161 transitions. Word has length 29 [2021-06-12 20:37:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:49,538 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 11161 transitions. [2021-06-12 20:37:49,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 11161 transitions. [2021-06-12 20:37:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:49,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:49,541 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:49,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:49,742 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:49,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 7 times [2021-06-12 20:37:49,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:49,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110313514] [2021-06-12 20:37:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:49,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:49,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110313514] [2021-06-12 20:37:49,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110313514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:49,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943691210] [2021-06-12 20:37:49,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:49,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:49,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:49,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:49,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:49,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:49,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:49,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943691210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:49,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:49,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 20:37:49,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747259764] [2021-06-12 20:37:49,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:37:49,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:49,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:37:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:49,989 INFO L87 Difference]: Start difference. First operand 2594 states and 11161 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:50,161 INFO L93 Difference]: Finished difference Result 3054 states and 12848 transitions. [2021-06-12 20:37:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:50,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:50,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:50,167 INFO L225 Difference]: With dead ends: 3054 [2021-06-12 20:37:50,167 INFO L226 Difference]: Without dead ends: 3039 [2021-06-12 20:37:50,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-06-12 20:37:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2606. [2021-06-12 20:37:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 4.29827255278311) internal successors, (11197), 2605 states have internal predecessors, (11197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 11197 transitions. [2021-06-12 20:37:50,220 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 11197 transitions. Word has length 29 [2021-06-12 20:37:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:50,220 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 11197 transitions. [2021-06-12 20:37:50,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 11197 transitions. [2021-06-12 20:37:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:50,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:50,223 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:50,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:50,434 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 8 times [2021-06-12 20:37:50,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:50,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087154649] [2021-06-12 20:37:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:50,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087154649] [2021-06-12 20:37:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087154649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:50,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466069953] [2021-06-12 20:37:50,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:50,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:50,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:50,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:50,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:50,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:50,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:50,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:50,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466069953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:50,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:50,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:37:50,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808121991] [2021-06-12 20:37:50,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:50,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:50,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:50,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:50,826 INFO L87 Difference]: Start difference. First operand 2606 states and 11197 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:51,449 INFO L93 Difference]: Finished difference Result 2958 states and 12432 transitions. [2021-06-12 20:37:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:51,455 INFO L225 Difference]: With dead ends: 2958 [2021-06-12 20:37:51,455 INFO L226 Difference]: Without dead ends: 2944 [2021-06-12 20:37:51,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:37:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-06-12 20:37:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2599. [2021-06-12 20:37:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 4.300615858352579) internal successors, (11173), 2598 states have internal predecessors, (11173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 11173 transitions. [2021-06-12 20:37:51,493 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 11173 transitions. Word has length 29 [2021-06-12 20:37:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:51,493 INFO L482 AbstractCegarLoop]: Abstraction has 2599 states and 11173 transitions. [2021-06-12 20:37:51,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 11173 transitions. [2021-06-12 20:37:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:51,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:51,497 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:51,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:51,697 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 9 times [2021-06-12 20:37:51,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:51,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238264218] [2021-06-12 20:37:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:51,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:51,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238264218] [2021-06-12 20:37:51,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238264218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:51,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932874811] [2021-06-12 20:37:51,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:51,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:51,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:51,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:37:51,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:51,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:51,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:51,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:51,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:51,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:51,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-12 20:37:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:52,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932874811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:52,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:52,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:37:52,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109343598] [2021-06-12 20:37:52,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:52,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:52,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:52,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:52,022 INFO L87 Difference]: Start difference. First operand 2599 states and 11173 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:52,522 INFO L93 Difference]: Finished difference Result 3121 states and 13032 transitions. [2021-06-12 20:37:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:37:52,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:52,529 INFO L225 Difference]: With dead ends: 3121 [2021-06-12 20:37:52,529 INFO L226 Difference]: Without dead ends: 3098 [2021-06-12 20:37:52,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:37:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-06-12 20:37:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2536. [2021-06-12 20:37:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 4.297435897435897) internal successors, (10894), 2535 states have internal predecessors, (10894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 10894 transitions. [2021-06-12 20:37:52,564 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 10894 transitions. Word has length 29 [2021-06-12 20:37:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:52,564 INFO L482 AbstractCegarLoop]: Abstraction has 2536 states and 10894 transitions. [2021-06-12 20:37:52,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 10894 transitions. [2021-06-12 20:37:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:52,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:52,567 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:52,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-12 20:37:52,769 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 10 times [2021-06-12 20:37:52,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:52,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372375454] [2021-06-12 20:37:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:52,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:52,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372375454] [2021-06-12 20:37:52,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372375454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:52,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334919693] [2021-06-12 20:37:52,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:52,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:52,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:53,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:53,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:37:53,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:53,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:53,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:53,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-12 20:37:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:53,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334919693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:53,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:53,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:37:53,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630495795] [2021-06-12 20:37:53,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:53,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:53,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:53,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:53,088 INFO L87 Difference]: Start difference. First operand 2536 states and 10894 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:53,295 INFO L93 Difference]: Finished difference Result 2645 states and 11262 transitions. [2021-06-12 20:37:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:53,301 INFO L225 Difference]: With dead ends: 2645 [2021-06-12 20:37:53,301 INFO L226 Difference]: Without dead ends: 2630 [2021-06-12 20:37:53,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:53,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-06-12 20:37:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2536. [2021-06-12 20:37:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 4.297435897435897) internal successors, (10894), 2535 states have internal predecessors, (10894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 10894 transitions. [2021-06-12 20:37:53,333 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 10894 transitions. Word has length 29 [2021-06-12 20:37:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:53,333 INFO L482 AbstractCegarLoop]: Abstraction has 2536 states and 10894 transitions. [2021-06-12 20:37:53,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 10894 transitions. [2021-06-12 20:37:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:53,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:53,337 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:53,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:53,538 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 11 times [2021-06-12 20:37:53,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:53,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135993771] [2021-06-12 20:37:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:53,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:53,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135993771] [2021-06-12 20:37:53,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135993771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:53,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562542175] [2021-06-12 20:37:53,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:53,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:53,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:53,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:53,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:37:53,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:53,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:53,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:53,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-12 20:37:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:53,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562542175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:53,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:53,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 20:37:53,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372982420] [2021-06-12 20:37:53,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:37:53,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:53,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:37:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:53,815 INFO L87 Difference]: Start difference. First operand 2536 states and 10894 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:54,014 INFO L93 Difference]: Finished difference Result 2988 states and 12674 transitions. [2021-06-12 20:37:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:54,020 INFO L225 Difference]: With dead ends: 2988 [2021-06-12 20:37:54,020 INFO L226 Difference]: Without dead ends: 2974 [2021-06-12 20:37:54,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2021-06-12 20:37:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2524. [2021-06-12 20:37:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 4.303606817281015) internal successors, (10858), 2523 states have internal predecessors, (10858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 10858 transitions. [2021-06-12 20:37:54,059 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 10858 transitions. Word has length 29 [2021-06-12 20:37:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:54,059 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 10858 transitions. [2021-06-12 20:37:54,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 10858 transitions. [2021-06-12 20:37:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:54,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:54,063 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:54,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:54,265 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 12 times [2021-06-12 20:37:54,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:54,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247907710] [2021-06-12 20:37:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:54,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:54,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247907710] [2021-06-12 20:37:54,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247907710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:54,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590642596] [2021-06-12 20:37:54,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:54,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:54,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:54,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:54,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:54,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:54,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:54,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:54,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:54,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590642596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:54,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:54,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:37:54,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566162295] [2021-06-12 20:37:54,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:37:54,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:37:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:54,625 INFO L87 Difference]: Start difference. First operand 2524 states and 10858 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:55,420 INFO L93 Difference]: Finished difference Result 3051 states and 12761 transitions. [2021-06-12 20:37:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:37:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:55,427 INFO L225 Difference]: With dead ends: 3051 [2021-06-12 20:37:55,427 INFO L226 Difference]: Without dead ends: 3032 [2021-06-12 20:37:55,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:37:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-12 20:37:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2621. [2021-06-12 20:37:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 4.3080152671755725) internal successors, (11287), 2620 states have internal predecessors, (11287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11287 transitions. [2021-06-12 20:37:55,466 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11287 transitions. Word has length 29 [2021-06-12 20:37:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:55,466 INFO L482 AbstractCegarLoop]: Abstraction has 2621 states and 11287 transitions. [2021-06-12 20:37:55,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11287 transitions. [2021-06-12 20:37:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:55,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:55,470 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:55,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:55,671 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 13 times [2021-06-12 20:37:55,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:55,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990700383] [2021-06-12 20:37:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:55,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:55,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990700383] [2021-06-12 20:37:55,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990700383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:55,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398873112] [2021-06-12 20:37:55,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:55,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:55,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:55,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:55,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:55,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:55,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:55,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398873112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:55,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:55,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 20:37:55,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090043683] [2021-06-12 20:37:55,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:37:55,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:55,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:37:55,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:55,959 INFO L87 Difference]: Start difference. First operand 2621 states and 11287 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:56,203 INFO L93 Difference]: Finished difference Result 3084 states and 13046 transitions. [2021-06-12 20:37:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:56,209 INFO L225 Difference]: With dead ends: 3084 [2021-06-12 20:37:56,209 INFO L226 Difference]: Without dead ends: 3069 [2021-06-12 20:37:56,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-12 20:37:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2633. [2021-06-12 20:37:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2632 states have (on average 4.302431610942249) internal successors, (11324), 2632 states have internal predecessors, (11324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 11324 transitions. [2021-06-12 20:37:56,246 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 11324 transitions. Word has length 29 [2021-06-12 20:37:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:56,246 INFO L482 AbstractCegarLoop]: Abstraction has 2633 states and 11324 transitions. [2021-06-12 20:37:56,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 11324 transitions. [2021-06-12 20:37:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:56,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:56,249 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:56,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 20:37:56,450 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 14 times [2021-06-12 20:37:56,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:56,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765249608] [2021-06-12 20:37:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:56,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765249608] [2021-06-12 20:37:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765249608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:56,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493352526] [2021-06-12 20:37:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:56,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:56,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:56,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:56,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:56,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:56,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:56,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:56,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493352526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:56,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:56,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:37:56,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391595504] [2021-06-12 20:37:56,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:56,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:56,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:56,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:56,779 INFO L87 Difference]: Start difference. First operand 2633 states and 11324 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:57,440 INFO L93 Difference]: Finished difference Result 3046 states and 12754 transitions. [2021-06-12 20:37:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:37:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:57,448 INFO L225 Difference]: With dead ends: 3046 [2021-06-12 20:37:57,449 INFO L226 Difference]: Without dead ends: 3032 [2021-06-12 20:37:57,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 613.2ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:37:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-12 20:37:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2626. [2021-06-12 20:37:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 4.304761904761905) internal successors, (11300), 2625 states have internal predecessors, (11300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 11300 transitions. [2021-06-12 20:37:57,499 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 11300 transitions. Word has length 29 [2021-06-12 20:37:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:57,499 INFO L482 AbstractCegarLoop]: Abstraction has 2626 states and 11300 transitions. [2021-06-12 20:37:57,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 11300 transitions. [2021-06-12 20:37:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:57,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:57,503 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:57,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:57,709 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 15 times [2021-06-12 20:37:57,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:57,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698809640] [2021-06-12 20:37:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:57,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:57,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698809640] [2021-06-12 20:37:57,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698809640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:57,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65976887] [2021-06-12 20:37:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:57,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:37:57,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:57,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:57,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:57,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:57,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:57,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:57,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:57,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:57,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:58,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65976887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:58,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:58,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:37:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065617178] [2021-06-12 20:37:58,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:37:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:58,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:37:58,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:58,066 INFO L87 Difference]: Start difference. First operand 2626 states and 11300 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:58,683 INFO L93 Difference]: Finished difference Result 3014 states and 12683 transitions. [2021-06-12 20:37:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:37:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:58,689 INFO L225 Difference]: With dead ends: 3014 [2021-06-12 20:37:58,689 INFO L226 Difference]: Without dead ends: 2991 [2021-06-12 20:37:58,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 561.3ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:37:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-12 20:37:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2554. [2021-06-12 20:37:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 4.306306306306307) internal successors, (10994), 2553 states have internal predecessors, (10994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 10994 transitions. [2021-06-12 20:37:58,723 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 10994 transitions. Word has length 29 [2021-06-12 20:37:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:58,723 INFO L482 AbstractCegarLoop]: Abstraction has 2554 states and 10994 transitions. [2021-06-12 20:37:58,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 10994 transitions. [2021-06-12 20:37:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:58,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:58,727 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:58,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:58,928 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:58,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 16 times [2021-06-12 20:37:58,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:58,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925509224] [2021-06-12 20:37:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:59,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925509224] [2021-06-12 20:37:59,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925509224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875975446] [2021-06-12 20:37:59,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:59,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:59,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:59,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:59,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:59,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:59,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:59,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:59,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:59,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:37:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:59,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875975446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:59,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:59,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:37:59,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348779101] [2021-06-12 20:37:59,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:59,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:59,228 INFO L87 Difference]: Start difference. First operand 2554 states and 10994 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:59,425 INFO L93 Difference]: Finished difference Result 2689 states and 11475 transitions. [2021-06-12 20:37:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:59,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:37:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:59,430 INFO L225 Difference]: With dead ends: 2689 [2021-06-12 20:37:59,430 INFO L226 Difference]: Without dead ends: 2670 [2021-06-12 20:37:59,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-06-12 20:37:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2554. [2021-06-12 20:37:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 4.306306306306307) internal successors, (10994), 2553 states have internal predecessors, (10994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 10994 transitions. [2021-06-12 20:37:59,463 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 10994 transitions. Word has length 29 [2021-06-12 20:37:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:59,463 INFO L482 AbstractCegarLoop]: Abstraction has 2554 states and 10994 transitions. [2021-06-12 20:37:59,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 10994 transitions. [2021-06-12 20:37:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:37:59,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:59,467 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:59,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 20:37:59,668 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:59,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 17 times [2021-06-12 20:37:59,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:59,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978120176] [2021-06-12 20:37:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:59,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:59,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978120176] [2021-06-12 20:37:59,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978120176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:59,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560726808] [2021-06-12 20:37:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:59,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:59,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:37:59,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:59,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:59,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:59,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:59,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:59,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-12 20:37:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560726808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:59,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:59,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 20:37:59,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814281953] [2021-06-12 20:37:59,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:37:59,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:59,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:37:59,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:59,987 INFO L87 Difference]: Start difference. First operand 2554 states and 10994 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:00,185 INFO L93 Difference]: Finished difference Result 3041 states and 12849 transitions. [2021-06-12 20:38:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:38:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:00,191 INFO L225 Difference]: With dead ends: 3041 [2021-06-12 20:38:00,192 INFO L226 Difference]: Without dead ends: 3018 [2021-06-12 20:38:00,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:38:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-06-12 20:38:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 2524. [2021-06-12 20:38:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 4.303606817281015) internal successors, (10858), 2523 states have internal predecessors, (10858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 10858 transitions. [2021-06-12 20:38:00,227 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 10858 transitions. Word has length 29 [2021-06-12 20:38:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:00,227 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 10858 transitions. [2021-06-12 20:38:00,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 10858 transitions. [2021-06-12 20:38:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:00,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:00,231 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:00,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:00,431 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-06-12 20:38:00,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:00,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821817881] [2021-06-12 20:38:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:00,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:00,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821817881] [2021-06-12 20:38:00,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821817881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:00,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532091623] [2021-06-12 20:38:00,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:00,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:00,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:00,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:00,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:00,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:00,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:00,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:38:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:00,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532091623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:00,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:00,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:38:00,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380467203] [2021-06-12 20:38:00,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:38:00,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:38:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:38:00,729 INFO L87 Difference]: Start difference. First operand 2524 states and 10858 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:01,018 INFO L93 Difference]: Finished difference Result 3131 states and 13228 transitions. [2021-06-12 20:38:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:38:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:01,025 INFO L225 Difference]: With dead ends: 3131 [2021-06-12 20:38:01,025 INFO L226 Difference]: Without dead ends: 3112 [2021-06-12 20:38:01,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:38:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-12 20:38:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2655. [2021-06-12 20:38:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 4.2991710625470985) internal successors, (11410), 2654 states have internal predecessors, (11410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 11410 transitions. [2021-06-12 20:38:01,065 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 11410 transitions. Word has length 29 [2021-06-12 20:38:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:01,065 INFO L482 AbstractCegarLoop]: Abstraction has 2655 states and 11410 transitions. [2021-06-12 20:38:01,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 11410 transitions. [2021-06-12 20:38:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:01,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:01,069 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:01,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:01,270 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-06-12 20:38:01,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:01,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150403589] [2021-06-12 20:38:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:01,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:01,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150403589] [2021-06-12 20:38:01,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150403589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:01,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437816886] [2021-06-12 20:38:01,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:01,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:01,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:01,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:38:01,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:01,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:01,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:01,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:01,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:01,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:01,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-12 20:38:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:01,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437816886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:01,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:01,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 20:38:01,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327549754] [2021-06-12 20:38:01,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:38:01,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:38:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:01,754 INFO L87 Difference]: Start difference. First operand 2655 states and 11410 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:02,195 INFO L93 Difference]: Finished difference Result 3482 states and 14542 transitions. [2021-06-12 20:38:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:38:02,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:02,203 INFO L225 Difference]: With dead ends: 3482 [2021-06-12 20:38:02,203 INFO L226 Difference]: Without dead ends: 3451 [2021-06-12 20:38:02,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:38:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2021-06-12 20:38:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 2563. [2021-06-12 20:38:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 4.30015612802498) internal successors, (11017), 2562 states have internal predecessors, (11017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 11017 transitions. [2021-06-12 20:38:02,247 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 11017 transitions. Word has length 29 [2021-06-12 20:38:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:02,247 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 11017 transitions. [2021-06-12 20:38:02,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:02,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 11017 transitions. [2021-06-12 20:38:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:02,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:02,253 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:02,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:02,454 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:02,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-06-12 20:38:02,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:02,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297483049] [2021-06-12 20:38:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:02,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:02,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297483049] [2021-06-12 20:38:02,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297483049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:02,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192194803] [2021-06-12 20:38:02,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:02,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:02,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:02,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:02,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:02,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:02,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:02,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:38:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:02,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192194803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:02,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:02,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:38:02,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741486566] [2021-06-12 20:38:02,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:38:02,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:02,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:38:02,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:38:02,713 INFO L87 Difference]: Start difference. First operand 2563 states and 11017 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:02,994 INFO L93 Difference]: Finished difference Result 2681 states and 11419 transitions. [2021-06-12 20:38:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:38:02,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:03,000 INFO L225 Difference]: With dead ends: 2681 [2021-06-12 20:38:03,000 INFO L226 Difference]: Without dead ends: 2666 [2021-06-12 20:38:03,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:38:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-12 20:38:03,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2539. [2021-06-12 20:38:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 4.301812450748621) internal successors, (10918), 2538 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 10918 transitions. [2021-06-12 20:38:03,033 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 10918 transitions. Word has length 29 [2021-06-12 20:38:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:03,033 INFO L482 AbstractCegarLoop]: Abstraction has 2539 states and 10918 transitions. [2021-06-12 20:38:03,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 10918 transitions. [2021-06-12 20:38:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:03,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:03,036 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:03,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:03,237 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-06-12 20:38:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:03,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109983349] [2021-06-12 20:38:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:03,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:03,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109983349] [2021-06-12 20:38:03,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109983349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:03,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796619682] [2021-06-12 20:38:03,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:03,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:03,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:03,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:03,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:03,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:03,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:03,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:38:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796619682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:03,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:03,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:38:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293403109] [2021-06-12 20:38:03,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:38:03,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:38:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:03,567 INFO L87 Difference]: Start difference. First operand 2539 states and 10918 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:04,600 INFO L93 Difference]: Finished difference Result 3321 states and 13753 transitions. [2021-06-12 20:38:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:38:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:04,607 INFO L225 Difference]: With dead ends: 3321 [2021-06-12 20:38:04,608 INFO L226 Difference]: Without dead ends: 3275 [2021-06-12 20:38:04,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:38:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-06-12 20:38:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 2683. [2021-06-12 20:38:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2682 states have (on average 4.281506338553318) internal successors, (11483), 2682 states have internal predecessors, (11483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 11483 transitions. [2021-06-12 20:38:04,647 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 11483 transitions. Word has length 29 [2021-06-12 20:38:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:04,647 INFO L482 AbstractCegarLoop]: Abstraction has 2683 states and 11483 transitions. [2021-06-12 20:38:04,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 11483 transitions. [2021-06-12 20:38:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:04,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:04,651 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:04,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:04,852 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:04,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-06-12 20:38:04,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:04,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579632987] [2021-06-12 20:38:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:05,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579632987] [2021-06-12 20:38:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579632987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145866643] [2021-06-12 20:38:05,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:05,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:05,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:38:05,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:05,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:05,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:05,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:05,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:05,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:05,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-12 20:38:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145866643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:05,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:05,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 20:38:05,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345354939] [2021-06-12 20:38:05,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:38:05,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:38:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:05,276 INFO L87 Difference]: Start difference. First operand 2683 states and 11483 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:05,706 INFO L93 Difference]: Finished difference Result 3482 states and 14556 transitions. [2021-06-12 20:38:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:38:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:05,712 INFO L225 Difference]: With dead ends: 3482 [2021-06-12 20:38:05,712 INFO L226 Difference]: Without dead ends: 3409 [2021-06-12 20:38:05,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:38:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-06-12 20:38:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2623. [2021-06-12 20:38:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 4.302440884820747) internal successors, (11281), 2622 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 11281 transitions. [2021-06-12 20:38:05,750 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 11281 transitions. Word has length 29 [2021-06-12 20:38:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:05,750 INFO L482 AbstractCegarLoop]: Abstraction has 2623 states and 11281 transitions. [2021-06-12 20:38:05,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 11281 transitions. [2021-06-12 20:38:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:05,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:05,754 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:05,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:05,955 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:05,955 INFO L82 PathProgramCache]: Analyzing trace with hash 794590770, now seen corresponding path program 10 times [2021-06-12 20:38:05,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:05,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211796386] [2021-06-12 20:38:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:06,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:06,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211796386] [2021-06-12 20:38:06,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211796386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:06,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620251210] [2021-06-12 20:38:06,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:06,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:06,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:06,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:06,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:06,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:06,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:06,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:06,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:38:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:06,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620251210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:06,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:06,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 20:38:06,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434903963] [2021-06-12 20:38:06,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:38:06,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:38:06,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:38:06,206 INFO L87 Difference]: Start difference. First operand 2623 states and 11281 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:06,451 INFO L93 Difference]: Finished difference Result 2767 states and 11771 transitions. [2021-06-12 20:38:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:38:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:06,457 INFO L225 Difference]: With dead ends: 2767 [2021-06-12 20:38:06,457 INFO L226 Difference]: Without dead ends: 2748 [2021-06-12 20:38:06,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-06-12 20:38:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2620. [2021-06-12 20:38:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 4.30393279877816) internal successors, (11272), 2619 states have internal predecessors, (11272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 11272 transitions. [2021-06-12 20:38:06,491 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 11272 transitions. Word has length 29 [2021-06-12 20:38:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:06,491 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 11272 transitions. [2021-06-12 20:38:06,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 11272 transitions. [2021-06-12 20:38:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:06,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:06,495 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:06,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 20:38:06,695 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:06,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 18 times [2021-06-12 20:38:06,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:06,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859177808] [2021-06-12 20:38:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:06,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859177808] [2021-06-12 20:38:06,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859177808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731555640] [2021-06-12 20:38:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:06,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:38:06,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:06,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:06,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:06,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:06,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:06,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:06,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:38:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:06,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731555640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:06,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:06,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:38:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706807122] [2021-06-12 20:38:06,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:38:06,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:38:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:06,989 INFO L87 Difference]: Start difference. First operand 2620 states and 11272 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:07,428 INFO L93 Difference]: Finished difference Result 3193 states and 13486 transitions. [2021-06-12 20:38:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:38:07,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:07,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:07,434 INFO L225 Difference]: With dead ends: 3193 [2021-06-12 20:38:07,434 INFO L226 Difference]: Without dead ends: 3174 [2021-06-12 20:38:07,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-12 20:38:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2728. [2021-06-12 20:38:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2727 states have (on average 4.3032636596993035) internal successors, (11735), 2727 states have internal predecessors, (11735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 11735 transitions. [2021-06-12 20:38:07,472 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 11735 transitions. Word has length 29 [2021-06-12 20:38:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:07,472 INFO L482 AbstractCegarLoop]: Abstraction has 2728 states and 11735 transitions. [2021-06-12 20:38:07,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 11735 transitions. [2021-06-12 20:38:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:07,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:07,476 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:07,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:07,676 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:07,676 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 19 times [2021-06-12 20:38:07,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:07,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965217131] [2021-06-12 20:38:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:07,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965217131] [2021-06-12 20:38:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965217131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591636623] [2021-06-12 20:38:07,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:07,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:07,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:07,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:07,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:07,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:07,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:07,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-12 20:38:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:07,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591636623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:07,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:07,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-12 20:38:07,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222460149] [2021-06-12 20:38:07,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:38:07,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:38:07,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:38:07,915 INFO L87 Difference]: Start difference. First operand 2728 states and 11735 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:08,124 INFO L93 Difference]: Finished difference Result 3118 states and 13129 transitions. [2021-06-12 20:38:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:38:08,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:08,130 INFO L225 Difference]: With dead ends: 3118 [2021-06-12 20:38:08,130 INFO L226 Difference]: Without dead ends: 3032 [2021-06-12 20:38:08,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:38:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-12 20:38:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2691. [2021-06-12 20:38:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 4.307434944237918) internal successors, (11587), 2690 states have internal predecessors, (11587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 11587 transitions. [2021-06-12 20:38:08,168 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 11587 transitions. Word has length 29 [2021-06-12 20:38:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:08,168 INFO L482 AbstractCegarLoop]: Abstraction has 2691 states and 11587 transitions. [2021-06-12 20:38:08,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 11587 transitions. [2021-06-12 20:38:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:08,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:08,172 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:08,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-12 20:38:08,373 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 20 times [2021-06-12 20:38:08,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:08,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770246678] [2021-06-12 20:38:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:08,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:08,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770246678] [2021-06-12 20:38:08,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770246678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:08,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730995398] [2021-06-12 20:38:08,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:08,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:08,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:08,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:08,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:08,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:08,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:08,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:38:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:08,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730995398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:08,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:38:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074193085] [2021-06-12 20:38:08,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:38:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:38:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:08,732 INFO L87 Difference]: Start difference. First operand 2691 states and 11587 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:09,263 INFO L93 Difference]: Finished difference Result 2858 states and 12147 transitions. [2021-06-12 20:38:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:38:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:09,269 INFO L225 Difference]: With dead ends: 2858 [2021-06-12 20:38:09,269 INFO L226 Difference]: Without dead ends: 2843 [2021-06-12 20:38:09,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:38:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2021-06-12 20:38:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2688. [2021-06-12 20:38:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 4.308894678079643) internal successors, (11578), 2687 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 11578 transitions. [2021-06-12 20:38:09,302 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 11578 transitions. Word has length 29 [2021-06-12 20:38:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:09,302 INFO L482 AbstractCegarLoop]: Abstraction has 2688 states and 11578 transitions. [2021-06-12 20:38:09,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 11578 transitions. [2021-06-12 20:38:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:09,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:09,305 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:09,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 20:38:09,506 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 21 times [2021-06-12 20:38:09,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:09,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320786676] [2021-06-12 20:38:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:09,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:09,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320786676] [2021-06-12 20:38:09,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320786676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:09,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103616205] [2021-06-12 20:38:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:09,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:38:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:09,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:09,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:09,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:09,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:09,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:09,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-12 20:38:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:09,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103616205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:09,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:09,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-12 20:38:09,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233854012] [2021-06-12 20:38:09,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:38:09,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:09,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:38:09,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:09,756 INFO L87 Difference]: Start difference. First operand 2688 states and 11578 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:10,212 INFO L93 Difference]: Finished difference Result 3616 states and 15137 transitions. [2021-06-12 20:38:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:38:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:10,221 INFO L225 Difference]: With dead ends: 3616 [2021-06-12 20:38:10,221 INFO L226 Difference]: Without dead ends: 3597 [2021-06-12 20:38:10,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 396.9ms TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:38:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-06-12 20:38:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2790. [2021-06-12 20:38:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 4.310864108999642) internal successors, (12023), 2789 states have internal predecessors, (12023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 12023 transitions. [2021-06-12 20:38:10,264 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 12023 transitions. Word has length 29 [2021-06-12 20:38:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:10,265 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 12023 transitions. [2021-06-12 20:38:10,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 12023 transitions. [2021-06-12 20:38:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:10,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:10,269 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:10,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:10,470 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:10,470 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 22 times [2021-06-12 20:38:10,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:10,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569433668] [2021-06-12 20:38:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:10,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:10,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569433668] [2021-06-12 20:38:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569433668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:10,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548598123] [2021-06-12 20:38:10,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:10,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:10,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:10,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:10,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:10,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:10,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:10,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-06-12 20:38:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:10,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548598123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:10,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:10,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-12 20:38:10,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269645560] [2021-06-12 20:38:10,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:38:10,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:10,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:38:10,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:38:10,688 INFO L87 Difference]: Start difference. First operand 2790 states and 12023 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:10,945 INFO L93 Difference]: Finished difference Result 3192 states and 13469 transitions. [2021-06-12 20:38:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:38:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:10,953 INFO L225 Difference]: With dead ends: 3192 [2021-06-12 20:38:10,953 INFO L226 Difference]: Without dead ends: 3112 [2021-06-12 20:38:10,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:10,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-12 20:38:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2718. [2021-06-12 20:38:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 4.306956201693044) internal successors, (11702), 2717 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11702 transitions. [2021-06-12 20:38:10,992 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11702 transitions. Word has length 29 [2021-06-12 20:38:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:10,992 INFO L482 AbstractCegarLoop]: Abstraction has 2718 states and 11702 transitions. [2021-06-12 20:38:10,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11702 transitions. [2021-06-12 20:38:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:10,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:10,996 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:11,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:11,196 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 23 times [2021-06-12 20:38:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:11,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555843494] [2021-06-12 20:38:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:11,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:11,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555843494] [2021-06-12 20:38:11,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555843494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:11,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065880770] [2021-06-12 20:38:11,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:11,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:11,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:11,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:11,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:11,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:11,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:11,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-12 20:38:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:11,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065880770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:11,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:11,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 20:38:11,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033740551] [2021-06-12 20:38:11,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:38:11,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:11,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:38:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:38:11,383 INFO L87 Difference]: Start difference. First operand 2718 states and 11702 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:11,526 INFO L93 Difference]: Finished difference Result 2847 states and 12154 transitions. [2021-06-12 20:38:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:38:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:11,532 INFO L225 Difference]: With dead ends: 2847 [2021-06-12 20:38:11,532 INFO L226 Difference]: Without dead ends: 2828 [2021-06-12 20:38:11,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:38:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-06-12 20:38:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2703. [2021-06-12 20:38:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 4.313471502590674) internal successors, (11655), 2702 states have internal predecessors, (11655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 11655 transitions. [2021-06-12 20:38:11,568 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 11655 transitions. Word has length 29 [2021-06-12 20:38:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:11,568 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 11655 transitions. [2021-06-12 20:38:11,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 11655 transitions. [2021-06-12 20:38:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:11,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:11,572 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:11,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:11,773 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-06-12 20:38:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:11,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600891589] [2021-06-12 20:38:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:11,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600891589] [2021-06-12 20:38:11,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600891589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002864841] [2021-06-12 20:38:11,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:11,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:38:11,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:11,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:11,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:38:11,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:11,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:11,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:11,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:38:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:12,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002864841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:12,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:12,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:38:12,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067383515] [2021-06-12 20:38:12,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:38:12,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:38:12,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:12,033 INFO L87 Difference]: Start difference. First operand 2703 states and 11655 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:12,432 INFO L93 Difference]: Finished difference Result 3325 states and 14048 transitions. [2021-06-12 20:38:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:38:12,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:12,440 INFO L225 Difference]: With dead ends: 3325 [2021-06-12 20:38:12,440 INFO L226 Difference]: Without dead ends: 3306 [2021-06-12 20:38:12,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-12 20:38:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2810. [2021-06-12 20:38:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2809 states have (on average 4.309718761124955) internal successors, (12106), 2809 states have internal predecessors, (12106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 12106 transitions. [2021-06-12 20:38:12,482 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 12106 transitions. Word has length 29 [2021-06-12 20:38:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:12,483 INFO L482 AbstractCegarLoop]: Abstraction has 2810 states and 12106 transitions. [2021-06-12 20:38:12,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 12106 transitions. [2021-06-12 20:38:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:12,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:12,487 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:12,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-12 20:38:12,687 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:12,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-06-12 20:38:12,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:12,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812597193] [2021-06-12 20:38:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:12,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:12,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812597193] [2021-06-12 20:38:12,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812597193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:12,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572491008] [2021-06-12 20:38:12,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:12,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:38:12,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:12,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:12,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:12,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:24 [2021-06-12 20:38:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572491008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-06-12 20:38:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155349170] [2021-06-12 20:38:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:38:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:38:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:38:12,928 INFO L87 Difference]: Start difference. First operand 2810 states and 12106 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:13,264 INFO L93 Difference]: Finished difference Result 3209 states and 13510 transitions. [2021-06-12 20:38:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:38:13,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:13,270 INFO L225 Difference]: With dead ends: 3209 [2021-06-12 20:38:13,271 INFO L226 Difference]: Without dead ends: 3123 [2021-06-12 20:38:13,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-12 20:38:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2738. [2021-06-12 20:38:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2737 states have (on average 4.309097552064304) internal successors, (11794), 2737 states have internal predecessors, (11794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 11794 transitions. [2021-06-12 20:38:13,309 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 11794 transitions. Word has length 29 [2021-06-12 20:38:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:13,309 INFO L482 AbstractCegarLoop]: Abstraction has 2738 states and 11794 transitions. [2021-06-12 20:38:13,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 11794 transitions. [2021-06-12 20:38:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:13,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:13,313 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:13,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:13,513 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-06-12 20:38:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:13,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300239049] [2021-06-12 20:38:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:13,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300239049] [2021-06-12 20:38:13,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300239049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156490181] [2021-06-12 20:38:13,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:13,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:13,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:13,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:13,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:13,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:38:13,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:13,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:13,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:13,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:38:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156490181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:13,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:13,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:38:13,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528721437] [2021-06-12 20:38:13,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:38:13,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:38:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:13,865 INFO L87 Difference]: Start difference. First operand 2738 states and 11794 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:14,376 INFO L93 Difference]: Finished difference Result 2966 states and 12573 transitions. [2021-06-12 20:38:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:38:14,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:14,382 INFO L225 Difference]: With dead ends: 2966 [2021-06-12 20:38:14,382 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 20:38:14,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 20:38:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2714. [2021-06-12 20:38:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 4.309620346479911) internal successors, (11692), 2713 states have internal predecessors, (11692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 11692 transitions. [2021-06-12 20:38:14,417 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 11692 transitions. Word has length 29 [2021-06-12 20:38:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:14,417 INFO L482 AbstractCegarLoop]: Abstraction has 2714 states and 11692 transitions. [2021-06-12 20:38:14,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 11692 transitions. [2021-06-12 20:38:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:14,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:14,421 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:14,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-12 20:38:14,621 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-06-12 20:38:14,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:14,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747498078] [2021-06-12 20:38:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:14,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747498078] [2021-06-12 20:38:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747498078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237129086] [2021-06-12 20:38:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:14,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:38:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:14,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:14,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-12 20:38:14,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:14,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:14,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:14,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-12 20:38:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:14,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237129086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:14,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:14,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:38:14,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695125723] [2021-06-12 20:38:14,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:38:14,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:14,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:38:14,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:14,935 INFO L87 Difference]: Start difference. First operand 2714 states and 11692 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:15,248 INFO L93 Difference]: Finished difference Result 2853 states and 12150 transitions. [2021-06-12 20:38:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:38:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:15,255 INFO L225 Difference]: With dead ends: 2853 [2021-06-12 20:38:15,255 INFO L226 Difference]: Without dead ends: 2838 [2021-06-12 20:38:15,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-12 20:38:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2722. [2021-06-12 20:38:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.305034913634693) internal successors, (11714), 2721 states have internal predecessors, (11714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11714 transitions. [2021-06-12 20:38:15,292 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11714 transitions. Word has length 29 [2021-06-12 20:38:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:15,292 INFO L482 AbstractCegarLoop]: Abstraction has 2722 states and 11714 transitions. [2021-06-12 20:38:15,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11714 transitions. [2021-06-12 20:38:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:15,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:15,296 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:15,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:15,497 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-06-12 20:38:15,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:15,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763895815] [2021-06-12 20:38:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:15,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:15,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763895815] [2021-06-12 20:38:15,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763895815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:15,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073982252] [2021-06-12 20:38:15,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:15,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:15,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:15,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:15,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:15,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:15,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-12 20:38:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:15,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073982252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:15,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:15,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:38:15,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049721579] [2021-06-12 20:38:15,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:38:15,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:38:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:38:15,771 INFO L87 Difference]: Start difference. First operand 2722 states and 11714 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:16,049 INFO L93 Difference]: Finished difference Result 3419 states and 14437 transitions. [2021-06-12 20:38:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:38:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:16,056 INFO L225 Difference]: With dead ends: 3419 [2021-06-12 20:38:16,056 INFO L226 Difference]: Without dead ends: 3400 [2021-06-12 20:38:16,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-06-12 20:38:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2857. [2021-06-12 20:38:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2856 states have (on average 4.2976190476190474) internal successors, (12274), 2856 states have internal predecessors, (12274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 12274 transitions. [2021-06-12 20:38:16,097 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 12274 transitions. Word has length 29 [2021-06-12 20:38:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:16,097 INFO L482 AbstractCegarLoop]: Abstraction has 2857 states and 12274 transitions. [2021-06-12 20:38:16,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 12274 transitions. [2021-06-12 20:38:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:16,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:16,103 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:16,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:16,317 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-06-12 20:38:16,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:16,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859980715] [2021-06-12 20:38:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:16,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859980715] [2021-06-12 20:38:16,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859980715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777028856] [2021-06-12 20:38:16,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:16,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:38:16,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:16,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:16,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:16,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-12 20:38:16,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:16,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:16,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:16,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-12 20:38:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:16,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777028856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:16,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:16,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 20:38:16,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309474999] [2021-06-12 20:38:16,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:38:16,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:16,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:38:16,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:16,632 INFO L87 Difference]: Start difference. First operand 2857 states and 12274 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:17,298 INFO L93 Difference]: Finished difference Result 3478 states and 14599 transitions. [2021-06-12 20:38:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:38:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:17,305 INFO L225 Difference]: With dead ends: 3478 [2021-06-12 20:38:17,305 INFO L226 Difference]: Without dead ends: 3447 [2021-06-12 20:38:17,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:38:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-06-12 20:38:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2777. [2021-06-12 20:38:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 4.30007204610951) internal successors, (11937), 2776 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 11937 transitions. [2021-06-12 20:38:17,343 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 11937 transitions. Word has length 29 [2021-06-12 20:38:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:17,343 INFO L482 AbstractCegarLoop]: Abstraction has 2777 states and 11937 transitions. [2021-06-12 20:38:17,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 11937 transitions. [2021-06-12 20:38:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:17,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:17,347 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:17,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 20:38:17,548 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-06-12 20:38:17,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:17,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208216914] [2021-06-12 20:38:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:17,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208216914] [2021-06-12 20:38:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208216914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595752075] [2021-06-12 20:38:17,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:17,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:17,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:17,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:38:17,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:17,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:17,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:17,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-12 20:38:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:17,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595752075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:17,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:17,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:38:17,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453463105] [2021-06-12 20:38:17,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:38:17,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:38:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:38:17,803 INFO L87 Difference]: Start difference. First operand 2777 states and 11937 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:18,044 INFO L93 Difference]: Finished difference Result 2968 states and 12609 transitions. [2021-06-12 20:38:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:38:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:18,050 INFO L225 Difference]: With dead ends: 2968 [2021-06-12 20:38:18,050 INFO L226 Difference]: Without dead ends: 2953 [2021-06-12 20:38:18,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:38:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-06-12 20:38:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2765. [2021-06-12 20:38:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 4.3035455861070915) internal successors, (11895), 2764 states have internal predecessors, (11895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 11895 transitions. [2021-06-12 20:38:18,087 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 11895 transitions. Word has length 29 [2021-06-12 20:38:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:18,088 INFO L482 AbstractCegarLoop]: Abstraction has 2765 states and 11895 transitions. [2021-06-12 20:38:18,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 11895 transitions. [2021-06-12 20:38:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:18,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:18,091 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:18,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 20:38:18,292 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-06-12 20:38:18,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:18,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336337827] [2021-06-12 20:38:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:18,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336337827] [2021-06-12 20:38:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336337827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986964016] [2021-06-12 20:38:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:18,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:18,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:18,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:18,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-12 20:38:18,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:18,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:18,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:18,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-12 20:38:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:18,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986964016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:18,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:18,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:38:18,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97502469] [2021-06-12 20:38:18,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:38:18,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:38:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:18,616 INFO L87 Difference]: Start difference. First operand 2765 states and 11895 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:18,975 INFO L93 Difference]: Finished difference Result 2909 states and 12388 transitions. [2021-06-12 20:38:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:38:18,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:18,982 INFO L225 Difference]: With dead ends: 2909 [2021-06-12 20:38:18,982 INFO L226 Difference]: Without dead ends: 2894 [2021-06-12 20:38:18,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-06-12 20:38:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2755. [2021-06-12 20:38:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2754 states have (on average 4.307552650689906) internal successors, (11863), 2754 states have internal predecessors, (11863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 11863 transitions. [2021-06-12 20:38:19,041 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 11863 transitions. Word has length 29 [2021-06-12 20:38:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:19,041 INFO L482 AbstractCegarLoop]: Abstraction has 2755 states and 11863 transitions. [2021-06-12 20:38:19,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 11863 transitions. [2021-06-12 20:38:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:19,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:19,045 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:19,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:19,245 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-06-12 20:38:19,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:19,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610006736] [2021-06-12 20:38:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:19,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:19,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610006736] [2021-06-12 20:38:19,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610006736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:19,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27474743] [2021-06-12 20:38:19,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:19,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:38:19,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:19,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:19,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:19,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:19,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:19,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:19,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:38:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:19,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27474743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:19,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:19,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:38:19,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181222733] [2021-06-12 20:38:19,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:38:19,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:19,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:38:19,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:19,587 INFO L87 Difference]: Start difference. First operand 2755 states and 11863 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:20,629 INFO L93 Difference]: Finished difference Result 3729 states and 15620 transitions. [2021-06-12 20:38:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:38:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:20,637 INFO L225 Difference]: With dead ends: 3729 [2021-06-12 20:38:20,637 INFO L226 Difference]: Without dead ends: 3710 [2021-06-12 20:38:20,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:38:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-06-12 20:38:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 2886. [2021-06-12 20:38:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2885 states have (on average 4.304332755632582) internal successors, (12418), 2885 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 12418 transitions. [2021-06-12 20:38:20,685 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 12418 transitions. Word has length 29 [2021-06-12 20:38:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:20,685 INFO L482 AbstractCegarLoop]: Abstraction has 2886 states and 12418 transitions. [2021-06-12 20:38:20,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 12418 transitions. [2021-06-12 20:38:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:20,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:20,689 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:20,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 20:38:20,889 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:20,890 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-06-12 20:38:20,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:20,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428237355] [2021-06-12 20:38:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:21,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428237355] [2021-06-12 20:38:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428237355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234261847] [2021-06-12 20:38:21,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:21,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:21,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:21,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:21,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:21,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:38:21,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:21,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-12 20:38:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:21,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234261847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:21,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:21,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:38:21,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840315573] [2021-06-12 20:38:21,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:38:21,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:38:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:38:21,215 INFO L87 Difference]: Start difference. First operand 2886 states and 12418 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:21,470 INFO L93 Difference]: Finished difference Result 3364 states and 14213 transitions. [2021-06-12 20:38:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:38:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:21,477 INFO L225 Difference]: With dead ends: 3364 [2021-06-12 20:38:21,477 INFO L226 Difference]: Without dead ends: 3333 [2021-06-12 20:38:21,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-06-12 20:38:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 2794. [2021-06-12 20:38:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 4.305406373075546) internal successors, (12025), 2793 states have internal predecessors, (12025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 12025 transitions. [2021-06-12 20:38:21,520 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 12025 transitions. Word has length 29 [2021-06-12 20:38:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:21,520 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 12025 transitions. [2021-06-12 20:38:21,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 12025 transitions. [2021-06-12 20:38:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:21,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:21,524 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:21,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 20:38:21,725 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-06-12 20:38:21,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:21,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78907628] [2021-06-12 20:38:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:21,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:21,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78907628] [2021-06-12 20:38:21,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78907628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:21,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274604827] [2021-06-12 20:38:21,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:21,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:21,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:21,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:21,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:38:21,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:21,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-12 20:38:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:22,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274604827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:22,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:22,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:38:22,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100504272] [2021-06-12 20:38:22,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:38:22,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:22,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:38:22,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:38:22,013 INFO L87 Difference]: Start difference. First operand 2794 states and 12025 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:22,221 INFO L93 Difference]: Finished difference Result 2916 states and 12446 transitions. [2021-06-12 20:38:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:38:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:22,227 INFO L225 Difference]: With dead ends: 2916 [2021-06-12 20:38:22,227 INFO L226 Difference]: Without dead ends: 2901 [2021-06-12 20:38:22,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:38:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-06-12 20:38:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2764. [2021-06-12 20:38:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 4.306550850524792) internal successors, (11899), 2763 states have internal predecessors, (11899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 11899 transitions. [2021-06-12 20:38:22,265 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 11899 transitions. Word has length 29 [2021-06-12 20:38:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:22,265 INFO L482 AbstractCegarLoop]: Abstraction has 2764 states and 11899 transitions. [2021-06-12 20:38:22,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 11899 transitions. [2021-06-12 20:38:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:22,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:22,269 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:22,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 20:38:22,471 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:22,471 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-06-12 20:38:22,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:22,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474867986] [2021-06-12 20:38:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:22,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:22,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474867986] [2021-06-12 20:38:22,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474867986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:22,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470494823] [2021-06-12 20:38:22,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:22,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:38:22,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:22,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:22,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:38:22,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:22,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:22,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:22,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:38:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:22,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470494823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:22,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:22,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:38:22,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882353558] [2021-06-12 20:38:22,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:38:22,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:22,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:38:22,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:38:22,804 INFO L87 Difference]: Start difference. First operand 2764 states and 11899 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:23,685 INFO L93 Difference]: Finished difference Result 3801 states and 15824 transitions. [2021-06-12 20:38:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:38:23,685 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:23,693 INFO L225 Difference]: With dead ends: 3801 [2021-06-12 20:38:23,693 INFO L226 Difference]: Without dead ends: 3782 [2021-06-12 20:38:23,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:38:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-06-12 20:38:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 2886. [2021-06-12 20:38:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2885 states have (on average 4.303292894280762) internal successors, (12415), 2885 states have internal predecessors, (12415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 12415 transitions. [2021-06-12 20:38:23,739 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 12415 transitions. Word has length 29 [2021-06-12 20:38:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:23,739 INFO L482 AbstractCegarLoop]: Abstraction has 2886 states and 12415 transitions. [2021-06-12 20:38:23,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 12415 transitions. [2021-06-12 20:38:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:23,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:23,743 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:23,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:23,944 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-06-12 20:38:23,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:23,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740135024] [2021-06-12 20:38:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:24,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:24,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740135024] [2021-06-12 20:38:24,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740135024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:24,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523727047] [2021-06-12 20:38:24,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:24,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:24,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:24,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 20:38:24,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:24,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:24,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:24,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-12 20:38:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523727047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:24,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:24,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:38:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017745825] [2021-06-12 20:38:24,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:38:24,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:38:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:38:24,218 INFO L87 Difference]: Start difference. First operand 2886 states and 12415 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:24,437 INFO L93 Difference]: Finished difference Result 3359 states and 14195 transitions. [2021-06-12 20:38:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:38:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:24,444 INFO L225 Difference]: With dead ends: 3359 [2021-06-12 20:38:24,444 INFO L226 Difference]: Without dead ends: 3328 [2021-06-12 20:38:24,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:38:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-12 20:38:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2794. [2021-06-12 20:38:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 4.3043322592194775) internal successors, (12022), 2793 states have internal predecessors, (12022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 12022 transitions. [2021-06-12 20:38:24,484 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 12022 transitions. Word has length 29 [2021-06-12 20:38:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:24,484 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 12022 transitions. [2021-06-12 20:38:24,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 12022 transitions. [2021-06-12 20:38:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:38:24,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:24,488 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:24,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 20:38:24,691 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash 310926972, now seen corresponding path program 20 times [2021-06-12 20:38:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:24,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216996519] [2021-06-12 20:38:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:24,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:24,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216996519] [2021-06-12 20:38:24,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216996519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:24,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513514301] [2021-06-12 20:38:24,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:24,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:24,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:24,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:24,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:38:24,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:24,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:24,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:24,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-12 20:38:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:24,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513514301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:24,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:24,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 20:38:24,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293212248] [2021-06-12 20:38:24,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:38:24,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:24,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:38:24,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:38:24,994 INFO L87 Difference]: Start difference. First operand 2794 states and 12022 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:25,244 INFO L93 Difference]: Finished difference Result 2908 states and 12388 transitions. [2021-06-12 20:38:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:38:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:38:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:25,251 INFO L225 Difference]: With dead ends: 2908 [2021-06-12 20:38:25,251 INFO L226 Difference]: Without dead ends: 2889 [2021-06-12 20:38:25,251 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:38:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-06-12 20:38:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2770. [2021-06-12 20:38:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 4.30588660166125) internal successors, (11923), 2769 states have internal predecessors, (11923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 11923 transitions. [2021-06-12 20:38:25,287 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 11923 transitions. Word has length 29 [2021-06-12 20:38:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:25,287 INFO L482 AbstractCegarLoop]: Abstraction has 2770 states and 11923 transitions. [2021-06-12 20:38:25,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 11923 transitions. [2021-06-12 20:38:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:38:25,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:25,292 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:25,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 20:38:25,505 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1155389859, now seen corresponding path program 31 times [2021-06-12 20:38:25,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:25,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973200359] [2021-06-12 20:38:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:25,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973200359] [2021-06-12 20:38:25,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973200359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886254219] [2021-06-12 20:38:25,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:38:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886254219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:25,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:25,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:38:25,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891631759] [2021-06-12 20:38:25,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:38:25,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:38:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:38:25,596 INFO L87 Difference]: Start difference. First operand 2770 states and 11923 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:25,664 INFO L93 Difference]: Finished difference Result 4188 states and 17491 transitions. [2021-06-12 20:38:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:38:25,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:38:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:25,673 INFO L225 Difference]: With dead ends: 4188 [2021-06-12 20:38:25,673 INFO L226 Difference]: Without dead ends: 4109 [2021-06-12 20:38:25,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:38:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-12 20:38:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3709. [2021-06-12 20:38:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 3708 states have (on average 4.315803667745415) internal successors, (16003), 3708 states have internal predecessors, (16003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 16003 transitions. [2021-06-12 20:38:25,730 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 16003 transitions. Word has length 31 [2021-06-12 20:38:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:25,730 INFO L482 AbstractCegarLoop]: Abstraction has 3709 states and 16003 transitions. [2021-06-12 20:38:25,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 16003 transitions. [2021-06-12 20:38:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:38:25,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:25,736 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:25,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 20:38:25,937 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2104598493, now seen corresponding path program 32 times [2021-06-12 20:38:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:25,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920309851] [2021-06-12 20:38:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:25,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:25,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920309851] [2021-06-12 20:38:25,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920309851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:25,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783746262] [2021-06-12 20:38:25,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:25,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:25,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:25,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:38:25,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:26,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783746262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:26,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:26,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 20:38:26,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58414795] [2021-06-12 20:38:26,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:38:26,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:38:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:38:26,048 INFO L87 Difference]: Start difference. First operand 3709 states and 16003 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:26,120 INFO L93 Difference]: Finished difference Result 5250 states and 21660 transitions. [2021-06-12 20:38:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:38:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:38:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:26,130 INFO L225 Difference]: With dead ends: 5250 [2021-06-12 20:38:26,130 INFO L226 Difference]: Without dead ends: 5094 [2021-06-12 20:38:26,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:38:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2021-06-12 20:38:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 3857. [2021-06-12 20:38:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 4.282417012448133) internal successors, (16513), 3856 states have internal predecessors, (16513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 16513 transitions. [2021-06-12 20:38:26,205 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 16513 transitions. Word has length 31 [2021-06-12 20:38:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:26,205 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 16513 transitions. [2021-06-12 20:38:26,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 16513 transitions. [2021-06-12 20:38:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:38:26,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:26,211 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:26,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:26,411 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:26,411 INFO L82 PathProgramCache]: Analyzing trace with hash -663936225, now seen corresponding path program 33 times [2021-06-12 20:38:26,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:26,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591380610] [2021-06-12 20:38:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:26,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:26,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591380610] [2021-06-12 20:38:26,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591380610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:26,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941276897] [2021-06-12 20:38:26,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:26,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:26,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:38:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:26,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941276897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:26,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:26,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 20:38:26,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026833156] [2021-06-12 20:38:26,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:38:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:38:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:38:26,520 INFO L87 Difference]: Start difference. First operand 3857 states and 16513 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:26,682 INFO L93 Difference]: Finished difference Result 5984 states and 24494 transitions. [2021-06-12 20:38:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:38:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:38:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:26,694 INFO L225 Difference]: With dead ends: 5984 [2021-06-12 20:38:26,694 INFO L226 Difference]: Without dead ends: 5677 [2021-06-12 20:38:26,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2021-06-12 20:38:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 4432. [2021-06-12 20:38:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 4.299255247122546) internal successors, (19050), 4431 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 19050 transitions. [2021-06-12 20:38:26,798 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 19050 transitions. Word has length 31 [2021-06-12 20:38:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:26,799 INFO L482 AbstractCegarLoop]: Abstraction has 4432 states and 19050 transitions. [2021-06-12 20:38:26,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 19050 transitions. [2021-06-12 20:38:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:38:26,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:26,806 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:27,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:27,006 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash -750260253, now seen corresponding path program 34 times [2021-06-12 20:38:27,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:27,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218899730] [2021-06-12 20:38:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:27,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218899730] [2021-06-12 20:38:27,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218899730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790313070] [2021-06-12 20:38:27,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:27,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:27,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:38:27,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:27,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790313070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:27,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:27,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-12 20:38:27,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812275305] [2021-06-12 20:38:27,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:38:27,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:38:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:38:27,117 INFO L87 Difference]: Start difference. First operand 4432 states and 19050 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:27,189 INFO L93 Difference]: Finished difference Result 5271 states and 22063 transitions. [2021-06-12 20:38:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:38:27,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:38:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:27,201 INFO L225 Difference]: With dead ends: 5271 [2021-06-12 20:38:27,201 INFO L226 Difference]: Without dead ends: 5199 [2021-06-12 20:38:27,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:38:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-06-12 20:38:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4424. [2021-06-12 20:38:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 4.267465521139498) internal successors, (18875), 4423 states have internal predecessors, (18875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 18875 transitions. [2021-06-12 20:38:27,273 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 18875 transitions. Word has length 31 [2021-06-12 20:38:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:27,273 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 18875 transitions. [2021-06-12 20:38:27,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 18875 transitions. [2021-06-12 20:38:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:38:27,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:27,280 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:27,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:27,480 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash 25855295, now seen corresponding path program 35 times [2021-06-12 20:38:27,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:27,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309431892] [2021-06-12 20:38:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:27,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:27,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309431892] [2021-06-12 20:38:27,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309431892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:27,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134084479] [2021-06-12 20:38:27,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:27,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:27,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:27,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:38:27,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:27,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134084479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:27,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:27,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-12 20:38:27,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024520525] [2021-06-12 20:38:27,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:38:27,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:38:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:38:27,579 INFO L87 Difference]: Start difference. First operand 4424 states and 18875 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:27,656 INFO L93 Difference]: Finished difference Result 8018 states and 33019 transitions. [2021-06-12 20:38:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:38:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:38:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:27,674 INFO L225 Difference]: With dead ends: 8018 [2021-06-12 20:38:27,674 INFO L226 Difference]: Without dead ends: 7850 [2021-06-12 20:38:27,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:38:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7850 states. [2021-06-12 20:38:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7850 to 5708. [2021-06-12 20:38:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5708 states, 5707 states have (on average 4.326616435955843) internal successors, (24692), 5707 states have internal predecessors, (24692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 24692 transitions. [2021-06-12 20:38:27,787 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 24692 transitions. Word has length 31 [2021-06-12 20:38:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:27,787 INFO L482 AbstractCegarLoop]: Abstraction has 5708 states and 24692 transitions. [2021-06-12 20:38:27,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 24692 transitions. [2021-06-12 20:38:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:38:27,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:27,796 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:27,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 20:38:27,997 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 36 times [2021-06-12 20:38:27,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:27,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973270938] [2021-06-12 20:38:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:28,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:28,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973270938] [2021-06-12 20:38:28,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973270938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:28,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525554038] [2021-06-12 20:38:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:28,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:28,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:28,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:38:28,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:28,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525554038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:28,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:28,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:38:28,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030536074] [2021-06-12 20:38:28,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:38:28,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:38:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:38:28,092 INFO L87 Difference]: Start difference. First operand 5708 states and 24692 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:28,177 INFO L93 Difference]: Finished difference Result 7044 states and 29327 transitions. [2021-06-12 20:38:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:38:28,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:38:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:28,193 INFO L225 Difference]: With dead ends: 7044 [2021-06-12 20:38:28,193 INFO L226 Difference]: Without dead ends: 6900 [2021-06-12 20:38:28,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:38:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6900 states. [2021-06-12 20:38:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6900 to 5602. [2021-06-12 20:38:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5601 states have (on average 4.31476522049634) internal successors, (24167), 5601 states have internal predecessors, (24167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 24167 transitions. [2021-06-12 20:38:28,319 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 24167 transitions. Word has length 31 [2021-06-12 20:38:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:28,320 INFO L482 AbstractCegarLoop]: Abstraction has 5602 states and 24167 transitions. [2021-06-12 20:38:28,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 24167 transitions. [2021-06-12 20:38:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:38:28,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:28,328 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:28,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 20:38:28,529 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:28,530 INFO L82 PathProgramCache]: Analyzing trace with hash -823782915, now seen corresponding path program 37 times [2021-06-12 20:38:28,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:28,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000865292] [2021-06-12 20:38:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:28,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:28,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000865292] [2021-06-12 20:38:28,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000865292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:28,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402994823] [2021-06-12 20:38:28,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:28,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:38:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:28,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402994823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:28,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:28,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 20:38:28,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883817746] [2021-06-12 20:38:28,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:38:28,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:28,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:38:28,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:38:28,636 INFO L87 Difference]: Start difference. First operand 5602 states and 24167 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:28,737 INFO L93 Difference]: Finished difference Result 8013 states and 33389 transitions. [2021-06-12 20:38:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:38:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:38:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:28,755 INFO L225 Difference]: With dead ends: 8013 [2021-06-12 20:38:28,755 INFO L226 Difference]: Without dead ends: 7878 [2021-06-12 20:38:28,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:38:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-12 20:38:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 5836. [2021-06-12 20:38:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5836 states, 5835 states have (on average 4.310025706940874) internal successors, (25149), 5835 states have internal predecessors, (25149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 25149 transitions. [2021-06-12 20:38:28,880 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 25149 transitions. Word has length 31 [2021-06-12 20:38:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:28,881 INFO L482 AbstractCegarLoop]: Abstraction has 5836 states and 25149 transitions. [2021-06-12 20:38:28,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 25149 transitions. [2021-06-12 20:38:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:28,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:28,891 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:29,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 20:38:29,092 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:29,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1890243778, now seen corresponding path program 38 times [2021-06-12 20:38:29,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:29,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082752974] [2021-06-12 20:38:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:29,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082752974] [2021-06-12 20:38:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082752974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813538532] [2021-06-12 20:38:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:29,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:29,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:29,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:29,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:29,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:29,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:38:29,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:29,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:29,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:29,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-12 20:38:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:29,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813538532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:29,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:29,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:38:29,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440044980] [2021-06-12 20:38:29,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:29,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:29,752 INFO L87 Difference]: Start difference. First operand 5836 states and 25149 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:30,806 INFO L93 Difference]: Finished difference Result 6478 states and 27684 transitions. [2021-06-12 20:38:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:38:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:30,820 INFO L225 Difference]: With dead ends: 6478 [2021-06-12 20:38:30,821 INFO L226 Difference]: Without dead ends: 6459 [2021-06-12 20:38:30,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1002.2ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:38:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-06-12 20:38:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5939. [2021-06-12 20:38:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 4.303974402155608) internal successors, (25557), 5938 states have internal predecessors, (25557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 25557 transitions. [2021-06-12 20:38:30,920 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 25557 transitions. Word has length 33 [2021-06-12 20:38:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:30,920 INFO L482 AbstractCegarLoop]: Abstraction has 5939 states and 25557 transitions. [2021-06-12 20:38:30,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 25557 transitions. [2021-06-12 20:38:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:30,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:30,930 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:31,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 20:38:31,131 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash 185907592, now seen corresponding path program 39 times [2021-06-12 20:38:31,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:31,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089256477] [2021-06-12 20:38:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:31,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:31,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089256477] [2021-06-12 20:38:31,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089256477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:31,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67642926] [2021-06-12 20:38:31,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:31,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:31,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:31,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:31,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:31,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:38:31,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:31,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:31,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:31,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-12 20:38:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67642926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:31,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:38:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895349356] [2021-06-12 20:38:31,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:31,764 INFO L87 Difference]: Start difference. First operand 5939 states and 25557 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:33,016 INFO L93 Difference]: Finished difference Result 6497 states and 27746 transitions. [2021-06-12 20:38:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:38:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:33,031 INFO L225 Difference]: With dead ends: 6497 [2021-06-12 20:38:33,031 INFO L226 Difference]: Without dead ends: 6478 [2021-06-12 20:38:33,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1065.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:38:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-06-12 20:38:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5942. [2021-06-12 20:38:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5941 states have (on average 4.303484261908769) internal successors, (25567), 5941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 25567 transitions. [2021-06-12 20:38:33,126 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 25567 transitions. Word has length 33 [2021-06-12 20:38:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:33,126 INFO L482 AbstractCegarLoop]: Abstraction has 5942 states and 25567 transitions. [2021-06-12 20:38:33,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 25567 transitions. [2021-06-12 20:38:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:33,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:33,136 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:33,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 20:38:33,337 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash -265337576, now seen corresponding path program 40 times [2021-06-12 20:38:33,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:33,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331451006] [2021-06-12 20:38:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:33,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:33,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331451006] [2021-06-12 20:38:33,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331451006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:33,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314586398] [2021-06-12 20:38:33,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:33,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:33,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:33,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:33,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:33,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:33,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:33,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:38:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:33,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314586398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:33,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:33,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:38:33,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655502806] [2021-06-12 20:38:33,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:33,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:33,837 INFO L87 Difference]: Start difference. First operand 5942 states and 25567 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:35,114 INFO L93 Difference]: Finished difference Result 6457 states and 27475 transitions. [2021-06-12 20:38:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:38:35,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:35,128 INFO L225 Difference]: With dead ends: 6457 [2021-06-12 20:38:35,128 INFO L226 Difference]: Without dead ends: 6438 [2021-06-12 20:38:35,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:38:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-06-12 20:38:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5990. [2021-06-12 20:38:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 4.307062948739356) internal successors, (25795), 5989 states have internal predecessors, (25795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 25795 transitions. [2021-06-12 20:38:35,225 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 25795 transitions. Word has length 33 [2021-06-12 20:38:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 25795 transitions. [2021-06-12 20:38:35,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 25795 transitions. [2021-06-12 20:38:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:35,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:35,235 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:35,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:35,435 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:35,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1848381270, now seen corresponding path program 41 times [2021-06-12 20:38:35,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:35,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940262981] [2021-06-12 20:38:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:35,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940262981] [2021-06-12 20:38:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940262981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456220629] [2021-06-12 20:38:35,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:35,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:35,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:35,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:38:35,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:35,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:35,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:35,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:38:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:35,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456220629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:35,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:35,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:38:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568943708] [2021-06-12 20:38:35,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:35,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:35,955 INFO L87 Difference]: Start difference. First operand 5990 states and 25795 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:37,433 INFO L93 Difference]: Finished difference Result 6603 states and 28103 transitions. [2021-06-12 20:38:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:38:37,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:37,453 INFO L225 Difference]: With dead ends: 6603 [2021-06-12 20:38:37,454 INFO L226 Difference]: Without dead ends: 6584 [2021-06-12 20:38:37,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1124.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:38:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-06-12 20:38:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6014. [2021-06-12 20:38:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.308165641110926) internal successors, (25905), 6013 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 25905 transitions. [2021-06-12 20:38:37,584 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 25905 transitions. Word has length 33 [2021-06-12 20:38:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:37,584 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 25905 transitions. [2021-06-12 20:38:37,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 25905 transitions. [2021-06-12 20:38:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:37,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:37,594 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:37,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:37,795 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1882988602, now seen corresponding path program 42 times [2021-06-12 20:38:37,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:37,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243489102] [2021-06-12 20:38:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:38,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:38,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243489102] [2021-06-12 20:38:38,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243489102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:38,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73982074] [2021-06-12 20:38:38,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:38,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:38,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:38,413 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:38:38,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:38:38,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:38,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:38,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:38,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:38:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:38,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73982074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:38,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:38,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:38:38,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843476412] [2021-06-12 20:38:38,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:38:38,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:38,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:38:38,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:38:38,552 INFO L87 Difference]: Start difference. First operand 6014 states and 25905 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:39,981 INFO L93 Difference]: Finished difference Result 6445 states and 27477 transitions. [2021-06-12 20:38:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:38:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:39,995 INFO L225 Difference]: With dead ends: 6445 [2021-06-12 20:38:39,996 INFO L226 Difference]: Without dead ends: 6426 [2021-06-12 20:38:39,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1399.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:38:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-06-12 20:38:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6027. [2021-06-12 20:38:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6027 states, 6026 states have (on average 4.305841354132094) internal successors, (25947), 6026 states have internal predecessors, (25947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 25947 transitions. [2021-06-12 20:38:40,137 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 25947 transitions. Word has length 33 [2021-06-12 20:38:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:40,137 INFO L482 AbstractCegarLoop]: Abstraction has 6027 states and 25947 transitions. [2021-06-12 20:38:40,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 25947 transitions. [2021-06-12 20:38:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:40,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:40,148 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:40,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:40,348 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1511763596, now seen corresponding path program 43 times [2021-06-12 20:38:40,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:40,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018197919] [2021-06-12 20:38:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:40,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:40,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018197919] [2021-06-12 20:38:40,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018197919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344068301] [2021-06-12 20:38:40,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:40,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:40,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:40,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:40,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:40,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:38:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:40,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344068301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:40,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:40,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:40,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61016542] [2021-06-12 20:38:40,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:40,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:40,922 INFO L87 Difference]: Start difference. First operand 6027 states and 25947 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:42,034 INFO L93 Difference]: Finished difference Result 6944 states and 29518 transitions. [2021-06-12 20:38:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:38:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:42,051 INFO L225 Difference]: With dead ends: 6944 [2021-06-12 20:38:42,051 INFO L226 Difference]: Without dead ends: 6929 [2021-06-12 20:38:42,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 840.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:38:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6929 states. [2021-06-12 20:38:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6929 to 6091. [2021-06-12 20:38:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6091 states, 6090 states have (on average 4.304761904761905) internal successors, (26216), 6090 states have internal predecessors, (26216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6091 states to 6091 states and 26216 transitions. [2021-06-12 20:38:42,153 INFO L78 Accepts]: Start accepts. Automaton has 6091 states and 26216 transitions. Word has length 33 [2021-06-12 20:38:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:42,153 INFO L482 AbstractCegarLoop]: Abstraction has 6091 states and 26216 transitions. [2021-06-12 20:38:42,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6091 states and 26216 transitions. [2021-06-12 20:38:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:42,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:42,162 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:42,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 20:38:42,363 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:42,363 INFO L82 PathProgramCache]: Analyzing trace with hash -156629846, now seen corresponding path program 44 times [2021-06-12 20:38:42,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:42,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914163067] [2021-06-12 20:38:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:42,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:42,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914163067] [2021-06-12 20:38:42,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914163067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:42,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214061130] [2021-06-12 20:38:42,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:42,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:42,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:42,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-12 20:38:42,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:42,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:42,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:42,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-12 20:38:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:42,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214061130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:42,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:42,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:38:42,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087190977] [2021-06-12 20:38:42,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:42,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:42,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:42,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:43,000 INFO L87 Difference]: Start difference. First operand 6091 states and 26216 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:43,929 INFO L93 Difference]: Finished difference Result 6487 states and 27705 transitions. [2021-06-12 20:38:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:38:43,930 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:43,944 INFO L225 Difference]: With dead ends: 6487 [2021-06-12 20:38:43,944 INFO L226 Difference]: Without dead ends: 6473 [2021-06-12 20:38:43,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 960.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:38:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-06-12 20:38:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 6077. [2021-06-12 20:38:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 4.307603686635945) internal successors, (26173), 6076 states have internal predecessors, (26173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 26173 transitions. [2021-06-12 20:38:44,039 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 26173 transitions. Word has length 33 [2021-06-12 20:38:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:44,039 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 26173 transitions. [2021-06-12 20:38:44,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 26173 transitions. [2021-06-12 20:38:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:44,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:44,048 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:44,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 20:38:44,249 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1226663166, now seen corresponding path program 45 times [2021-06-12 20:38:44,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:44,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101569586] [2021-06-12 20:38:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:44,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101569586] [2021-06-12 20:38:44,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101569586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262270904] [2021-06-12 20:38:44,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:44,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:44,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:44,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:44,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:44,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:38:44,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:44,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:44,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:44,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-12 20:38:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:44,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262270904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:44,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:44,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:38:44,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585406019] [2021-06-12 20:38:44,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:44,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:44,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:44,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:44,849 INFO L87 Difference]: Start difference. First operand 6077 states and 26173 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:45,981 INFO L93 Difference]: Finished difference Result 6650 states and 28426 transitions. [2021-06-12 20:38:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:38:45,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:45,997 INFO L225 Difference]: With dead ends: 6650 [2021-06-12 20:38:45,997 INFO L226 Difference]: Without dead ends: 6631 [2021-06-12 20:38:45,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1042.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:38:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6631 states. [2021-06-12 20:38:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6631 to 6077. [2021-06-12 20:38:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 4.307603686635945) internal successors, (26173), 6076 states have internal predecessors, (26173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 26173 transitions. [2021-06-12 20:38:46,096 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 26173 transitions. Word has length 33 [2021-06-12 20:38:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:46,096 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 26173 transitions. [2021-06-12 20:38:46,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 26173 transitions. [2021-06-12 20:38:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:46,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:46,106 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:46,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:46,306 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1371223120, now seen corresponding path program 46 times [2021-06-12 20:38:46,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:46,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420720644] [2021-06-12 20:38:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:46,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420720644] [2021-06-12 20:38:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420720644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582593201] [2021-06-12 20:38:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:46,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:46,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:46,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:46,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:46,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:46,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:46,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:38:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:46,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582593201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:46,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:46,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:38:46,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309759609] [2021-06-12 20:38:46,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:46,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:46,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:46,839 INFO L87 Difference]: Start difference. First operand 6077 states and 26173 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:48,047 INFO L93 Difference]: Finished difference Result 7061 states and 30025 transitions. [2021-06-12 20:38:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:38:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:48,063 INFO L225 Difference]: With dead ends: 7061 [2021-06-12 20:38:48,064 INFO L226 Difference]: Without dead ends: 7026 [2021-06-12 20:38:48,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:38:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-12 20:38:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 6011. [2021-06-12 20:38:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.31297836938436) internal successors, (25921), 6010 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 25921 transitions. [2021-06-12 20:38:48,171 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 25921 transitions. Word has length 33 [2021-06-12 20:38:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:48,171 INFO L482 AbstractCegarLoop]: Abstraction has 6011 states and 25921 transitions. [2021-06-12 20:38:48,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 25921 transitions. [2021-06-12 20:38:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:48,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:48,181 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:48,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:48,382 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash 142194076, now seen corresponding path program 47 times [2021-06-12 20:38:48,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:48,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500453177] [2021-06-12 20:38:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:48,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:48,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500453177] [2021-06-12 20:38:48,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500453177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:48,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261244028] [2021-06-12 20:38:48,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:48,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:38:48,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:48,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:48,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:48,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:48,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:48,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:48,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:38:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:48,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261244028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:48,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:48,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:48,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267749562] [2021-06-12 20:38:48,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:48,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:48,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:48,872 INFO L87 Difference]: Start difference. First operand 6011 states and 25921 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:49,324 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 20:38:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:50,734 INFO L93 Difference]: Finished difference Result 7106 states and 29893 transitions. [2021-06-12 20:38:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:38:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:50,751 INFO L225 Difference]: With dead ends: 7106 [2021-06-12 20:38:50,751 INFO L226 Difference]: Without dead ends: 7091 [2021-06-12 20:38:50,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1478.9ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:38:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7091 states. [2021-06-12 20:38:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7091 to 6062. [2021-06-12 20:38:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6062 states, 6061 states have (on average 4.315624484408514) internal successors, (26157), 6061 states have internal predecessors, (26157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 26157 transitions. [2021-06-12 20:38:50,856 INFO L78 Accepts]: Start accepts. Automaton has 6062 states and 26157 transitions. Word has length 33 [2021-06-12 20:38:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:50,856 INFO L482 AbstractCegarLoop]: Abstraction has 6062 states and 26157 transitions. [2021-06-12 20:38:50,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6062 states and 26157 transitions. [2021-06-12 20:38:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:50,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:50,866 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:51,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:51,067 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash -210945414, now seen corresponding path program 48 times [2021-06-12 20:38:51,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:51,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555284309] [2021-06-12 20:38:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:51,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555284309] [2021-06-12 20:38:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555284309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:51,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69671623] [2021-06-12 20:38:51,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:51,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:38:51,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:51,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:38:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:51,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:51,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:38:51,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:51,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:51,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:51,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:48 [2021-06-12 20:38:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:51,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69671623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:51,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:51,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:38:51,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727177903] [2021-06-12 20:38:51,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:38:51,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:51,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:38:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:38:51,872 INFO L87 Difference]: Start difference. First operand 6062 states and 26157 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:54,621 INFO L93 Difference]: Finished difference Result 7070 states and 30030 transitions. [2021-06-12 20:38:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:38:54,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:54,637 INFO L225 Difference]: With dead ends: 7070 [2021-06-12 20:38:54,637 INFO L226 Difference]: Without dead ends: 7047 [2021-06-12 20:38:54,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2170.5ms TimeCoverageRelationStatistics Valid=334, Invalid=3088, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:38:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2021-06-12 20:38:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 6114. [2021-06-12 20:38:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 6113 states have (on average 4.318501554065107) internal successors, (26399), 6113 states have internal predecessors, (26399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 26399 transitions. [2021-06-12 20:38:54,736 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 26399 transitions. Word has length 33 [2021-06-12 20:38:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:54,736 INFO L482 AbstractCegarLoop]: Abstraction has 6114 states and 26399 transitions. [2021-06-12 20:38:54,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 26399 transitions. [2021-06-12 20:38:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:54,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:54,746 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:54,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:54,948 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash -399786980, now seen corresponding path program 49 times [2021-06-12 20:38:54,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:54,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641335823] [2021-06-12 20:38:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:55,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:55,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641335823] [2021-06-12 20:38:55,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641335823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:55,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953769842] [2021-06-12 20:38:55,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:38:55,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:55,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:55,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:55,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:55,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:55,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:38:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:55,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953769842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:55,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:55,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:55,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954994901] [2021-06-12 20:38:55,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:55,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:55,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:55,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:55,452 INFO L87 Difference]: Start difference. First operand 6114 states and 26399 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:57,308 INFO L93 Difference]: Finished difference Result 7388 states and 31262 transitions. [2021-06-12 20:38:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:38:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:57,325 INFO L225 Difference]: With dead ends: 7388 [2021-06-12 20:38:57,325 INFO L226 Difference]: Without dead ends: 7364 [2021-06-12 20:38:57,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1471.2ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:38:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7364 states. [2021-06-12 20:38:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7364 to 6230. [2021-06-12 20:38:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 6229 states have (on average 4.316262642478729) internal successors, (26886), 6229 states have internal predecessors, (26886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 26886 transitions. [2021-06-12 20:38:57,435 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 26886 transitions. Word has length 33 [2021-06-12 20:38:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:57,435 INFO L482 AbstractCegarLoop]: Abstraction has 6230 states and 26886 transitions. [2021-06-12 20:38:57,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 26886 transitions. [2021-06-12 20:38:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:38:57,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:57,446 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:57,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 20:38:57,646 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:57,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2068180422, now seen corresponding path program 50 times [2021-06-12 20:38:57,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:57,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555925116] [2021-06-12 20:38:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:57,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:57,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555925116] [2021-06-12 20:38:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555925116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:57,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502730518] [2021-06-12 20:38:57,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:57,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:57,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:38:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:58,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:58,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:38:58,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:58,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:58,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:58,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-12 20:38:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:58,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502730518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:58,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:58,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:38:58,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640472046] [2021-06-12 20:38:58,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:58,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:58,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:58,190 INFO L87 Difference]: Start difference. First operand 6230 states and 26886 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:59,897 INFO L93 Difference]: Finished difference Result 7081 states and 29790 transitions. [2021-06-12 20:38:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:38:59,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:38:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:59,917 INFO L225 Difference]: With dead ends: 7081 [2021-06-12 20:38:59,918 INFO L226 Difference]: Without dead ends: 7067 [2021-06-12 20:38:59,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1431.5ms TimeCoverageRelationStatistics Valid=310, Invalid=2042, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:38:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7067 states. [2021-06-12 20:39:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7067 to 6227. [2021-06-12 20:39:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6227 states, 6226 states have (on average 4.316736267266303) internal successors, (26876), 6226 states have internal predecessors, (26876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6227 states to 6227 states and 26876 transitions. [2021-06-12 20:39:00,040 INFO L78 Accepts]: Start accepts. Automaton has 6227 states and 26876 transitions. Word has length 33 [2021-06-12 20:39:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:00,040 INFO L482 AbstractCegarLoop]: Abstraction has 6227 states and 26876 transitions. [2021-06-12 20:39:00,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6227 states and 26876 transitions. [2021-06-12 20:39:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:00,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:00,051 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:00,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:00,252 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:00,252 INFO L82 PathProgramCache]: Analyzing trace with hash 44248208, now seen corresponding path program 51 times [2021-06-12 20:39:00,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:00,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82282288] [2021-06-12 20:39:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:00,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82282288] [2021-06-12 20:39:00,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82282288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887951687] [2021-06-12 20:39:00,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:00,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:39:00,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:39:00,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:00,651 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:39:00,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:39:00,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:00,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:00,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:00,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:39:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:00,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887951687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:00,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:00,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:39:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374815124] [2021-06-12 20:39:00,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:39:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:39:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:39:00,840 INFO L87 Difference]: Start difference. First operand 6227 states and 26876 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:02,886 INFO L93 Difference]: Finished difference Result 7505 states and 31385 transitions. [2021-06-12 20:39:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:39:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:02,903 INFO L225 Difference]: With dead ends: 7505 [2021-06-12 20:39:02,903 INFO L226 Difference]: Without dead ends: 7481 [2021-06-12 20:39:02,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1661.9ms TimeCoverageRelationStatistics Valid=400, Invalid=2792, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:39:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2021-06-12 20:39:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 6267. [2021-06-12 20:39:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6267 states, 6266 states have (on average 4.319502074688796) internal successors, (27066), 6266 states have internal predecessors, (27066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6267 states to 6267 states and 27066 transitions. [2021-06-12 20:39:03,015 INFO L78 Accepts]: Start accepts. Automaton has 6267 states and 27066 transitions. Word has length 33 [2021-06-12 20:39:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 6267 states and 27066 transitions. [2021-06-12 20:39:03,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6267 states and 27066 transitions. [2021-06-12 20:39:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:03,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:03,026 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:03,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 20:39:03,282 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1213926998, now seen corresponding path program 52 times [2021-06-12 20:39:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:03,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319023811] [2021-06-12 20:39:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:03,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:03,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319023811] [2021-06-12 20:39:03,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319023811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:03,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301846005] [2021-06-12 20:39:03,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:03,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:03,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:39:03,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:03,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:03,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:03,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:39:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:03,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301846005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:03,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:03,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:03,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247823864] [2021-06-12 20:39:03,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:03,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:03,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:03,708 INFO L87 Difference]: Start difference. First operand 6267 states and 27066 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:04,696 INFO L93 Difference]: Finished difference Result 7474 states and 31665 transitions. [2021-06-12 20:39:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:39:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:04,713 INFO L225 Difference]: With dead ends: 7474 [2021-06-12 20:39:04,713 INFO L226 Difference]: Without dead ends: 7432 [2021-06-12 20:39:04,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 751.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:39:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-06-12 20:39:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 6273. [2021-06-12 20:39:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 6272 states have (on average 4.3217474489795915) internal successors, (27106), 6272 states have internal predecessors, (27106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 27106 transitions. [2021-06-12 20:39:04,825 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 27106 transitions. Word has length 33 [2021-06-12 20:39:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:04,825 INFO L482 AbstractCegarLoop]: Abstraction has 6273 states and 27106 transitions. [2021-06-12 20:39:04,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 27106 transitions. [2021-06-12 20:39:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:04,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:04,837 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:05,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:05,038 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1424413324, now seen corresponding path program 53 times [2021-06-12 20:39:05,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:05,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524148687] [2021-06-12 20:39:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:05,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:05,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524148687] [2021-06-12 20:39:05,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524148687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:05,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337836082] [2021-06-12 20:39:05,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:05,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:39:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:39:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:05,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:05,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:39:05,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:05,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:05,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:05,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 20:39:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:05,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337836082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:05,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:05,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:05,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592377943] [2021-06-12 20:39:05,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:39:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:05,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:39:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:39:05,673 INFO L87 Difference]: Start difference. First operand 6273 states and 27106 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:07,428 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-12 20:39:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:08,465 INFO L93 Difference]: Finished difference Result 7444 states and 31744 transitions. [2021-06-12 20:39:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:39:08,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:08,486 INFO L225 Difference]: With dead ends: 7444 [2021-06-12 20:39:08,486 INFO L226 Difference]: Without dead ends: 7420 [2021-06-12 20:39:08,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2408.1ms TimeCoverageRelationStatistics Valid=612, Invalid=4080, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:39:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7420 states. [2021-06-12 20:39:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7420 to 6357. [2021-06-12 20:39:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6357 states, 6356 states have (on average 4.3233165512901195) internal successors, (27479), 6356 states have internal predecessors, (27479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6357 states to 6357 states and 27479 transitions. [2021-06-12 20:39:08,601 INFO L78 Accepts]: Start accepts. Automaton has 6357 states and 27479 transitions. Word has length 33 [2021-06-12 20:39:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:08,601 INFO L482 AbstractCegarLoop]: Abstraction has 6357 states and 27479 transitions. [2021-06-12 20:39:08,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6357 states and 27479 transitions. [2021-06-12 20:39:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:08,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:08,611 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:08,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:08,812 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1013318964, now seen corresponding path program 54 times [2021-06-12 20:39:08,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:08,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842468731] [2021-06-12 20:39:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:09,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:09,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842468731] [2021-06-12 20:39:09,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842468731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:09,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118156522] [2021-06-12 20:39:09,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:09,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:39:09,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:09,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:39:09,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:09,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:09,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:39:09,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:09,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:09,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:09,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:39:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:09,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118156522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:09,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:09,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:39:09,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593530449] [2021-06-12 20:39:09,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:39:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:09,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:39:09,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:39:09,365 INFO L87 Difference]: Start difference. First operand 6357 states and 27479 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:09,854 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-12 20:39:10,626 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-12 20:39:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:11,686 INFO L93 Difference]: Finished difference Result 7846 states and 32751 transitions. [2021-06-12 20:39:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:39:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:11,703 INFO L225 Difference]: With dead ends: 7846 [2021-06-12 20:39:11,704 INFO L226 Difference]: Without dead ends: 7822 [2021-06-12 20:39:11,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2142.9ms TimeCoverageRelationStatistics Valid=527, Invalid=3255, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:39:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2021-06-12 20:39:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 6441. [2021-06-12 20:39:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 4.327639751552795) internal successors, (27870), 6440 states have internal predecessors, (27870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 27870 transitions. [2021-06-12 20:39:11,817 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 27870 transitions. Word has length 33 [2021-06-12 20:39:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:11,818 INFO L482 AbstractCegarLoop]: Abstraction has 6441 states and 27870 transitions. [2021-06-12 20:39:11,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 27870 transitions. [2021-06-12 20:39:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:11,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:11,828 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:12,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 20:39:12,029 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash -244856242, now seen corresponding path program 55 times [2021-06-12 20:39:12,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:12,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527763888] [2021-06-12 20:39:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:12,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:12,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527763888] [2021-06-12 20:39:12,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527763888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:12,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630060740] [2021-06-12 20:39:12,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:12,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:12,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:39:12,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:12,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:12,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:12,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:39:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630060740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:12,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:12,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:12,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876137355] [2021-06-12 20:39:12,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:12,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:12,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:12,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:12,442 INFO L87 Difference]: Start difference. First operand 6441 states and 27870 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:13,365 INFO L93 Difference]: Finished difference Result 7756 states and 32734 transitions. [2021-06-12 20:39:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:39:13,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:13,382 INFO L225 Difference]: With dead ends: 7756 [2021-06-12 20:39:13,382 INFO L226 Difference]: Without dead ends: 7714 [2021-06-12 20:39:13,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:39:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-06-12 20:39:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 6366. [2021-06-12 20:39:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 4.329929300864101) internal successors, (27560), 6365 states have internal predecessors, (27560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 27560 transitions. [2021-06-12 20:39:13,552 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 27560 transitions. Word has length 33 [2021-06-12 20:39:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:13,552 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 27560 transitions. [2021-06-12 20:39:13,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 27560 transitions. [2021-06-12 20:39:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:13,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:13,562 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:13,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 20:39:13,784 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash 171020724, now seen corresponding path program 56 times [2021-06-12 20:39:13,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:13,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865724253] [2021-06-12 20:39:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:13,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865724253] [2021-06-12 20:39:13,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865724253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:13,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790172303] [2021-06-12 20:39:13,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:13,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:39:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:14,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:14,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:14,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:14,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-12 20:39:14,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:14,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:14,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:14,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-12 20:39:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:14,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790172303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:14,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:14,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:39:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574809896] [2021-06-12 20:39:14,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:39:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:39:14,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:39:14,286 INFO L87 Difference]: Start difference. First operand 6366 states and 27560 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:16,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:16,016 INFO L93 Difference]: Finished difference Result 6927 states and 29768 transitions. [2021-06-12 20:39:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:39:16,016 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:16,032 INFO L225 Difference]: With dead ends: 6927 [2021-06-12 20:39:16,032 INFO L226 Difference]: Without dead ends: 6887 [2021-06-12 20:39:16,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1349.0ms TimeCoverageRelationStatistics Valid=277, Invalid=2075, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:39:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-06-12 20:39:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6354. [2021-06-12 20:39:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6354 states, 6353 states have (on average 4.3297654651345825) internal successors, (27507), 6353 states have internal predecessors, (27507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 27507 transitions. [2021-06-12 20:39:16,172 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 27507 transitions. Word has length 33 [2021-06-12 20:39:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:16,172 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 27507 transitions. [2021-06-12 20:39:16,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 27507 transitions. [2021-06-12 20:39:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:16,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:16,183 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:16,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:16,383 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:16,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1030111212, now seen corresponding path program 57 times [2021-06-12 20:39:16,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:16,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338808775] [2021-06-12 20:39:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:16,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:16,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338808775] [2021-06-12 20:39:16,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338808775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:16,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513872361] [2021-06-12 20:39:16,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:16,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:16,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:39:16,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:16,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:16,814 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:39:16,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:39:16,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:39:16,842 INFO L628 ElimStorePlain]: treesize reduction 67, result has 24.7 percent of original size [2021-06-12 20:39:16,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:16,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:39:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:16,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513872361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:16,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:16,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:39:16,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529260287] [2021-06-12 20:39:16,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:39:16,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:39:16,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:39:16,982 INFO L87 Difference]: Start difference. First operand 6354 states and 27507 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:17,746 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-12 20:39:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:20,123 INFO L93 Difference]: Finished difference Result 7896 states and 33401 transitions. [2021-06-12 20:39:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:39:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:20,140 INFO L225 Difference]: With dead ends: 7896 [2021-06-12 20:39:20,141 INFO L226 Difference]: Without dead ends: 7866 [2021-06-12 20:39:20,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 2372.6ms TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:39:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7866 states. [2021-06-12 20:39:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7866 to 6485. [2021-06-12 20:39:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 6484 states have (on average 4.343460826650216) internal successors, (28163), 6484 states have internal predecessors, (28163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 28163 transitions. [2021-06-12 20:39:20,257 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 28163 transitions. Word has length 33 [2021-06-12 20:39:20,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:20,257 INFO L482 AbstractCegarLoop]: Abstraction has 6485 states and 28163 transitions. [2021-06-12 20:39:20,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 28163 transitions. [2021-06-12 20:39:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:20,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:20,268 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:20,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 20:39:20,468 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1218952778, now seen corresponding path program 58 times [2021-06-12 20:39:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:20,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255553581] [2021-06-12 20:39:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:20,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255553581] [2021-06-12 20:39:20,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255553581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063953097] [2021-06-12 20:39:20,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:20,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:20,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:20,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:39:20,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:20,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:20,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:20,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:39:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:20,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063953097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:20,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:20,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:20,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311289071] [2021-06-12 20:39:20,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:20,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:20,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:20,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:20,915 INFO L87 Difference]: Start difference. First operand 6485 states and 28163 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:22,752 INFO L93 Difference]: Finished difference Result 8537 states and 35873 transitions. [2021-06-12 20:39:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:39:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:22,771 INFO L225 Difference]: With dead ends: 8537 [2021-06-12 20:39:22,771 INFO L226 Difference]: Without dead ends: 8510 [2021-06-12 20:39:22,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1339.1ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:39:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8510 states. [2021-06-12 20:39:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8510 to 6636. [2021-06-12 20:39:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 4.33896006028636) internal successors, (28789), 6635 states have internal predecessors, (28789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 28789 transitions. [2021-06-12 20:39:22,896 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 28789 transitions. Word has length 33 [2021-06-12 20:39:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:22,896 INFO L482 AbstractCegarLoop]: Abstraction has 6636 states and 28789 transitions. [2021-06-12 20:39:22,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 28789 transitions. [2021-06-12 20:39:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:22,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:22,907 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:23,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-12 20:39:23,107 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1407621076, now seen corresponding path program 59 times [2021-06-12 20:39:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:23,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851431169] [2021-06-12 20:39:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:23,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851431169] [2021-06-12 20:39:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851431169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012483128] [2021-06-12 20:39:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:23,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:23,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:23,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:39:23,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:23,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:23,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:23,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:39:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:23,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012483128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:23,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:23,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:23,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175425954] [2021-06-12 20:39:23,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:23,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:23,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:23,618 INFO L87 Difference]: Start difference. First operand 6636 states and 28789 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:25,939 INFO L93 Difference]: Finished difference Result 9219 states and 37824 transitions. [2021-06-12 20:39:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:39:25,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:25,959 INFO L225 Difference]: With dead ends: 9219 [2021-06-12 20:39:25,959 INFO L226 Difference]: Without dead ends: 9147 [2021-06-12 20:39:25,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1802.2ms TimeCoverageRelationStatistics Valid=436, Invalid=2986, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:39:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-06-12 20:39:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 6588. [2021-06-12 20:39:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6588 states, 6587 states have (on average 4.340367390314255) internal successors, (28590), 6587 states have internal predecessors, (28590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 28590 transitions. [2021-06-12 20:39:26,092 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 28590 transitions. Word has length 33 [2021-06-12 20:39:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:26,092 INFO L482 AbstractCegarLoop]: Abstraction has 6588 states and 28590 transitions. [2021-06-12 20:39:26,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 28590 transitions. [2021-06-12 20:39:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:26,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:26,103 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:26,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:26,304 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:26,304 INFO L82 PathProgramCache]: Analyzing trace with hash 565322836, now seen corresponding path program 60 times [2021-06-12 20:39:26,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:26,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012300080] [2021-06-12 20:39:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:26,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:26,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012300080] [2021-06-12 20:39:26,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012300080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:26,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099635714] [2021-06-12 20:39:26,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:26,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:39:26,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:26,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:39:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:26,787 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-12 20:39:26,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 59 [2021-06-12 20:39:26,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:39:26,939 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-12 20:39:26,939 INFO L628 ElimStorePlain]: treesize reduction 73, result has 53.8 percent of original size [2021-06-12 20:39:26,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:26,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:284 [2021-06-12 20:39:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099635714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:27,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:27,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:39:27,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841685504] [2021-06-12 20:39:27,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:39:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:39:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:39:27,216 INFO L87 Difference]: Start difference. First operand 6588 states and 28590 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:29,586 INFO L93 Difference]: Finished difference Result 7677 states and 32864 transitions. [2021-06-12 20:39:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:39:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:29,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:29,604 INFO L225 Difference]: With dead ends: 7677 [2021-06-12 20:39:29,605 INFO L226 Difference]: Without dead ends: 7637 [2021-06-12 20:39:29,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1982.2ms TimeCoverageRelationStatistics Valid=398, Invalid=2908, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:39:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7637 states. [2021-06-12 20:39:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7637 to 6618. [2021-06-12 20:39:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6618 states, 6617 states have (on average 4.344113646667674) internal successors, (28745), 6617 states have internal predecessors, (28745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6618 states to 6618 states and 28745 transitions. [2021-06-12 20:39:29,722 INFO L78 Accepts]: Start accepts. Automaton has 6618 states and 28745 transitions. Word has length 33 [2021-06-12 20:39:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:29,722 INFO L482 AbstractCegarLoop]: Abstraction has 6618 states and 28745 transitions. [2021-06-12 20:39:29,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 6618 states and 28745 transitions. [2021-06-12 20:39:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:29,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:29,732 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:29,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 20:39:29,941 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1105113426, now seen corresponding path program 61 times [2021-06-12 20:39:29,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:29,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697183668] [2021-06-12 20:39:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:30,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:30,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697183668] [2021-06-12 20:39:30,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697183668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:30,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548341348] [2021-06-12 20:39:30,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:30,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:30,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:30,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:30,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:30,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:39:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:30,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548341348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:30,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:30,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:30,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52799221] [2021-06-12 20:39:30,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:30,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:30,439 INFO L87 Difference]: Start difference. First operand 6618 states and 28745 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:31,481 INFO L93 Difference]: Finished difference Result 7218 states and 30949 transitions. [2021-06-12 20:39:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:39:31,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:31,497 INFO L225 Difference]: With dead ends: 7218 [2021-06-12 20:39:31,497 INFO L226 Difference]: Without dead ends: 7163 [2021-06-12 20:39:31,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:39:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2021-06-12 20:39:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 6624. [2021-06-12 20:39:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 4.342443001660879) internal successors, (28760), 6623 states have internal predecessors, (28760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 28760 transitions. [2021-06-12 20:39:31,608 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 28760 transitions. Word has length 33 [2021-06-12 20:39:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:31,608 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 28760 transitions. [2021-06-12 20:39:31,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 28760 transitions. [2021-06-12 20:39:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:31,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:31,619 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:31,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 20:39:31,820 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1571821348, now seen corresponding path program 62 times [2021-06-12 20:39:31,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:31,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113387633] [2021-06-12 20:39:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:31,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113387633] [2021-06-12 20:39:31,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113387633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829115344] [2021-06-12 20:39:31,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:32,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:32,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:39:32,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:32,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:32,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:32,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:32,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:39:32,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:32,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:32,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:32,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-12 20:39:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:32,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829115344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:32,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:32,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:39:32,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825507552] [2021-06-12 20:39:32,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:39:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:39:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:39:32,327 INFO L87 Difference]: Start difference. First operand 6624 states and 28760 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:33,736 INFO L93 Difference]: Finished difference Result 7256 states and 31130 transitions. [2021-06-12 20:39:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:39:33,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:33,752 INFO L225 Difference]: With dead ends: 7256 [2021-06-12 20:39:33,752 INFO L226 Difference]: Without dead ends: 7216 [2021-06-12 20:39:33,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1181.1ms TimeCoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:39:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7216 states. [2021-06-12 20:39:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7216 to 6606. [2021-06-12 20:39:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6606 states, 6605 states have (on average 4.342619227857684) internal successors, (28683), 6605 states have internal predecessors, (28683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 28683 transitions. [2021-06-12 20:39:33,862 INFO L78 Accepts]: Start accepts. Automaton has 6606 states and 28683 transitions. Word has length 33 [2021-06-12 20:39:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:33,862 INFO L482 AbstractCegarLoop]: Abstraction has 6606 states and 28683 transitions. [2021-06-12 20:39:33,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6606 states and 28683 transitions. [2021-06-12 20:39:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:33,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:33,873 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:34,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 20:39:34,074 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash 506133940, now seen corresponding path program 63 times [2021-06-12 20:39:34,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:34,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598317972] [2021-06-12 20:39:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:34,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:34,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598317972] [2021-06-12 20:39:34,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598317972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:34,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114115312] [2021-06-12 20:39:34,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:34,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:34,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:39:34,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:34,588 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-06-12 20:39:34,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 65 [2021-06-12 20:39:34,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:39:34,731 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-12 20:39:34,732 INFO L628 ElimStorePlain]: treesize reduction 75, result has 59.9 percent of original size [2021-06-12 20:39:34,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:34,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:112 [2021-06-12 20:39:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:35,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114115312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:35,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:35,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:39:35,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830670945] [2021-06-12 20:39:35,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:39:35,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:35,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:39:35,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:39:35,031 INFO L87 Difference]: Start difference. First operand 6606 states and 28683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:35,478 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-12 20:39:36,030 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-12 20:39:37,852 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-06-12 20:39:38,071 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-12 20:39:38,877 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-12 20:39:39,066 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 20:39:39,223 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-12 20:39:39,380 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-12 20:39:39,554 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-12 20:39:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:39,569 INFO L93 Difference]: Finished difference Result 7811 states and 33358 transitions. [2021-06-12 20:39:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:39:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:39,587 INFO L225 Difference]: With dead ends: 7811 [2021-06-12 20:39:39,588 INFO L226 Difference]: Without dead ends: 7796 [2021-06-12 20:39:39,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 3906.8ms TimeCoverageRelationStatistics Valid=503, Invalid=4327, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:39:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-06-12 20:39:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 6722. [2021-06-12 20:39:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 4.3489064127362) internal successors, (29229), 6721 states have internal predecessors, (29229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 29229 transitions. [2021-06-12 20:39:39,708 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 29229 transitions. Word has length 33 [2021-06-12 20:39:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:39,708 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 29229 transitions. [2021-06-12 20:39:39,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 29229 transitions. [2021-06-12 20:39:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:39,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:39,719 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:39,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-12 20:39:39,920 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash 317292374, now seen corresponding path program 64 times [2021-06-12 20:39:39,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:39,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622110079] [2021-06-12 20:39:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:40,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:40,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622110079] [2021-06-12 20:39:40,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622110079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:40,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114368292] [2021-06-12 20:39:40,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:40,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:40,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:40,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:40,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:40,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:39:40,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:40,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:40,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:40,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:39:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:40,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114368292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:40,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:40,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384975973] [2021-06-12 20:39:40,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:40,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:40,401 INFO L87 Difference]: Start difference. First operand 6722 states and 29229 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:42,532 INFO L93 Difference]: Finished difference Result 7950 states and 33911 transitions. [2021-06-12 20:39:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:39:42,532 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:42,550 INFO L225 Difference]: With dead ends: 7950 [2021-06-12 20:39:42,550 INFO L226 Difference]: Without dead ends: 7932 [2021-06-12 20:39:42,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1648.2ms TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:39:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7932 states. [2021-06-12 20:39:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7932 to 6738. [2021-06-12 20:39:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 4.346741873237346) internal successors, (29284), 6737 states have internal predecessors, (29284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 29284 transitions. [2021-06-12 20:39:42,671 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 29284 transitions. Word has length 33 [2021-06-12 20:39:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:42,671 INFO L482 AbstractCegarLoop]: Abstraction has 6738 states and 29284 transitions. [2021-06-12 20:39:42,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 29284 transitions. [2021-06-12 20:39:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:42,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:42,682 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:42,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:42,883 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:42,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1351101068, now seen corresponding path program 65 times [2021-06-12 20:39:42,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:42,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634920077] [2021-06-12 20:39:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:43,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:43,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634920077] [2021-06-12 20:39:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634920077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:43,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224899826] [2021-06-12 20:39:43,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:43,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:43,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:43,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 20:39:43,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:43,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:43,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:43,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:43,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2021-06-12 20:39:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:43,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224899826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:43,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:43,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:39:43,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732254353] [2021-06-12 20:39:43,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:43,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:43,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:43,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:43,430 INFO L87 Difference]: Start difference. First operand 6738 states and 29284 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:46,121 INFO L93 Difference]: Finished difference Result 8797 states and 36618 transitions. [2021-06-12 20:39:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:39:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:46,141 INFO L225 Difference]: With dead ends: 8797 [2021-06-12 20:39:46,141 INFO L226 Difference]: Without dead ends: 8739 [2021-06-12 20:39:46,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2229.3ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:39:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8739 states. [2021-06-12 20:39:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8739 to 6678. [2021-06-12 20:39:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 6677 states have (on average 4.346413059757376) internal successors, (29021), 6677 states have internal predecessors, (29021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 29021 transitions. [2021-06-12 20:39:46,266 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 29021 transitions. Word has length 33 [2021-06-12 20:39:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:46,266 INFO L482 AbstractCegarLoop]: Abstraction has 6678 states and 29021 transitions. [2021-06-12 20:39:46,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 29021 transitions. [2021-06-12 20:39:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:46,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:46,277 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:46,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:46,477 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:46,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2101567988, now seen corresponding path program 66 times [2021-06-12 20:39:46,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:46,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460051101] [2021-06-12 20:39:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:46,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460051101] [2021-06-12 20:39:46,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460051101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484975778] [2021-06-12 20:39:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:46,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:39:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:39:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:46,925 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-12 20:39:46,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 59 [2021-06-12 20:39:46,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:39:47,158 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-12 20:39:47,158 INFO L628 ElimStorePlain]: treesize reduction 87, result has 50.0 percent of original size [2021-06-12 20:39:47,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:47,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:286 [2021-06-12 20:39:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:47,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484975778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:47,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:47,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:39:47,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146054360] [2021-06-12 20:39:47,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:39:47,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:39:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:39:47,377 INFO L87 Difference]: Start difference. First operand 6678 states and 29021 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:48,071 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:39:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:49,823 INFO L93 Difference]: Finished difference Result 7738 states and 33148 transitions. [2021-06-12 20:39:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:39:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:49,841 INFO L225 Difference]: With dead ends: 7738 [2021-06-12 20:39:49,841 INFO L226 Difference]: Without dead ends: 7698 [2021-06-12 20:39:49,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 2123.9ms TimeCoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:39:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7698 states. [2021-06-12 20:39:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7698 to 6699. [2021-06-12 20:39:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6699 states, 6698 states have (on average 4.348760824126605) internal successors, (29128), 6698 states have internal predecessors, (29128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6699 states to 6699 states and 29128 transitions. [2021-06-12 20:39:49,991 INFO L78 Accepts]: Start accepts. Automaton has 6699 states and 29128 transitions. Word has length 33 [2021-06-12 20:39:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:49,991 INFO L482 AbstractCegarLoop]: Abstraction has 6699 states and 29128 transitions. [2021-06-12 20:39:49,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6699 states and 29128 transitions. [2021-06-12 20:39:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:50,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:50,003 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:50,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:50,205 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 431131726, now seen corresponding path program 67 times [2021-06-12 20:39:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:50,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928479576] [2021-06-12 20:39:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:50,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:50,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928479576] [2021-06-12 20:39:50,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928479576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:50,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679079537] [2021-06-12 20:39:50,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:50,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:50,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:50,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:50,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:50,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:50,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:39:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:50,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679079537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:50,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:50,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:50,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487716050] [2021-06-12 20:39:50,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:50,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:50,634 INFO L87 Difference]: Start difference. First operand 6699 states and 29128 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:51,765 INFO L93 Difference]: Finished difference Result 7394 states and 31574 transitions. [2021-06-12 20:39:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:39:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:51,781 INFO L225 Difference]: With dead ends: 7394 [2021-06-12 20:39:51,782 INFO L226 Difference]: Without dead ends: 7339 [2021-06-12 20:39:51,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 829.2ms TimeCoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:39:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2021-06-12 20:39:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 6702. [2021-06-12 20:39:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6702 states, 6701 states have (on average 4.3481569914938065) internal successors, (29137), 6701 states have internal predecessors, (29137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6702 states to 6702 states and 29137 transitions. [2021-06-12 20:39:51,899 INFO L78 Accepts]: Start accepts. Automaton has 6702 states and 29137 transitions. Word has length 33 [2021-06-12 20:39:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:51,899 INFO L482 AbstractCegarLoop]: Abstraction has 6702 states and 29137 transitions. [2021-06-12 20:39:51,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6702 states and 29137 transitions. [2021-06-12 20:39:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:51,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:51,910 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:52,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 20:39:52,111 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash -35576196, now seen corresponding path program 68 times [2021-06-12 20:39:52,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:52,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355662403] [2021-06-12 20:39:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:52,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:52,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355662403] [2021-06-12 20:39:52,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355662403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:52,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248998568] [2021-06-12 20:39:52,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:52,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:52,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:52,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:39:52,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:52,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-12 20:39:52,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:52,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:52,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:52,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-06-12 20:39:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:52,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248998568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:52,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:52,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:39:52,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077682294] [2021-06-12 20:39:52,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:39:52,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:52,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:39:52,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:39:52,738 INFO L87 Difference]: Start difference. First operand 6702 states and 29137 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:53,789 INFO L93 Difference]: Finished difference Result 7454 states and 31805 transitions. [2021-06-12 20:39:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:39:53,790 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:53,806 INFO L225 Difference]: With dead ends: 7454 [2021-06-12 20:39:53,806 INFO L226 Difference]: Without dead ends: 7374 [2021-06-12 20:39:53,806 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1098.5ms TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:39:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7374 states. [2021-06-12 20:39:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7374 to 6684. [2021-06-12 20:39:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6684 states, 6683 states have (on average 4.345204249588508) internal successors, (29039), 6683 states have internal predecessors, (29039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6684 states to 6684 states and 29039 transitions. [2021-06-12 20:39:53,917 INFO L78 Accepts]: Start accepts. Automaton has 6684 states and 29039 transitions. Word has length 33 [2021-06-12 20:39:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:53,917 INFO L482 AbstractCegarLoop]: Abstraction has 6684 states and 29039 transitions. [2021-06-12 20:39:53,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6684 states and 29039 transitions. [2021-06-12 20:39:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:53,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:53,928 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:54,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-12 20:39:54,129 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1331921396, now seen corresponding path program 69 times [2021-06-12 20:39:54,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:54,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601631526] [2021-06-12 20:39:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:54,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:54,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601631526] [2021-06-12 20:39:54,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601631526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:54,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078823303] [2021-06-12 20:39:54,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:54,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:54,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:54,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:54,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:54,595 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:39:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-12 20:39:54,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:39:54,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:54,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:54,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-12 20:39:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:54,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078823303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:54,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:54,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:39:54,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355148579] [2021-06-12 20:39:54,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:39:54,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:54,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:39:54,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:39:54,693 INFO L87 Difference]: Start difference. First operand 6684 states and 29039 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:56,121 INFO L93 Difference]: Finished difference Result 7199 states and 30900 transitions. [2021-06-12 20:39:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:39:56,121 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:56,138 INFO L225 Difference]: With dead ends: 7199 [2021-06-12 20:39:56,138 INFO L226 Difference]: Without dead ends: 7128 [2021-06-12 20:39:56,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1146.4ms TimeCoverageRelationStatistics Valid=177, Invalid=1893, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:39:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2021-06-12 20:39:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 6687. [2021-06-12 20:39:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6686 states have (on average 4.344151959317978) internal successors, (29045), 6686 states have internal predecessors, (29045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 29045 transitions. [2021-06-12 20:39:56,249 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 29045 transitions. Word has length 33 [2021-06-12 20:39:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:56,249 INFO L482 AbstractCegarLoop]: Abstraction has 6687 states and 29045 transitions. [2021-06-12 20:39:56,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 29045 transitions. [2021-06-12 20:39:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:56,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:56,261 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:56,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:56,465 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2012246164, now seen corresponding path program 70 times [2021-06-12 20:39:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:56,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248475919] [2021-06-12 20:39:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:56,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:56,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248475919] [2021-06-12 20:39:56,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248475919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:56,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465962157] [2021-06-12 20:39:56,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:56,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:56,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:56,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:56,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:56,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:39:56,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:56,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:56,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:56,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:39:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:56,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465962157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:56,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:56,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:56,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268938076] [2021-06-12 20:39:56,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:56,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:56,883 INFO L87 Difference]: Start difference. First operand 6687 states and 29045 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:58,395 INFO L93 Difference]: Finished difference Result 8321 states and 35424 transitions. [2021-06-12 20:39:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:39:58,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:39:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:58,415 INFO L225 Difference]: With dead ends: 8321 [2021-06-12 20:39:58,415 INFO L226 Difference]: Without dead ends: 8276 [2021-06-12 20:39:58,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1006.9ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:39:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-12 20:39:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6858. [2021-06-12 20:39:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6857 states have (on average 4.352194837392446) internal successors, (29843), 6857 states have internal predecessors, (29843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 29843 transitions. [2021-06-12 20:39:58,537 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 29843 transitions. Word has length 33 [2021-06-12 20:39:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:58,538 INFO L482 AbstractCegarLoop]: Abstraction has 6858 states and 29843 transitions. [2021-06-12 20:39:58,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 29843 transitions. [2021-06-12 20:39:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:39:58,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:58,548 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:58,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-12 20:39:58,749 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:58,749 INFO L82 PathProgramCache]: Analyzing trace with hash 72346634, now seen corresponding path program 71 times [2021-06-12 20:39:58,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:58,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484293110] [2021-06-12 20:39:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:58,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:58,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484293110] [2021-06-12 20:39:58,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484293110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:58,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808376974] [2021-06-12 20:39:58,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:58,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:39:58,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:39:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:39:59,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:59,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:59,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:59,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:39:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:59,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808376974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:59,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:59,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:39:59,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208119545] [2021-06-12 20:39:59,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:59,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:59,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:59,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:59,143 INFO L87 Difference]: Start difference. First operand 6858 states and 29843 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:00,354 INFO L93 Difference]: Finished difference Result 8197 states and 34940 transitions. [2021-06-12 20:40:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:40:00,354 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:00,373 INFO L225 Difference]: With dead ends: 8197 [2021-06-12 20:40:00,373 INFO L226 Difference]: Without dead ends: 8152 [2021-06-12 20:40:00,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:40:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2021-06-12 20:40:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 6814. [2021-06-12 20:40:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6814 states, 6813 states have (on average 4.3537355056509615) internal successors, (29662), 6813 states have internal predecessors, (29662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6814 states to 6814 states and 29662 transitions. [2021-06-12 20:40:00,540 INFO L78 Accepts]: Start accepts. Automaton has 6814 states and 29662 transitions. Word has length 33 [2021-06-12 20:40:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:00,540 INFO L482 AbstractCegarLoop]: Abstraction has 6814 states and 29662 transitions. [2021-06-12 20:40:00,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6814 states and 29662 transitions. [2021-06-12 20:40:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:00,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:00,551 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:00,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:00,752 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 63209602, now seen corresponding path program 72 times [2021-06-12 20:40:00,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:00,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609125215] [2021-06-12 20:40:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:00,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:00,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609125215] [2021-06-12 20:40:00,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609125215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:00,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246338860] [2021-06-12 20:40:00,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:00,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:40:00,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:40:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:01,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:01,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:40:01,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:01,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:01,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:01,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:39 [2021-06-12 20:40:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:01,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246338860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:01,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:01,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:40:01,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116259831] [2021-06-12 20:40:01,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:40:01,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:40:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:40:01,381 INFO L87 Difference]: Start difference. First operand 6814 states and 29662 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:02,469 INFO L93 Difference]: Finished difference Result 7608 states and 32846 transitions. [2021-06-12 20:40:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:40:02,469 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:02,486 INFO L225 Difference]: With dead ends: 7608 [2021-06-12 20:40:02,486 INFO L226 Difference]: Without dead ends: 7593 [2021-06-12 20:40:02,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:40:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2021-06-12 20:40:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6808. [2021-06-12 20:40:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6807 states have (on average 4.354781842221243) internal successors, (29643), 6807 states have internal predecessors, (29643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 29643 transitions. [2021-06-12 20:40:02,605 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 29643 transitions. Word has length 33 [2021-06-12 20:40:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:02,605 INFO L482 AbstractCegarLoop]: Abstraction has 6808 states and 29643 transitions. [2021-06-12 20:40:02,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 29643 transitions. [2021-06-12 20:40:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:02,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:02,616 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:02,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:02,817 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:02,817 INFO L82 PathProgramCache]: Analyzing trace with hash -62958544, now seen corresponding path program 73 times [2021-06-12 20:40:02,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:02,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207871953] [2021-06-12 20:40:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:02,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:02,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207871953] [2021-06-12 20:40:02,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207871953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176235519] [2021-06-12 20:40:02,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:03,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:03,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:03,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:03,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:03,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:03,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:40:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:03,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176235519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:03,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:03,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:03,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963782824] [2021-06-12 20:40:03,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:03,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:03,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:03,291 INFO L87 Difference]: Start difference. First operand 6808 states and 29643 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:04,816 INFO L93 Difference]: Finished difference Result 7949 states and 34134 transitions. [2021-06-12 20:40:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:40:04,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:04,834 INFO L225 Difference]: With dead ends: 7949 [2021-06-12 20:40:04,834 INFO L226 Difference]: Without dead ends: 7904 [2021-06-12 20:40:04,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1103.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:40:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2021-06-12 20:40:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 6943. [2021-06-12 20:40:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6943 states, 6942 states have (on average 4.358254105445116) internal successors, (30255), 6942 states have internal predecessors, (30255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 30255 transitions. [2021-06-12 20:40:04,968 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 30255 transitions. Word has length 33 [2021-06-12 20:40:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:04,968 INFO L482 AbstractCegarLoop]: Abstraction has 6943 states and 30255 transitions. [2021-06-12 20:40:04,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 30255 transitions. [2021-06-12 20:40:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:04,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:04,980 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:05,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 20:40:05,180 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2021634254, now seen corresponding path program 74 times [2021-06-12 20:40:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:05,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527339513] [2021-06-12 20:40:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:05,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527339513] [2021-06-12 20:40:05,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527339513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39225388] [2021-06-12 20:40:05,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:40:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:05,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:40:05,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:05,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:05,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:05,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-12 20:40:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:05,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39225388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:05,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:05,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:40:05,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283898360] [2021-06-12 20:40:05,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:05,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:05,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:05,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:05,654 INFO L87 Difference]: Start difference. First operand 6943 states and 30255 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:07,573 INFO L93 Difference]: Finished difference Result 7629 states and 32933 transitions. [2021-06-12 20:40:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:40:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:07,591 INFO L225 Difference]: With dead ends: 7629 [2021-06-12 20:40:07,591 INFO L226 Difference]: Without dead ends: 7594 [2021-06-12 20:40:07,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1551.1ms TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:40:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-06-12 20:40:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6877. [2021-06-12 20:40:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 4.361983711460152) internal successors, (29993), 6876 states have internal predecessors, (29993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 29993 transitions. [2021-06-12 20:40:07,716 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 29993 transitions. Word has length 33 [2021-06-12 20:40:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:07,716 INFO L482 AbstractCegarLoop]: Abstraction has 6877 states and 29993 transitions. [2021-06-12 20:40:07,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 29993 transitions. [2021-06-12 20:40:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:07,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:07,728 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:07,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 20:40:07,929 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1629565944, now seen corresponding path program 75 times [2021-06-12 20:40:07,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:07,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968950672] [2021-06-12 20:40:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:08,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968950672] [2021-06-12 20:40:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968950672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728762409] [2021-06-12 20:40:08,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:08,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:40:08,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:08,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:08,438 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-06-12 20:40:08,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-06-12 20:40:08,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:08,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:08,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:08,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:71 [2021-06-12 20:40:08,736 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-12 20:40:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:08,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728762409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:08,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:08,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:40:08,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993572083] [2021-06-12 20:40:08,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:40:08,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:08,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:40:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:40:08,979 INFO L87 Difference]: Start difference. First operand 6877 states and 29993 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:09,453 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-06-12 20:40:09,784 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-12 20:40:10,036 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-12 20:40:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:11,787 INFO L93 Difference]: Finished difference Result 7996 states and 34415 transitions. [2021-06-12 20:40:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:40:11,787 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:11,806 INFO L225 Difference]: With dead ends: 7996 [2021-06-12 20:40:11,806 INFO L226 Difference]: Without dead ends: 7973 [2021-06-12 20:40:11,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2729.4ms TimeCoverageRelationStatistics Valid=398, Invalid=2908, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:40:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2021-06-12 20:40:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 7066. [2021-06-12 20:40:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7066 states, 7065 states have (on average 4.369568294409059) internal successors, (30871), 7065 states have internal predecessors, (30871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 30871 transitions. [2021-06-12 20:40:12,012 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 30871 transitions. Word has length 33 [2021-06-12 20:40:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:12,012 INFO L482 AbstractCegarLoop]: Abstraction has 7066 states and 30871 transitions. [2021-06-12 20:40:12,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 30871 transitions. [2021-06-12 20:40:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:12,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:12,026 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:12,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 20:40:12,226 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash 808166344, now seen corresponding path program 76 times [2021-06-12 20:40:12,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:12,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009572024] [2021-06-12 20:40:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:12,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:12,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009572024] [2021-06-12 20:40:12,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009572024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:12,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640288893] [2021-06-12 20:40:12,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:12,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:12,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:12,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:12,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:12,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:12,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:12,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:12,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:40:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:12,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640288893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:12,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:12,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421755004] [2021-06-12 20:40:12,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:12,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:12,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:12,640 INFO L87 Difference]: Start difference. First operand 7066 states and 30871 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:13,503 INFO L93 Difference]: Finished difference Result 8285 states and 35451 transitions. [2021-06-12 20:40:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:40:13,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:13,522 INFO L225 Difference]: With dead ends: 8285 [2021-06-12 20:40:13,523 INFO L226 Difference]: Without dead ends: 8248 [2021-06-12 20:40:13,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:40:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-06-12 20:40:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 7230. [2021-06-12 20:40:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 4.3726656522340575) internal successors, (31610), 7229 states have internal predecessors, (31610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 31610 transitions. [2021-06-12 20:40:13,660 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 31610 transitions. Word has length 33 [2021-06-12 20:40:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:13,660 INFO L482 AbstractCegarLoop]: Abstraction has 7230 states and 31610 transitions. [2021-06-12 20:40:13,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 31610 transitions. [2021-06-12 20:40:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:13,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:13,673 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:13,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:13,873 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1218384580, now seen corresponding path program 77 times [2021-06-12 20:40:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:13,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662000382] [2021-06-12 20:40:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:14,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:14,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662000382] [2021-06-12 20:40:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662000382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199186244] [2021-06-12 20:40:14,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:14,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:40:14,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:14,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:14,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:14,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:14,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:14,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:14,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:40:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:14,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199186244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:14,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:14,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:14,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938869762] [2021-06-12 20:40:14,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:14,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:14,278 INFO L87 Difference]: Start difference. First operand 7230 states and 31610 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:15,289 INFO L93 Difference]: Finished difference Result 8304 states and 35535 transitions. [2021-06-12 20:40:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:40:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:15,308 INFO L225 Difference]: With dead ends: 8304 [2021-06-12 20:40:15,308 INFO L226 Difference]: Without dead ends: 8273 [2021-06-12 20:40:15,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 786.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:40:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8273 states. [2021-06-12 20:40:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8273 to 7199. [2021-06-12 20:40:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7198 states have (on average 4.3734370658516255) internal successors, (31480), 7198 states have internal predecessors, (31480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 31480 transitions. [2021-06-12 20:40:15,468 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 31480 transitions. Word has length 33 [2021-06-12 20:40:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:15,468 INFO L482 AbstractCegarLoop]: Abstraction has 7199 states and 31480 transitions. [2021-06-12 20:40:15,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 31480 transitions. [2021-06-12 20:40:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:15,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:15,482 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:15,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 20:40:15,683 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -34131896, now seen corresponding path program 78 times [2021-06-12 20:40:15,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:15,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414666943] [2021-06-12 20:40:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:15,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414666943] [2021-06-12 20:40:15,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414666943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022032297] [2021-06-12 20:40:15,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:15,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:40:15,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:15,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:16,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:40:16,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:16,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:16,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:16,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:40:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:16,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022032297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:16,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:16,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:40:16,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221015186] [2021-06-12 20:40:16,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:40:16,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:40:16,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:40:16,307 INFO L87 Difference]: Start difference. First operand 7199 states and 31480 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:18,221 INFO L93 Difference]: Finished difference Result 8292 states and 36024 transitions. [2021-06-12 20:40:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:40:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:18,241 INFO L225 Difference]: With dead ends: 8292 [2021-06-12 20:40:18,241 INFO L226 Difference]: Without dead ends: 8273 [2021-06-12 20:40:18,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1702.0ms TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:40:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8273 states. [2021-06-12 20:40:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8273 to 7196. [2021-06-12 20:40:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 4.373870743571925) internal successors, (31470), 7195 states have internal predecessors, (31470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 31470 transitions. [2021-06-12 20:40:18,374 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 31470 transitions. Word has length 33 [2021-06-12 20:40:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:18,374 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 31470 transitions. [2021-06-12 20:40:18,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 31470 transitions. [2021-06-12 20:40:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:18,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:18,387 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:18,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 20:40:18,588 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2046764810, now seen corresponding path program 79 times [2021-06-12 20:40:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:18,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038123367] [2021-06-12 20:40:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:18,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:18,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038123367] [2021-06-12 20:40:18,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038123367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:18,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504367355] [2021-06-12 20:40:18,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:18,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:18,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:18,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:18,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:18,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:18,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:40:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:19,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504367355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:19,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:19,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:19,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218943847] [2021-06-12 20:40:19,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:19,028 INFO L87 Difference]: Start difference. First operand 7196 states and 31470 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:20,795 INFO L93 Difference]: Finished difference Result 9100 states and 38003 transitions. [2021-06-12 20:40:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:40:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:20,816 INFO L225 Difference]: With dead ends: 9100 [2021-06-12 20:40:20,816 INFO L226 Difference]: Without dead ends: 9042 [2021-06-12 20:40:20,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1490.9ms TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:40:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-06-12 20:40:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7280. [2021-06-12 20:40:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7280 states, 7279 states have (on average 4.377249622200852) internal successors, (31862), 7279 states have internal predecessors, (31862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7280 states to 7280 states and 31862 transitions. [2021-06-12 20:40:20,952 INFO L78 Accepts]: Start accepts. Automaton has 7280 states and 31862 transitions. Word has length 33 [2021-06-12 20:40:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:20,952 INFO L482 AbstractCegarLoop]: Abstraction has 7280 states and 31862 transitions. [2021-06-12 20:40:20,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7280 states and 31862 transitions. [2021-06-12 20:40:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:20,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:20,964 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:21,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 20:40:21,165 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:21,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1706221430, now seen corresponding path program 80 times [2021-06-12 20:40:21,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:21,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818647059] [2021-06-12 20:40:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:21,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:21,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818647059] [2021-06-12 20:40:21,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818647059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:21,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775918352] [2021-06-12 20:40:21,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:21,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:21,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:40:21,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:21,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:21,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:21,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:40:21,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:21,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:21,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:21,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-12 20:40:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775918352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:21,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:21,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:40:21,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839307902] [2021-06-12 20:40:21,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:40:21,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:40:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:40:21,692 INFO L87 Difference]: Start difference. First operand 7280 states and 31862 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:23,593 INFO L93 Difference]: Finished difference Result 8139 states and 34976 transitions. [2021-06-12 20:40:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:40:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:23,611 INFO L225 Difference]: With dead ends: 8139 [2021-06-12 20:40:23,612 INFO L226 Difference]: Without dead ends: 8129 [2021-06-12 20:40:23,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1707.2ms TimeCoverageRelationStatistics Valid=394, Invalid=2056, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:40:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8129 states. [2021-06-12 20:40:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8129 to 7321. [2021-06-12 20:40:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7321 states, 7320 states have (on average 4.373633879781421) internal successors, (32015), 7320 states have internal predecessors, (32015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 32015 transitions. [2021-06-12 20:40:23,736 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 32015 transitions. Word has length 33 [2021-06-12 20:40:23,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:23,736 INFO L482 AbstractCegarLoop]: Abstraction has 7321 states and 32015 transitions. [2021-06-12 20:40:23,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:23,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 32015 transitions. [2021-06-12 20:40:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:23,748 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:23,748 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:23,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-12 20:40:23,949 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:23,949 INFO L82 PathProgramCache]: Analyzing trace with hash 37827988, now seen corresponding path program 81 times [2021-06-12 20:40:23,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:23,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128254804] [2021-06-12 20:40:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:24,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:24,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128254804] [2021-06-12 20:40:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128254804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910372308] [2021-06-12 20:40:24,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:24,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:40:24,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:24,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:24,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:40:24,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:24,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:24,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:24,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:40:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:24,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910372308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:24,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:24,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:40:24,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725337358] [2021-06-12 20:40:24,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:40:24,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:40:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:40:24,522 INFO L87 Difference]: Start difference. First operand 7321 states and 32015 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:27,271 INFO L93 Difference]: Finished difference Result 9160 states and 38074 transitions. [2021-06-12 20:40:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:40:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:27,292 INFO L225 Difference]: With dead ends: 9160 [2021-06-12 20:40:27,292 INFO L226 Difference]: Without dead ends: 9129 [2021-06-12 20:40:27,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2405.1ms TimeCoverageRelationStatistics Valid=557, Invalid=3475, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:40:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-06-12 20:40:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7321. [2021-06-12 20:40:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7321 states, 7320 states have (on average 4.373224043715847) internal successors, (32012), 7320 states have internal predecessors, (32012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 32012 transitions. [2021-06-12 20:40:27,421 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 32012 transitions. Word has length 33 [2021-06-12 20:40:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:27,421 INFO L482 AbstractCegarLoop]: Abstraction has 7321 states and 32012 transitions. [2021-06-12 20:40:27,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 32012 transitions. [2021-06-12 20:40:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:27,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:27,433 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:27,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:27,634 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:27,634 INFO L82 PathProgramCache]: Analyzing trace with hash -287475670, now seen corresponding path program 82 times [2021-06-12 20:40:27,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:27,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492912691] [2021-06-12 20:40:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:27,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492912691] [2021-06-12 20:40:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492912691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971166189] [2021-06-12 20:40:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:28,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:28,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:28,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:28,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:28,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:28,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:40:28,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:28,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:28,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:28,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:40:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:28,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971166189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:28,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:28,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:28,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452267619] [2021-06-12 20:40:28,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:28,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:28,256 INFO L87 Difference]: Start difference. First operand 7321 states and 32012 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:29,131 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-12 20:40:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:29,994 INFO L93 Difference]: Finished difference Result 8782 states and 37424 transitions. [2021-06-12 20:40:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:40:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:30,014 INFO L225 Difference]: With dead ends: 8782 [2021-06-12 20:40:30,014 INFO L226 Difference]: Without dead ends: 8736 [2021-06-12 20:40:30,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1587.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:40:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8736 states. [2021-06-12 20:40:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8736 to 7382. [2021-06-12 20:40:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 4.369462132502371) internal successors, (32251), 7381 states have internal predecessors, (32251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 32251 transitions. [2021-06-12 20:40:30,150 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 32251 transitions. Word has length 33 [2021-06-12 20:40:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:30,150 INFO L482 AbstractCegarLoop]: Abstraction has 7382 states and 32251 transitions. [2021-06-12 20:40:30,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 32251 transitions. [2021-06-12 20:40:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:30,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:30,162 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:30,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:30,363 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2144710678, now seen corresponding path program 83 times [2021-06-12 20:40:30,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:30,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909703020] [2021-06-12 20:40:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:30,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:30,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909703020] [2021-06-12 20:40:30,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909703020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:30,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446759996] [2021-06-12 20:40:30,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:30,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:40:30,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:30,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:40:30,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:30,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:30,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:30,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:40:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:30,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446759996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:30,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:30,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:40:30,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217271329] [2021-06-12 20:40:30,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:30,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:30,831 INFO L87 Difference]: Start difference. First operand 7382 states and 32251 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:32,428 INFO L93 Difference]: Finished difference Result 9441 states and 39121 transitions. [2021-06-12 20:40:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:40:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:32,448 INFO L225 Difference]: With dead ends: 9441 [2021-06-12 20:40:32,448 INFO L226 Difference]: Without dead ends: 9343 [2021-06-12 20:40:32,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1347.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1590, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:40:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2021-06-12 20:40:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 7330. [2021-06-12 20:40:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7330 states, 7329 states have (on average 4.371947059626143) internal successors, (32042), 7329 states have internal predecessors, (32042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7330 states to 7330 states and 32042 transitions. [2021-06-12 20:40:32,581 INFO L78 Accepts]: Start accepts. Automaton has 7330 states and 32042 transitions. Word has length 33 [2021-06-12 20:40:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:32,581 INFO L482 AbstractCegarLoop]: Abstraction has 7330 states and 32042 transitions. [2021-06-12 20:40:32,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7330 states and 32042 transitions. [2021-06-12 20:40:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:32,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:32,594 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:32,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:32,794 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash 681595086, now seen corresponding path program 84 times [2021-06-12 20:40:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:32,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774583245] [2021-06-12 20:40:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:33,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:33,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774583245] [2021-06-12 20:40:33,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774583245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:33,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345809007] [2021-06-12 20:40:33,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:33,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:40:33,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:33,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:40:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:33,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:33,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:40:33,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:33,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:33,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:33,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:40:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:33,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345809007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:33,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:33,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:40:33,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023878131] [2021-06-12 20:40:33,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:40:33,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:33,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:40:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:40:33,377 INFO L87 Difference]: Start difference. First operand 7330 states and 32042 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:33,851 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-12 20:40:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:36,127 INFO L93 Difference]: Finished difference Result 8529 states and 36495 transitions. [2021-06-12 20:40:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:40:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:36,148 INFO L225 Difference]: With dead ends: 8529 [2021-06-12 20:40:36,148 INFO L226 Difference]: Without dead ends: 8483 [2021-06-12 20:40:36,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2302.3ms TimeCoverageRelationStatistics Valid=580, Invalid=3580, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:40:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8483 states. [2021-06-12 20:40:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8483 to 7448. [2021-06-12 20:40:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7448 states, 7447 states have (on average 4.376393178461125) internal successors, (32591), 7447 states have internal predecessors, (32591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7448 states to 7448 states and 32591 transitions. [2021-06-12 20:40:36,294 INFO L78 Accepts]: Start accepts. Automaton has 7448 states and 32591 transitions. Word has length 33 [2021-06-12 20:40:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:36,294 INFO L482 AbstractCegarLoop]: Abstraction has 7448 states and 32591 transitions. [2021-06-12 20:40:36,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7448 states and 32591 transitions. [2021-06-12 20:40:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:36,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:36,306 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:36,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-12 20:40:36,507 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:36,507 INFO L82 PathProgramCache]: Analyzing trace with hash 492753520, now seen corresponding path program 85 times [2021-06-12 20:40:36,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:36,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975317538] [2021-06-12 20:40:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:36,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:36,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975317538] [2021-06-12 20:40:36,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975317538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:36,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542522715] [2021-06-12 20:40:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:36,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:36,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:36,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:36,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:36,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:36,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:40:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:37,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542522715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:37,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:37,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:37,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279425822] [2021-06-12 20:40:37,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:37,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:37,018 INFO L87 Difference]: Start difference. First operand 7448 states and 32591 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:38,572 INFO L93 Difference]: Finished difference Result 8674 states and 36998 transitions. [2021-06-12 20:40:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:40:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:38,591 INFO L225 Difference]: With dead ends: 8674 [2021-06-12 20:40:38,591 INFO L226 Difference]: Without dead ends: 8646 [2021-06-12 20:40:38,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1405.1ms TimeCoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:40:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-06-12 20:40:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 7453. [2021-06-12 20:40:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 4.37614063338701) internal successors, (32611), 7452 states have internal predecessors, (32611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 32611 transitions. [2021-06-12 20:40:38,736 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 32611 transitions. Word has length 33 [2021-06-12 20:40:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:38,736 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 32611 transitions. [2021-06-12 20:40:38,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 32611 transitions. [2021-06-12 20:40:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:38,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:38,749 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:38,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 20:40:38,949 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639922, now seen corresponding path program 86 times [2021-06-12 20:40:38,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:38,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455775105] [2021-06-12 20:40:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:39,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:39,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455775105] [2021-06-12 20:40:39,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455775105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:39,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787561296] [2021-06-12 20:40:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:39,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:39,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:39,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:40:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:39,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:39,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:40:39,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:39,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:39,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:39,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-12 20:40:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:39,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787561296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:39,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:39,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:40:39,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093667060] [2021-06-12 20:40:39,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:39,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:39,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:39,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:39,536 INFO L87 Difference]: Start difference. First operand 7453 states and 32611 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:40,492 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-12 20:40:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:41,787 INFO L93 Difference]: Finished difference Result 9335 states and 38912 transitions. [2021-06-12 20:40:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:40:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:41,808 INFO L225 Difference]: With dead ends: 9335 [2021-06-12 20:40:41,808 INFO L226 Difference]: Without dead ends: 9256 [2021-06-12 20:40:41,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2010.5ms TimeCoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:40:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9256 states. [2021-06-12 20:40:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9256 to 7413. [2021-06-12 20:40:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7413 states, 7412 states have (on average 4.376956287101997) internal successors, (32442), 7412 states have internal predecessors, (32442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7413 states to 7413 states and 32442 transitions. [2021-06-12 20:40:41,989 INFO L78 Accepts]: Start accepts. Automaton has 7413 states and 32442 transitions. Word has length 33 [2021-06-12 20:40:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:41,989 INFO L482 AbstractCegarLoop]: Abstraction has 7413 states and 32442 transitions. [2021-06-12 20:40:41,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7413 states and 32442 transitions. [2021-06-12 20:40:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:42,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:42,002 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:42,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-12 20:40:42,202 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash 180638590, now seen corresponding path program 87 times [2021-06-12 20:40:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:42,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487669594] [2021-06-12 20:40:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:42,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:42,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487669594] [2021-06-12 20:40:42,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487669594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373234669] [2021-06-12 20:40:42,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:42,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:40:42,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:42,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:42,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:40:42,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:42,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:42,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:42,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:40:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:42,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373234669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:42,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:42,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:40:42,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552791887] [2021-06-12 20:40:42,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:40:42,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:40:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:40:42,812 INFO L87 Difference]: Start difference. First operand 7413 states and 32442 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:44,638 INFO L93 Difference]: Finished difference Result 8183 states and 35550 transitions. [2021-06-12 20:40:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:40:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:44,705 INFO L225 Difference]: With dead ends: 8183 [2021-06-12 20:40:44,706 INFO L226 Difference]: Without dead ends: 8132 [2021-06-12 20:40:44,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1528.4ms TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:40:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-12 20:40:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 7394. [2021-06-12 20:40:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.380089273637225) internal successors, (32382), 7393 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 32382 transitions. [2021-06-12 20:40:44,815 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 32382 transitions. Word has length 33 [2021-06-12 20:40:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:44,815 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 32382 transitions. [2021-06-12 20:40:44,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 32382 transitions. [2021-06-12 20:40:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:44,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:44,827 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:45,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 20:40:45,029 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1075897198, now seen corresponding path program 88 times [2021-06-12 20:40:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:45,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905896295] [2021-06-12 20:40:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:45,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:45,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905896295] [2021-06-12 20:40:45,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905896295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:45,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64674848] [2021-06-12 20:40:45,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:45,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:45,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:45,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:45,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:40:45,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:45,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:45,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:45,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:40:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:45,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64674848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:45,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:45,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:45,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175554867] [2021-06-12 20:40:45,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:45,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:45,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:45,548 INFO L87 Difference]: Start difference. First operand 7394 states and 32382 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:48,834 INFO L93 Difference]: Finished difference Result 9547 states and 40304 transitions. [2021-06-12 20:40:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:40:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:48,855 INFO L225 Difference]: With dead ends: 9547 [2021-06-12 20:40:48,855 INFO L226 Difference]: Without dead ends: 9485 [2021-06-12 20:40:48,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 2718.4ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 20:40:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9485 states. [2021-06-12 20:40:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9485 to 7485. [2021-06-12 20:40:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7485 states, 7484 states have (on average 4.383217530732229) internal successors, (32804), 7484 states have internal predecessors, (32804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7485 states to 7485 states and 32804 transitions. [2021-06-12 20:40:48,999 INFO L78 Accepts]: Start accepts. Automaton has 7485 states and 32804 transitions. Word has length 33 [2021-06-12 20:40:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:48,999 INFO L482 AbstractCegarLoop]: Abstraction has 7485 states and 32804 transitions. [2021-06-12 20:40:48,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 7485 states and 32804 transitions. [2021-06-12 20:40:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:49,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:49,012 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:49,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:49,217 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2039513016, now seen corresponding path program 89 times [2021-06-12 20:40:49,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:49,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997212419] [2021-06-12 20:40:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:49,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997212419] [2021-06-12 20:40:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997212419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295100401] [2021-06-12 20:40:49,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:49,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:40:49,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:49,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:49,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:40:49,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:49,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:49,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:49,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:40:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:49,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295100401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:49,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:49,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:49,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847214174] [2021-06-12 20:40:49,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:49,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:49,583 INFO L87 Difference]: Start difference. First operand 7485 states and 32804 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:50,426 INFO L93 Difference]: Finished difference Result 8568 states and 36781 transitions. [2021-06-12 20:40:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:40:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:50,446 INFO L225 Difference]: With dead ends: 8568 [2021-06-12 20:40:50,447 INFO L226 Difference]: Without dead ends: 8456 [2021-06-12 20:40:50,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:40:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8456 states. [2021-06-12 20:40:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8456 to 7415. [2021-06-12 20:40:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 4.388858915565147) internal successors, (32539), 7414 states have internal predecessors, (32539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 32539 transitions. [2021-06-12 20:40:50,589 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 32539 transitions. Word has length 33 [2021-06-12 20:40:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:50,589 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 32539 transitions. [2021-06-12 20:40:50,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 32539 transitions. [2021-06-12 20:40:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:50,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:50,602 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:50,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-12 20:40:50,803 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash 444102738, now seen corresponding path program 90 times [2021-06-12 20:40:50,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:50,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584270738] [2021-06-12 20:40:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:51,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:51,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584270738] [2021-06-12 20:40:51,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584270738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:51,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154316783] [2021-06-12 20:40:51,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:51,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:40:51,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:40:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:51,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:51,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:40:51,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:51,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:51,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:51,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-12 20:40:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:51,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154316783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:51,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:51,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:40:51,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893521252] [2021-06-12 20:40:51,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:40:51,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:51,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:40:51,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:40:51,364 INFO L87 Difference]: Start difference. First operand 7415 states and 32539 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:53,765 INFO L93 Difference]: Finished difference Result 8905 states and 37420 transitions. [2021-06-12 20:40:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:40:53,765 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:53,784 INFO L225 Difference]: With dead ends: 8905 [2021-06-12 20:40:53,784 INFO L226 Difference]: Without dead ends: 8876 [2021-06-12 20:40:53,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1958.9ms TimeCoverageRelationStatistics Valid=349, Invalid=3311, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:40:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8876 states. [2021-06-12 20:40:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8876 to 7415. [2021-06-12 20:40:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 4.388454275694632) internal successors, (32536), 7414 states have internal predecessors, (32536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 32536 transitions. [2021-06-12 20:40:53,916 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 32536 transitions. Word has length 33 [2021-06-12 20:40:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:53,916 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 32536 transitions. [2021-06-12 20:40:53,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:53,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 32536 transitions. [2021-06-12 20:40:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:53,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:53,928 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:54,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 20:40:54,129 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash -97878318, now seen corresponding path program 91 times [2021-06-12 20:40:54,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:54,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595613946] [2021-06-12 20:40:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:54,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:54,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595613946] [2021-06-12 20:40:54,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595613946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:54,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115007343] [2021-06-12 20:40:54,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:54,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:40:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:54,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:54,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:54,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:54,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:54,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:40:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:54,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115007343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:54,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:54,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:54,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909438808] [2021-06-12 20:40:54,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:54,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:54,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:54,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:54,584 INFO L87 Difference]: Start difference. First operand 7415 states and 32536 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:56,465 INFO L93 Difference]: Finished difference Result 8441 states and 36452 transitions. [2021-06-12 20:40:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:40:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:40:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:56,483 INFO L225 Difference]: With dead ends: 8441 [2021-06-12 20:40:56,483 INFO L226 Difference]: Without dead ends: 8408 [2021-06-12 20:40:56,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1477.7ms TimeCoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:40:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8408 states. [2021-06-12 20:40:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8408 to 7514. [2021-06-12 20:40:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 4.387062425129775) internal successors, (32960), 7513 states have internal predecessors, (32960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 32960 transitions. [2021-06-12 20:40:56,601 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 32960 transitions. Word has length 33 [2021-06-12 20:40:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:56,601 INFO L482 AbstractCegarLoop]: Abstraction has 7514 states and 32960 transitions. [2021-06-12 20:40:56,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 32960 transitions. [2021-06-12 20:40:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:40:56,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:56,614 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:56,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:56,814 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:56,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1766271760, now seen corresponding path program 92 times [2021-06-12 20:40:56,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:56,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649761413] [2021-06-12 20:40:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:57,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:57,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649761413] [2021-06-12 20:40:57,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649761413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:57,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462682926] [2021-06-12 20:40:57,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:57,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:40:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:57,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:57,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:40:57,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:57,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:57,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:57,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-12 20:40:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:57,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462682926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:57,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:57,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:40:57,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632009286] [2021-06-12 20:40:57,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:57,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:57,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:57,356 INFO L87 Difference]: Start difference. First operand 7514 states and 32960 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:59,771 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-12 20:41:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:00,271 INFO L93 Difference]: Finished difference Result 9252 states and 38729 transitions. [2021-06-12 20:41:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:41:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:00,291 INFO L225 Difference]: With dead ends: 9252 [2021-06-12 20:41:00,291 INFO L226 Difference]: Without dead ends: 9154 [2021-06-12 20:41:00,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2329.2ms TimeCoverageRelationStatistics Valid=466, Invalid=3074, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:41:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9154 states. [2021-06-12 20:41:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9154 to 7455. [2021-06-12 20:41:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 4.390931043734907) internal successors, (32730), 7454 states have internal predecessors, (32730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 32730 transitions. [2021-06-12 20:41:00,429 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 32730 transitions. Word has length 33 [2021-06-12 20:41:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:00,429 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 32730 transitions. [2021-06-12 20:41:00,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 32730 transitions. [2021-06-12 20:41:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:00,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:00,442 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:00,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:00,642 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1122504662, now seen corresponding path program 93 times [2021-06-12 20:41:00,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:00,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170667367] [2021-06-12 20:41:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:00,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170667367] [2021-06-12 20:41:00,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170667367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246944271] [2021-06-12 20:41:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:00,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:41:00,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:01,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:01,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:41:01,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:01,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:01,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:01,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:41:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:01,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246944271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:01,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:01,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:41:01,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037511466] [2021-06-12 20:41:01,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:41:01,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:01,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:41:01,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:41:01,308 INFO L87 Difference]: Start difference. First operand 7455 states and 32730 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:01,450 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-12 20:41:01,598 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-06-12 20:41:02,907 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 20:41:04,804 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-12 20:41:05,330 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-12 20:41:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:05,558 INFO L93 Difference]: Finished difference Result 9227 states and 39360 transitions. [2021-06-12 20:41:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:41:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:05,578 INFO L225 Difference]: With dead ends: 9227 [2021-06-12 20:41:05,578 INFO L226 Difference]: Without dead ends: 9181 [2021-06-12 20:41:05,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 3560.6ms TimeCoverageRelationStatistics Valid=670, Invalid=4880, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:41:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2021-06-12 20:41:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 7547. [2021-06-12 20:41:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7547 states, 7546 states have (on average 4.397429101510734) internal successors, (33183), 7546 states have internal predecessors, (33183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7547 states to 7547 states and 33183 transitions. [2021-06-12 20:41:05,715 INFO L78 Accepts]: Start accepts. Automaton has 7547 states and 33183 transitions. Word has length 33 [2021-06-12 20:41:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:05,715 INFO L482 AbstractCegarLoop]: Abstraction has 7547 states and 33183 transitions. [2021-06-12 20:41:05,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7547 states and 33183 transitions. [2021-06-12 20:41:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:05,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:05,728 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:05,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:05,928 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1311346228, now seen corresponding path program 94 times [2021-06-12 20:41:05,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:05,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082165738] [2021-06-12 20:41:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:06,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082165738] [2021-06-12 20:41:06,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082165738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224732331] [2021-06-12 20:41:06,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:06,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:06,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:06,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:06,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:41:06,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:06,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:06,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:06,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:41:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:06,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224732331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:06,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:06,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:06,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417414407] [2021-06-12 20:41:06,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:06,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:06,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:06,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:06,376 INFO L87 Difference]: Start difference. First operand 7547 states and 33183 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:06,781 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-12 20:41:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:08,283 INFO L93 Difference]: Finished difference Result 8624 states and 37117 transitions. [2021-06-12 20:41:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:41:08,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:08,303 INFO L225 Difference]: With dead ends: 8624 [2021-06-12 20:41:08,303 INFO L226 Difference]: Without dead ends: 8596 [2021-06-12 20:41:08,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1580.7ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:41:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2021-06-12 20:41:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 7513. [2021-06-12 20:41:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7512 states have (on average 4.3895101171459) internal successors, (32974), 7512 states have internal predecessors, (32974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 32974 transitions. [2021-06-12 20:41:08,443 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 32974 transitions. Word has length 33 [2021-06-12 20:41:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:08,443 INFO L482 AbstractCegarLoop]: Abstraction has 7513 states and 32974 transitions. [2021-06-12 20:41:08,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 32974 transitions. [2021-06-12 20:41:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:08,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:08,455 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:08,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 20:41:08,656 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1315227626, now seen corresponding path program 95 times [2021-06-12 20:41:08,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:08,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445522202] [2021-06-12 20:41:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:08,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445522202] [2021-06-12 20:41:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445522202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969627517] [2021-06-12 20:41:08,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:08,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:41:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 20:41:08,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:09,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:09,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 20:41:09,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:09,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:09,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:09,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:23 [2021-06-12 20:41:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:09,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969627517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:09,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:09,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:41:09,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599469894] [2021-06-12 20:41:09,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:09,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:09,147 INFO L87 Difference]: Start difference. First operand 7513 states and 32974 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:11,354 INFO L93 Difference]: Finished difference Result 9456 states and 39560 transitions. [2021-06-12 20:41:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:41:11,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:11,375 INFO L225 Difference]: With dead ends: 9456 [2021-06-12 20:41:11,375 INFO L226 Difference]: Without dead ends: 9308 [2021-06-12 20:41:11,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1796.9ms TimeCoverageRelationStatistics Valid=518, Invalid=3142, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:41:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9308 states. [2021-06-12 20:41:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9308 to 7526. [2021-06-12 20:41:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7526 states, 7525 states have (on average 4.396677740863788) internal successors, (33085), 7525 states have internal predecessors, (33085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7526 states to 7526 states and 33085 transitions. [2021-06-12 20:41:11,514 INFO L78 Accepts]: Start accepts. Automaton has 7526 states and 33085 transitions. Word has length 33 [2021-06-12 20:41:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:11,514 INFO L482 AbstractCegarLoop]: Abstraction has 7526 states and 33085 transitions. [2021-06-12 20:41:11,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 7526 states and 33085 transitions. [2021-06-12 20:41:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:11,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:11,527 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:11,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 20:41:11,727 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -728202550, now seen corresponding path program 96 times [2021-06-12 20:41:11,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:11,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926591813] [2021-06-12 20:41:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:11,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:11,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926591813] [2021-06-12 20:41:11,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926591813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:11,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189287506] [2021-06-12 20:41:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:11,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:41:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:11,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:12,215 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:41:12,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:41:12,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:41:12,252 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-12 20:41:12,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:12,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:41:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:12,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189287506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:12,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:12,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:41:12,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911366337] [2021-06-12 20:41:12,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:41:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:41:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:41:12,397 INFO L87 Difference]: Start difference. First operand 7526 states and 33085 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:15,136 INFO L93 Difference]: Finished difference Result 8776 states and 37721 transitions. [2021-06-12 20:41:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:41:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:15,156 INFO L225 Difference]: With dead ends: 8776 [2021-06-12 20:41:15,156 INFO L226 Difference]: Without dead ends: 8730 [2021-06-12 20:41:15,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 2151.3ms TimeCoverageRelationStatistics Valid=479, Invalid=3553, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:41:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8730 states. [2021-06-12 20:41:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8730 to 7677. [2021-06-12 20:41:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7677 states, 7676 states have (on average 4.4041167274622195) internal successors, (33806), 7676 states have internal predecessors, (33806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 33806 transitions. [2021-06-12 20:41:15,290 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 33806 transitions. Word has length 33 [2021-06-12 20:41:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:15,290 INFO L482 AbstractCegarLoop]: Abstraction has 7677 states and 33806 transitions. [2021-06-12 20:41:15,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 33806 transitions. [2021-06-12 20:41:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:15,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:15,302 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:15,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-12 20:41:15,503 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:15,503 INFO L82 PathProgramCache]: Analyzing trace with hash -917044116, now seen corresponding path program 97 times [2021-06-12 20:41:15,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:15,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639572868] [2021-06-12 20:41:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:15,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:15,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639572868] [2021-06-12 20:41:15,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639572868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:15,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949455738] [2021-06-12 20:41:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:15,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:15,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:15,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:15,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:15,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:15,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:41:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:15,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949455738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:15,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:15,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519805352] [2021-06-12 20:41:15,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:15,983 INFO L87 Difference]: Start difference. First operand 7677 states and 33806 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:18,298 INFO L93 Difference]: Finished difference Result 9373 states and 40015 transitions. [2021-06-12 20:41:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 20:41:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:18,320 INFO L225 Difference]: With dead ends: 9373 [2021-06-12 20:41:18,320 INFO L226 Difference]: Without dead ends: 9346 [2021-06-12 20:41:18,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1841.9ms TimeCoverageRelationStatistics Valid=584, Invalid=3706, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:41:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9346 states. [2021-06-12 20:41:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9346 to 7657. [2021-06-12 20:41:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7657 states, 7656 states have (on average 4.398510971786834) internal successors, (33675), 7656 states have internal predecessors, (33675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 33675 transitions. [2021-06-12 20:41:18,477 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 33675 transitions. Word has length 33 [2021-06-12 20:41:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:18,477 INFO L482 AbstractCegarLoop]: Abstraction has 7657 states and 33675 transitions. [2021-06-12 20:41:18,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 33675 transitions. [2021-06-12 20:41:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:18,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:18,491 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:18,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:18,692 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1709529738, now seen corresponding path program 98 times [2021-06-12 20:41:18,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:18,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427805306] [2021-06-12 20:41:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:18,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:18,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427805306] [2021-06-12 20:41:18,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427805306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:18,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825875328] [2021-06-12 20:41:18,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:18,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:18,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:41:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:19,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:19,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:41:19,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:19,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:19,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:19,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-12 20:41:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:19,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825875328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:19,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:19,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:41:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040765471] [2021-06-12 20:41:19,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:19,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:19,195 INFO L87 Difference]: Start difference. First operand 7657 states and 33675 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:20,807 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-12 20:41:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:22,790 INFO L93 Difference]: Finished difference Result 10038 states and 41890 transitions. [2021-06-12 20:41:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 20:41:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:22,811 INFO L225 Difference]: With dead ends: 10038 [2021-06-12 20:41:22,812 INFO L226 Difference]: Without dead ends: 9959 [2021-06-12 20:41:22,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 3012.9ms TimeCoverageRelationStatistics Valid=711, Invalid=4691, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:41:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9959 states. [2021-06-12 20:41:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9959 to 7617. [2021-06-12 20:41:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7617 states, 7616 states have (on average 4.399422268907563) internal successors, (33506), 7616 states have internal predecessors, (33506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7617 states to 7617 states and 33506 transitions. [2021-06-12 20:41:23,020 INFO L78 Accepts]: Start accepts. Automaton has 7617 states and 33506 transitions. Word has length 33 [2021-06-12 20:41:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:23,020 INFO L482 AbstractCegarLoop]: Abstraction has 7617 states and 33506 transitions. [2021-06-12 20:41:23,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7617 states and 33506 transitions. [2021-06-12 20:41:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:23,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:23,032 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:23,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:23,232 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1229159046, now seen corresponding path program 99 times [2021-06-12 20:41:23,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:23,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208531884] [2021-06-12 20:41:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:23,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:23,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208531884] [2021-06-12 20:41:23,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208531884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:23,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725881657] [2021-06-12 20:41:23,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:23,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:41:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:23,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:23,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:23,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:23,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:41:23,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:23,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:23,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:23,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-12 20:41:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:23,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725881657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:23,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:23,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:41:23,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727858286] [2021-06-12 20:41:23,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:23,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:23,756 INFO L87 Difference]: Start difference. First operand 7617 states and 33506 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:23,882 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-12 20:41:24,428 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-12 20:41:25,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:25,610 INFO L93 Difference]: Finished difference Result 8344 states and 36330 transitions. [2021-06-12 20:41:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:41:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:25,630 INFO L225 Difference]: With dead ends: 8344 [2021-06-12 20:41:25,630 INFO L226 Difference]: Without dead ends: 8313 [2021-06-12 20:41:25,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1444.5ms TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:41:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8313 states. [2021-06-12 20:41:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8313 to 7627. [2021-06-12 20:41:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7627 states, 7626 states have (on average 4.396013637555731) internal successors, (33524), 7626 states have internal predecessors, (33524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 33524 transitions. [2021-06-12 20:41:25,798 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 33524 transitions. Word has length 33 [2021-06-12 20:41:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:25,798 INFO L482 AbstractCegarLoop]: Abstraction has 7627 states and 33524 transitions. [2021-06-12 20:41:25,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 33524 transitions. [2021-06-12 20:41:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:25,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:25,810 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:26,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:26,011 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:26,011 INFO L82 PathProgramCache]: Analyzing trace with hash 527883916, now seen corresponding path program 100 times [2021-06-12 20:41:26,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:26,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907363801] [2021-06-12 20:41:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:26,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:26,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907363801] [2021-06-12 20:41:26,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907363801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:26,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910859783] [2021-06-12 20:41:26,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:26,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:26,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:26,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:26,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:26,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:41:26,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:26,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:26,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:26,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:41:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:26,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910859783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:26,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:26,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:41:26,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004559776] [2021-06-12 20:41:26,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:26,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:26,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:26,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:26,396 INFO L87 Difference]: Start difference. First operand 7627 states and 33524 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:27,500 INFO L93 Difference]: Finished difference Result 8603 states and 37244 transitions. [2021-06-12 20:41:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:41:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:27,520 INFO L225 Difference]: With dead ends: 8603 [2021-06-12 20:41:27,520 INFO L226 Difference]: Without dead ends: 8524 [2021-06-12 20:41:27,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 868.3ms TimeCoverageRelationStatistics Valid=314, Invalid=1942, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:41:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8524 states. [2021-06-12 20:41:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8524 to 7607. [2021-06-12 20:41:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 7606 states have (on average 4.4025769129634496) internal successors, (33486), 7606 states have internal predecessors, (33486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 33486 transitions. [2021-06-12 20:41:27,657 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 33486 transitions. Word has length 33 [2021-06-12 20:41:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:27,657 INFO L482 AbstractCegarLoop]: Abstraction has 7607 states and 33486 transitions. [2021-06-12 20:41:27,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 33486 transitions. [2021-06-12 20:41:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:27,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:27,670 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:27,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 20:41:27,871 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:27,871 INFO L82 PathProgramCache]: Analyzing trace with hash 808042602, now seen corresponding path program 101 times [2021-06-12 20:41:27,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:27,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097091778] [2021-06-12 20:41:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:28,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:28,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097091778] [2021-06-12 20:41:28,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097091778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:28,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529158532] [2021-06-12 20:41:28,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:28,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:41:28,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:28,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:41:28,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:28,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 12 [2021-06-12 20:41:28,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:28,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:28,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:28,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-12 20:41:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:28,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529158532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:28,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:28,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:41:28,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556224399] [2021-06-12 20:41:28,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:28,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:28,507 INFO L87 Difference]: Start difference. First operand 7607 states and 33486 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:31,809 INFO L93 Difference]: Finished difference Result 9224 states and 39739 transitions. [2021-06-12 20:41:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:41:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:31,829 INFO L225 Difference]: With dead ends: 9224 [2021-06-12 20:41:31,830 INFO L226 Difference]: Without dead ends: 9192 [2021-06-12 20:41:31,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 2791.8ms TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:41:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9192 states. [2021-06-12 20:41:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9192 to 7666. [2021-06-12 20:41:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7665 states have (on average 4.399869536855838) internal successors, (33725), 7665 states have internal predecessors, (33725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 33725 transitions. [2021-06-12 20:41:31,963 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 33725 transitions. Word has length 33 [2021-06-12 20:41:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:31,963 INFO L482 AbstractCegarLoop]: Abstraction has 7666 states and 33725 transitions. [2021-06-12 20:41:31,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 33725 transitions. [2021-06-12 20:41:31,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:31,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:31,975 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:32,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 20:41:32,176 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1049192406, now seen corresponding path program 102 times [2021-06-12 20:41:32,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:32,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226042781] [2021-06-12 20:41:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:32,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:32,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226042781] [2021-06-12 20:41:32,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226042781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:32,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489050151] [2021-06-12 20:41:32,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:32,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:41:32,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:32,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:32,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:32,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:32,577 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:41:32,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:41:32,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:41:32,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:32,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:32,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:41:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:32,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489050151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:32,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:32,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:41:32,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958333150] [2021-06-12 20:41:32,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:41:32,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:32,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:41:32,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:41:32,704 INFO L87 Difference]: Start difference. First operand 7666 states and 33725 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:35,288 INFO L93 Difference]: Finished difference Result 9511 states and 39699 transitions. [2021-06-12 20:41:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:41:35,288 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:35,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:35,307 INFO L225 Difference]: With dead ends: 9511 [2021-06-12 20:41:35,308 INFO L226 Difference]: Without dead ends: 9493 [2021-06-12 20:41:35,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2163.7ms TimeCoverageRelationStatistics Valid=467, Invalid=3193, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:41:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9493 states. [2021-06-12 20:41:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9493 to 7657. [2021-06-12 20:41:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7657 states, 7656 states have (on average 4.400600835945664) internal successors, (33691), 7656 states have internal predecessors, (33691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 33691 transitions. [2021-06-12 20:41:35,455 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 33691 transitions. Word has length 33 [2021-06-12 20:41:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:35,455 INFO L482 AbstractCegarLoop]: Abstraction has 7657 states and 33691 transitions. [2021-06-12 20:41:35,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 33691 transitions. [2021-06-12 20:41:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:35,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:35,469 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:35,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:35,669 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1987599684, now seen corresponding path program 103 times [2021-06-12 20:41:35,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:35,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405376202] [2021-06-12 20:41:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:35,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:35,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405376202] [2021-06-12 20:41:35,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405376202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:35,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244657696] [2021-06-12 20:41:35,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:36,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:41:36,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:36,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:36,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:36,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:41:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:36,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244657696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:36,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:36,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:41:36,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364088526] [2021-06-12 20:41:36,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:36,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:36,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:36,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:36,104 INFO L87 Difference]: Start difference. First operand 7657 states and 33691 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:37,350 INFO L93 Difference]: Finished difference Result 8400 states and 36547 transitions. [2021-06-12 20:41:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:41:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:37,373 INFO L225 Difference]: With dead ends: 8400 [2021-06-12 20:41:37,373 INFO L226 Difference]: Without dead ends: 8308 [2021-06-12 20:41:37,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:41:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8308 states. [2021-06-12 20:41:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8308 to 7568. [2021-06-12 20:41:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7568 states, 7567 states have (on average 4.400687194396722) internal successors, (33300), 7567 states have internal predecessors, (33300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7568 states to 7568 states and 33300 transitions. [2021-06-12 20:41:37,509 INFO L78 Accepts]: Start accepts. Automaton has 7568 states and 33300 transitions. Word has length 33 [2021-06-12 20:41:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:37,509 INFO L482 AbstractCegarLoop]: Abstraction has 7568 states and 33300 transitions. [2021-06-12 20:41:37,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7568 states and 33300 transitions. [2021-06-12 20:41:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:37,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:37,522 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:37,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:37,723 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1342179098, now seen corresponding path program 104 times [2021-06-12 20:41:37,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:37,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556982801] [2021-06-12 20:41:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:37,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:37,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556982801] [2021-06-12 20:41:37,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556982801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:37,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190957920] [2021-06-12 20:41:37,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:37,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:37,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:38,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:38,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:41:38,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:38,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:38,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:38,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-12 20:41:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:38,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190957920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:38,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:38,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:41:38,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939453082] [2021-06-12 20:41:38,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:38,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:38,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:38,244 INFO L87 Difference]: Start difference. First operand 7568 states and 33300 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:39,417 INFO L93 Difference]: Finished difference Result 8213 states and 35808 transitions. [2021-06-12 20:41:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:41:39,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:39,437 INFO L225 Difference]: With dead ends: 8213 [2021-06-12 20:41:39,437 INFO L226 Difference]: Without dead ends: 8167 [2021-06-12 20:41:39,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 911.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:41:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2021-06-12 20:41:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 7568. [2021-06-12 20:41:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7568 states, 7567 states have (on average 4.400422888859522) internal successors, (33298), 7567 states have internal predecessors, (33298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7568 states to 7568 states and 33298 transitions. [2021-06-12 20:41:39,562 INFO L78 Accepts]: Start accepts. Automaton has 7568 states and 33298 transitions. Word has length 33 [2021-06-12 20:41:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:39,562 INFO L482 AbstractCegarLoop]: Abstraction has 7568 states and 33298 transitions. [2021-06-12 20:41:39,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7568 states and 33298 transitions. [2021-06-12 20:41:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:39,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:39,575 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:39,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:39,776 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:39,776 INFO L82 PathProgramCache]: Analyzing trace with hash 875471176, now seen corresponding path program 105 times [2021-06-12 20:41:39,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:39,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422489623] [2021-06-12 20:41:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:39,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:39,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422489623] [2021-06-12 20:41:39,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422489623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:39,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281373416] [2021-06-12 20:41:39,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:39,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:41:39,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:40,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:40,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:41:40,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:40,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:40,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:40,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-12 20:41:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:40,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281373416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:40,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:40,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:41:40,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633612645] [2021-06-12 20:41:40,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:40,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:40,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:40,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:40,340 INFO L87 Difference]: Start difference. First operand 7568 states and 33298 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:42,122 INFO L93 Difference]: Finished difference Result 8386 states and 36628 transitions. [2021-06-12 20:41:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:41:42,122 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:42,143 INFO L225 Difference]: With dead ends: 8386 [2021-06-12 20:41:42,143 INFO L226 Difference]: Without dead ends: 8333 [2021-06-12 20:41:42,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1406.5ms TimeCoverageRelationStatistics Valid=246, Invalid=1824, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:41:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8333 states. [2021-06-12 20:41:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8333 to 7554. [2021-06-12 20:41:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 7553 states have (on average 4.402621474910632) internal successors, (33253), 7553 states have internal predecessors, (33253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 33253 transitions. [2021-06-12 20:41:42,273 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 33253 transitions. Word has length 33 [2021-06-12 20:41:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:42,273 INFO L482 AbstractCegarLoop]: Abstraction has 7554 states and 33253 transitions. [2021-06-12 20:41:42,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 33253 transitions. [2021-06-12 20:41:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:42,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:42,286 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:42,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:42,487 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash 793976442, now seen corresponding path program 106 times [2021-06-12 20:41:42,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:42,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940328078] [2021-06-12 20:41:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:42,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940328078] [2021-06-12 20:41:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940328078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110395691] [2021-06-12 20:41:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:42,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:42,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:42,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:42,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:41:42,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:42,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:42,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:42,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-12 20:41:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:42,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110395691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:42,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:42,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:42,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136592464] [2021-06-12 20:41:42,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:42,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:42,996 INFO L87 Difference]: Start difference. First operand 7554 states and 33253 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:44,139 INFO L93 Difference]: Finished difference Result 7951 states and 34856 transitions. [2021-06-12 20:41:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:41:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:44,157 INFO L225 Difference]: With dead ends: 7951 [2021-06-12 20:41:44,157 INFO L226 Difference]: Without dead ends: 7936 [2021-06-12 20:41:44,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:41:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7936 states. [2021-06-12 20:41:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7936 to 7589. [2021-06-12 20:41:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 4.40326831839747) internal successors, (33412), 7588 states have internal predecessors, (33412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 33412 transitions. [2021-06-12 20:41:44,280 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 33412 transitions. Word has length 33 [2021-06-12 20:41:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:44,280 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 33412 transitions. [2021-06-12 20:41:44,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:44,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 33412 transitions. [2021-06-12 20:41:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:44,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:44,292 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:44,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 20:41:44,493 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash 729342936, now seen corresponding path program 107 times [2021-06-12 20:41:44,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:44,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335734762] [2021-06-12 20:41:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:44,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335734762] [2021-06-12 20:41:44,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335734762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9780896] [2021-06-12 20:41:44,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:44,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:41:44,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:44,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 20:41:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:45,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:45,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:45,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:45,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:45,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:41:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9780896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:45,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:45,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:41:45,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907996317] [2021-06-12 20:41:45,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:45,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:45,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:45,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:45,067 INFO L87 Difference]: Start difference. First operand 7589 states and 33412 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:45,919 INFO L93 Difference]: Finished difference Result 7977 states and 34896 transitions. [2021-06-12 20:41:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:41:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:45,937 INFO L225 Difference]: With dead ends: 7977 [2021-06-12 20:41:45,937 INFO L226 Difference]: Without dead ends: 7962 [2021-06-12 20:41:45,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:41:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2021-06-12 20:41:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 7592. [2021-06-12 20:41:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7592 states, 7591 states have (on average 4.402977209853774) internal successors, (33423), 7591 states have internal predecessors, (33423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7592 states to 7592 states and 33423 transitions. [2021-06-12 20:41:46,064 INFO L78 Accepts]: Start accepts. Automaton has 7592 states and 33423 transitions. Word has length 33 [2021-06-12 20:41:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:46,064 INFO L482 AbstractCegarLoop]: Abstraction has 7592 states and 33423 transitions. [2021-06-12 20:41:46,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 7592 states and 33423 transitions. [2021-06-12 20:41:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:46,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:46,076 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:46,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 20:41:46,277 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:46,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1163372282, now seen corresponding path program 108 times [2021-06-12 20:41:46,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:46,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207249605] [2021-06-12 20:41:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:46,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:46,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207249605] [2021-06-12 20:41:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207249605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:46,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560011345] [2021-06-12 20:41:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:46,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:41:46,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:46,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:41:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:46,713 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:41:46,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:41:46,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:41:46,743 INFO L628 ElimStorePlain]: treesize reduction 82, result has 22.6 percent of original size [2021-06-12 20:41:46,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:46,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-06-12 20:41:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:46,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560011345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:46,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:46,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:41:46,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505268804] [2021-06-12 20:41:46,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:41:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:41:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:41:46,906 INFO L87 Difference]: Start difference. First operand 7592 states and 33423 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:48,227 INFO L93 Difference]: Finished difference Result 7908 states and 34625 transitions. [2021-06-12 20:41:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:41:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:48,245 INFO L225 Difference]: With dead ends: 7908 [2021-06-12 20:41:48,245 INFO L226 Difference]: Without dead ends: 7893 [2021-06-12 20:41:48,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1094.7ms TimeCoverageRelationStatistics Valid=182, Invalid=1980, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:41:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7893 states. [2021-06-12 20:41:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7893 to 7592. [2021-06-12 20:41:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7592 states, 7591 states have (on average 4.402977209853774) internal successors, (33423), 7591 states have internal predecessors, (33423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7592 states to 7592 states and 33423 transitions. [2021-06-12 20:41:48,370 INFO L78 Accepts]: Start accepts. Automaton has 7592 states and 33423 transitions. Word has length 33 [2021-06-12 20:41:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:48,370 INFO L482 AbstractCegarLoop]: Abstraction has 7592 states and 33423 transitions. [2021-06-12 20:41:48,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7592 states and 33423 transitions. [2021-06-12 20:41:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:48,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:48,383 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:48,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-12 20:41:48,584 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash 810232792, now seen corresponding path program 109 times [2021-06-12 20:41:48,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:48,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759227813] [2021-06-12 20:41:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:48,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:48,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759227813] [2021-06-12 20:41:48,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759227813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:48,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310943580] [2021-06-12 20:41:48,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:48,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:48,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:41:48,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:48,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:48,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:48,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:41:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:49,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310943580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:49,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:49,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:49,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565246053] [2021-06-12 20:41:49,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:49,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:49,033 INFO L87 Difference]: Start difference. First operand 7592 states and 33423 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:50,280 INFO L93 Difference]: Finished difference Result 8679 states and 37740 transitions. [2021-06-12 20:41:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:41:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:50,300 INFO L225 Difference]: With dead ends: 8679 [2021-06-12 20:41:50,301 INFO L226 Difference]: Without dead ends: 8664 [2021-06-12 20:41:50,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 937.2ms TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:41:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2021-06-12 20:41:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 7696. [2021-06-12 20:41:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7696 states, 7695 states have (on average 4.405458089668616) internal successors, (33900), 7695 states have internal predecessors, (33900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7696 states to 7696 states and 33900 transitions. [2021-06-12 20:41:50,445 INFO L78 Accepts]: Start accepts. Automaton has 7696 states and 33900 transitions. Word has length 33 [2021-06-12 20:41:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:50,445 INFO L482 AbstractCegarLoop]: Abstraction has 7696 states and 33900 transitions. [2021-06-12 20:41:50,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:50,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7696 states and 33900 transitions. [2021-06-12 20:41:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:50,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:50,458 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:50,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:50,659 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1047002216, now seen corresponding path program 110 times [2021-06-12 20:41:50,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:50,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405205287] [2021-06-12 20:41:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:50,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405205287] [2021-06-12 20:41:50,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405205287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232274796] [2021-06-12 20:41:50,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:50,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:50,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:41:50,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:51,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:51,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:41:51,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:51,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:51,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:51,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-12 20:41:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:51,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232274796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:51,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:51,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:41:51,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826604363] [2021-06-12 20:41:51,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:51,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:51,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:51,196 INFO L87 Difference]: Start difference. First operand 7696 states and 33900 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:51,806 INFO L93 Difference]: Finished difference Result 8113 states and 35526 transitions. [2021-06-12 20:41:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:41:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:51,825 INFO L225 Difference]: With dead ends: 8113 [2021-06-12 20:41:51,825 INFO L226 Difference]: Without dead ends: 8099 [2021-06-12 20:41:51,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:41:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2021-06-12 20:41:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 7688. [2021-06-12 20:41:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 4.406530506049174) internal successors, (33873), 7687 states have internal predecessors, (33873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 33873 transitions. [2021-06-12 20:41:52,035 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 33873 transitions. Word has length 33 [2021-06-12 20:41:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:52,035 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 33873 transitions. [2021-06-12 20:41:52,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 33873 transitions. [2021-06-12 20:41:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:52,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:52,049 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:52,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:52,250 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:52,250 INFO L82 PathProgramCache]: Analyzing trace with hash -746274642, now seen corresponding path program 111 times [2021-06-12 20:41:52,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:52,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472532947] [2021-06-12 20:41:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:52,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:52,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472532947] [2021-06-12 20:41:52,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472532947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:52,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950831528] [2021-06-12 20:41:52,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:52,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:41:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:52,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:52,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:41:52,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:52,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:52,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:52,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-12 20:41:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:52,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950831528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:52,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:52,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:41:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114401998] [2021-06-12 20:41:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:41:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:41:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:41:52,849 INFO L87 Difference]: Start difference. First operand 7688 states and 33873 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:53,552 INFO L93 Difference]: Finished difference Result 8096 states and 35418 transitions. [2021-06-12 20:41:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:41:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:53,571 INFO L225 Difference]: With dead ends: 8096 [2021-06-12 20:41:53,571 INFO L226 Difference]: Without dead ends: 8081 [2021-06-12 20:41:53,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:41:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2021-06-12 20:41:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 7688. [2021-06-12 20:41:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 4.406530506049174) internal successors, (33873), 7687 states have internal predecessors, (33873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 33873 transitions. [2021-06-12 20:41:53,700 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 33873 transitions. Word has length 33 [2021-06-12 20:41:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:53,700 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 33873 transitions. [2021-06-12 20:41:53,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 33873 transitions. [2021-06-12 20:41:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:53,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:53,713 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:53,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-12 20:41:53,913 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash -312245296, now seen corresponding path program 112 times [2021-06-12 20:41:53,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:53,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22325475] [2021-06-12 20:41:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:54,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22325475] [2021-06-12 20:41:54,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22325475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737020807] [2021-06-12 20:41:54,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:54,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:54,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:54,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:41:54,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:54,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:54,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:54,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:54,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:54,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:41:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:54,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737020807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:54,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:54,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:54,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667194153] [2021-06-12 20:41:54,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:54,347 INFO L87 Difference]: Start difference. First operand 7688 states and 33873 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:55,898 INFO L93 Difference]: Finished difference Result 8317 states and 36345 transitions. [2021-06-12 20:41:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:41:55,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:55,917 INFO L225 Difference]: With dead ends: 8317 [2021-06-12 20:41:55,917 INFO L226 Difference]: Without dead ends: 8302 [2021-06-12 20:41:55,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1153.2ms TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:41:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2021-06-12 20:41:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 7688. [2021-06-12 20:41:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 4.406530506049174) internal successors, (33873), 7687 states have internal predecessors, (33873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 33873 transitions. [2021-06-12 20:41:56,043 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 33873 transitions. Word has length 33 [2021-06-12 20:41:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:56,043 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 33873 transitions. [2021-06-12 20:41:56,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 33873 transitions. [2021-06-12 20:41:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:56,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:56,056 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:56,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-12 20:41:56,257 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1772347502, now seen corresponding path program 113 times [2021-06-12 20:41:56,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:56,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753376438] [2021-06-12 20:41:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:56,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:56,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753376438] [2021-06-12 20:41:56,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753376438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:56,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778882333] [2021-06-12 20:41:56,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:56,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:41:56,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 20:41:56,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:56,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:56,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:56,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:56,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:56,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:41:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:56,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778882333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:56,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:56,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:41:56,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094449841] [2021-06-12 20:41:56,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:56,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:56,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:56,703 INFO L87 Difference]: Start difference. First operand 7688 states and 33873 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:57,674 INFO L93 Difference]: Finished difference Result 8366 states and 36490 transitions. [2021-06-12 20:41:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:41:57,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:41:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:57,693 INFO L225 Difference]: With dead ends: 8366 [2021-06-12 20:41:57,693 INFO L226 Difference]: Without dead ends: 8331 [2021-06-12 20:41:57,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:41:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8331 states. [2021-06-12 20:41:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 7608. [2021-06-12 20:41:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7607 states have (on average 4.410280005258315) internal successors, (33549), 7607 states have internal predecessors, (33549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 33549 transitions. [2021-06-12 20:41:57,825 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 33549 transitions. Word has length 33 [2021-06-12 20:41:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:57,825 INFO L482 AbstractCegarLoop]: Abstraction has 7608 states and 33549 transitions. [2021-06-12 20:41:57,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 33549 transitions. [2021-06-12 20:41:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:41:57,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:57,837 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:58,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-12 20:41:58,038 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1477181358, now seen corresponding path program 114 times [2021-06-12 20:41:58,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:58,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510263330] [2021-06-12 20:41:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:58,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:58,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510263330] [2021-06-12 20:41:58,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510263330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:58,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153364371] [2021-06-12 20:41:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:58,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:41:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:41:58,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:58,495 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:41:58,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:41:58,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:41:58,532 INFO L628 ElimStorePlain]: treesize reduction 75, result has 21.1 percent of original size [2021-06-12 20:41:58,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:41:58,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-12 20:41:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:58,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153364371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:58,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:58,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-12 20:41:58,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812897047] [2021-06-12 20:41:58,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:58,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:58,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:58,568 INFO L87 Difference]: Start difference. First operand 7608 states and 33549 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:00,066 INFO L93 Difference]: Finished difference Result 8486 states and 37127 transitions. [2021-06-12 20:42:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:42:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:00,085 INFO L225 Difference]: With dead ends: 8486 [2021-06-12 20:42:00,085 INFO L226 Difference]: Without dead ends: 8453 [2021-06-12 20:42:00,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:42:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-06-12 20:42:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 7703. [2021-06-12 20:42:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7703 states, 7702 states have (on average 4.415736172422747) internal successors, (34010), 7702 states have internal predecessors, (34010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7703 states to 7703 states and 34010 transitions. [2021-06-12 20:42:00,204 INFO L78 Accepts]: Start accepts. Automaton has 7703 states and 34010 transitions. Word has length 33 [2021-06-12 20:42:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:00,204 INFO L482 AbstractCegarLoop]: Abstraction has 7703 states and 34010 transitions. [2021-06-12 20:42:00,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 7703 states and 34010 transitions. [2021-06-12 20:42:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:00,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:00,217 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:00,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:00,419 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:00,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1043152012, now seen corresponding path program 115 times [2021-06-12 20:42:00,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:00,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928737841] [2021-06-12 20:42:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:00,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928737841] [2021-06-12 20:42:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928737841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158079706] [2021-06-12 20:42:00,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:00,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:00,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:00,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:00,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:00,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:00,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:42:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:00,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158079706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:00,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:00,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:00,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443278809] [2021-06-12 20:42:00,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:00,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:00,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:00,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:00,842 INFO L87 Difference]: Start difference. First operand 7703 states and 34010 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:02,426 INFO L93 Difference]: Finished difference Result 8531 states and 37355 transitions. [2021-06-12 20:42:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:42:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:02,446 INFO L225 Difference]: With dead ends: 8531 [2021-06-12 20:42:02,446 INFO L226 Difference]: Without dead ends: 8501 [2021-06-12 20:42:02,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1096.1ms TimeCoverageRelationStatistics Valid=298, Invalid=2354, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:42:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-12 20:42:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 7724. [2021-06-12 20:42:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 7723 states have (on average 4.417583840476499) internal successors, (34117), 7723 states have internal predecessors, (34117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 34117 transitions. [2021-06-12 20:42:02,621 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 34117 transitions. Word has length 33 [2021-06-12 20:42:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:02,621 INFO L482 AbstractCegarLoop]: Abstraction has 7724 states and 34117 transitions. [2021-06-12 20:42:02,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 34117 transitions. [2021-06-12 20:42:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:02,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:02,635 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:02,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-12 20:42:02,837 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1396291502, now seen corresponding path program 116 times [2021-06-12 20:42:02,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:02,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775523448] [2021-06-12 20:42:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:02,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:02,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775523448] [2021-06-12 20:42:02,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775523448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:02,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935687699] [2021-06-12 20:42:02,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:03,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:03,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:42:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:03,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:03,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:42:03,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:03,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:03,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:03,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-12 20:42:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:03,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935687699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:03,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:03,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:42:03,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620807824] [2021-06-12 20:42:03,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:42:03,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:42:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:42:03,396 INFO L87 Difference]: Start difference. First operand 7724 states and 34117 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:04,660 INFO L93 Difference]: Finished difference Result 8614 states and 37519 transitions. [2021-06-12 20:42:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:42:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:04,679 INFO L225 Difference]: With dead ends: 8614 [2021-06-12 20:42:04,680 INFO L226 Difference]: Without dead ends: 8584 [2021-06-12 20:42:04,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 909.9ms TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:42:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8584 states. [2021-06-12 20:42:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8584 to 7731. [2021-06-12 20:42:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 4.416946959896507) internal successors, (34143), 7730 states have internal predecessors, (34143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 34143 transitions. [2021-06-12 20:42:04,820 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 34143 transitions. Word has length 33 [2021-06-12 20:42:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:04,821 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 34143 transitions. [2021-06-12 20:42:04,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 34143 transitions. [2021-06-12 20:42:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:04,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:04,834 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:05,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-12 20:42:05,034 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1585133068, now seen corresponding path program 117 times [2021-06-12 20:42:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:05,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688362694] [2021-06-12 20:42:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:05,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:05,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688362694] [2021-06-12 20:42:05,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688362694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:05,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819243173] [2021-06-12 20:42:05,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:05,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:42:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:42:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:05,524 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:42:05,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:42:05,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:42:05,560 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-12 20:42:05,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:05,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:42:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819243173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:05,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:05,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:42:05,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049489320] [2021-06-12 20:42:05,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:42:05,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:42:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:42:05,670 INFO L87 Difference]: Start difference. First operand 7731 states and 34143 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:07,130 INFO L93 Difference]: Finished difference Result 8592 states and 37381 transitions. [2021-06-12 20:42:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:07,150 INFO L225 Difference]: With dead ends: 8592 [2021-06-12 20:42:07,150 INFO L226 Difference]: Without dead ends: 8574 [2021-06-12 20:42:07,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1077.7ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:42:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8574 states. [2021-06-12 20:42:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8574 to 7731. [2021-06-12 20:42:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 4.416946959896507) internal successors, (34143), 7730 states have internal predecessors, (34143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 34143 transitions. [2021-06-12 20:42:07,303 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 34143 transitions. Word has length 33 [2021-06-12 20:42:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:07,303 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 34143 transitions. [2021-06-12 20:42:07,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 34143 transitions. [2021-06-12 20:42:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:07,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:07,316 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:07,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 20:42:07,516 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1041440786, now seen corresponding path program 118 times [2021-06-12 20:42:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:07,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347446545] [2021-06-12 20:42:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:07,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347446545] [2021-06-12 20:42:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347446545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824002486] [2021-06-12 20:42:07,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:07,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:07,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:07,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:42:07,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:07,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:07,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:07,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:42:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:08,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824002486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:08,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:08,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:42:08,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490187239] [2021-06-12 20:42:08,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:08,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:08,014 INFO L87 Difference]: Start difference. First operand 7731 states and 34143 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:09,269 INFO L93 Difference]: Finished difference Result 9047 states and 39227 transitions. [2021-06-12 20:42:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:42:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:09,290 INFO L225 Difference]: With dead ends: 9047 [2021-06-12 20:42:09,291 INFO L226 Difference]: Without dead ends: 9010 [2021-06-12 20:42:09,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1006.7ms TimeCoverageRelationStatistics Valid=302, Invalid=2148, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:42:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-06-12 20:42:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 7834. [2021-06-12 20:42:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7834 states, 7833 states have (on average 4.420145538108005) internal successors, (34623), 7833 states have internal predecessors, (34623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7834 states to 7834 states and 34623 transitions. [2021-06-12 20:42:09,442 INFO L78 Accepts]: Start accepts. Automaton has 7834 states and 34623 transitions. Word has length 33 [2021-06-12 20:42:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:09,442 INFO L482 AbstractCegarLoop]: Abstraction has 7834 states and 34623 transitions. [2021-06-12 20:42:09,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7834 states and 34623 transitions. [2021-06-12 20:42:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:09,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:09,456 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:09,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:09,656 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:09,656 INFO L82 PathProgramCache]: Analyzing trace with hash -123357794, now seen corresponding path program 119 times [2021-06-12 20:42:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:09,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157859791] [2021-06-12 20:42:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:09,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:09,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157859791] [2021-06-12 20:42:09,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157859791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:09,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107408006] [2021-06-12 20:42:09,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:09,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:42:09,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:09,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:09,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:42:09,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:09,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:10,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:10,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:42:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:10,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107408006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:10,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:10,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:10,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508178157] [2021-06-12 20:42:10,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:10,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:10,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:10,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:10,070 INFO L87 Difference]: Start difference. First operand 7834 states and 34623 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:11,766 INFO L93 Difference]: Finished difference Result 9387 states and 40647 transitions. [2021-06-12 20:42:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:42:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:11,787 INFO L225 Difference]: With dead ends: 9387 [2021-06-12 20:42:11,788 INFO L226 Difference]: Without dead ends: 9341 [2021-06-12 20:42:11,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1204.5ms TimeCoverageRelationStatistics Valid=369, Invalid=2601, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:42:11,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-12 20:42:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7791. [2021-06-12 20:42:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 4.42400513478819) internal successors, (34463), 7790 states have internal predecessors, (34463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 34463 transitions. [2021-06-12 20:42:11,938 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 34463 transitions. Word has length 33 [2021-06-12 20:42:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:11,939 INFO L482 AbstractCegarLoop]: Abstraction has 7791 states and 34463 transitions. [2021-06-12 20:42:11,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 34463 transitions. [2021-06-12 20:42:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:11,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:11,951 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:12,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:12,151 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:12,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1236417738, now seen corresponding path program 120 times [2021-06-12 20:42:12,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:12,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223488735] [2021-06-12 20:42:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:12,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:12,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223488735] [2021-06-12 20:42:12,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223488735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:12,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724887556] [2021-06-12 20:42:12,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:12,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:42:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:12,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:12,520 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:42:12,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:42:12,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:12,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:12,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:12,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:42:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:12,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724887556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:12,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:12,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:42:12,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011912435] [2021-06-12 20:42:12,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:42:12,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:42:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:42:12,773 INFO L87 Difference]: Start difference. First operand 7791 states and 34463 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:14,351 INFO L93 Difference]: Finished difference Result 8405 states and 36936 transitions. [2021-06-12 20:42:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:42:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:14,370 INFO L225 Difference]: With dead ends: 8405 [2021-06-12 20:42:14,371 INFO L226 Difference]: Without dead ends: 8376 [2021-06-12 20:42:14,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1304.1ms TimeCoverageRelationStatistics Valid=266, Invalid=2386, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:42:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-06-12 20:42:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 7824. [2021-06-12 20:42:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 4.423878307554647) internal successors, (34608), 7823 states have internal predecessors, (34608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 34608 transitions. [2021-06-12 20:42:14,500 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 34608 transitions. Word has length 33 [2021-06-12 20:42:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:14,500 INFO L482 AbstractCegarLoop]: Abstraction has 7824 states and 34608 transitions. [2021-06-12 20:42:14,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 34608 transitions. [2021-06-12 20:42:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:14,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:14,513 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:14,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:14,713 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1589557228, now seen corresponding path program 121 times [2021-06-12 20:42:14,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:14,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908739094] [2021-06-12 20:42:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:14,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908739094] [2021-06-12 20:42:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908739094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553423144] [2021-06-12 20:42:14,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:14,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:14,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:15,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:15,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:42:15,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:15,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:15,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:15,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:42:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:15,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553423144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:15,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:15,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:15,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175351133] [2021-06-12 20:42:15,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:15,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:15,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:15,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:15,123 INFO L87 Difference]: Start difference. First operand 7824 states and 34608 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:16,643 INFO L93 Difference]: Finished difference Result 9078 states and 39532 transitions. [2021-06-12 20:42:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:42:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:16,663 INFO L225 Difference]: With dead ends: 9078 [2021-06-12 20:42:16,663 INFO L226 Difference]: Without dead ends: 9048 [2021-06-12 20:42:16,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1193.4ms TimeCoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:42:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2021-06-12 20:42:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 7961. [2021-06-12 20:42:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7961 states, 7960 states have (on average 4.426884422110553) internal successors, (35238), 7960 states have internal predecessors, (35238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7961 states to 7961 states and 35238 transitions. [2021-06-12 20:42:16,803 INFO L78 Accepts]: Start accepts. Automaton has 7961 states and 35238 transitions. Word has length 33 [2021-06-12 20:42:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:16,803 INFO L482 AbstractCegarLoop]: Abstraction has 7961 states and 35238 transitions. [2021-06-12 20:42:16,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7961 states and 35238 transitions. [2021-06-12 20:42:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:16,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:16,816 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:17,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-12 20:42:17,017 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:17,017 INFO L82 PathProgramCache]: Analyzing trace with hash 848175060, now seen corresponding path program 122 times [2021-06-12 20:42:17,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:17,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538124719] [2021-06-12 20:42:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:17,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538124719] [2021-06-12 20:42:17,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538124719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812226664] [2021-06-12 20:42:17,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:17,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:42:17,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:17,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:17,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:17,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:17,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:17,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:17,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 20:42:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:17,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812226664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:17,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:17,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:42:17,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10672559] [2021-06-12 20:42:17,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:17,482 INFO L87 Difference]: Start difference. First operand 7961 states and 35238 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:19,743 INFO L93 Difference]: Finished difference Result 8788 states and 38396 transitions. [2021-06-12 20:42:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:42:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:19,763 INFO L225 Difference]: With dead ends: 8788 [2021-06-12 20:42:19,763 INFO L226 Difference]: Without dead ends: 8743 [2021-06-12 20:42:19,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1835.6ms TimeCoverageRelationStatistics Valid=582, Invalid=3974, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:42:19,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8743 states. [2021-06-12 20:42:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8743 to 7902. [2021-06-12 20:42:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7902 states, 7901 states have (on average 4.429819010251867) internal successors, (35000), 7901 states have internal predecessors, (35000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7902 states to 7902 states and 35000 transitions. [2021-06-12 20:42:19,900 INFO L78 Accepts]: Start accepts. Automaton has 7902 states and 35000 transitions. Word has length 33 [2021-06-12 20:42:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:19,900 INFO L482 AbstractCegarLoop]: Abstraction has 7902 states and 35000 transitions. [2021-06-12 20:42:19,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7902 states and 35000 transitions. [2021-06-12 20:42:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:19,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:19,913 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:20,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-12 20:42:20,113 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1958313838, now seen corresponding path program 123 times [2021-06-12 20:42:20,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:20,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817796470] [2021-06-12 20:42:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:20,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:20,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817796470] [2021-06-12 20:42:20,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817796470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:20,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495589819] [2021-06-12 20:42:20,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:20,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:42:20,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:42:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:20,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:20,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:42:20,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:20,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:20,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:20,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-12 20:42:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:20,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495589819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:20,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:20,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:42:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775640335] [2021-06-12 20:42:20,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:42:20,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:42:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:42:20,691 INFO L87 Difference]: Start difference. First operand 7902 states and 35000 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:21,992 INFO L93 Difference]: Finished difference Result 8918 states and 38987 transitions. [2021-06-12 20:42:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:42:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:22,014 INFO L225 Difference]: With dead ends: 8918 [2021-06-12 20:42:22,014 INFO L226 Difference]: Without dead ends: 8888 [2021-06-12 20:42:22,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:42:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-06-12 20:42:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 7972. [2021-06-12 20:42:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7972 states, 7971 states have (on average 4.431062601932004) internal successors, (35320), 7971 states have internal predecessors, (35320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:22,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 35320 transitions. [2021-06-12 20:42:22,161 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 35320 transitions. Word has length 33 [2021-06-12 20:42:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:22,161 INFO L482 AbstractCegarLoop]: Abstraction has 7972 states and 35320 transitions. [2021-06-12 20:42:22,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 35320 transitions. [2021-06-12 20:42:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:22,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:22,174 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:22,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:22,375 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:22,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:22,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2147155404, now seen corresponding path program 124 times [2021-06-12 20:42:22,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:22,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941774771] [2021-06-12 20:42:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:22,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:22,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941774771] [2021-06-12 20:42:22,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941774771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:22,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526941988] [2021-06-12 20:42:22,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:22,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:22,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:22,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:22,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:22,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:22,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:22,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:22,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:42:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:22,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526941988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:22,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:22,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:22,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647375973] [2021-06-12 20:42:22,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:22,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:22,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:22,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:22,837 INFO L87 Difference]: Start difference. First operand 7972 states and 35320 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:24,202 INFO L93 Difference]: Finished difference Result 9321 states and 40526 transitions. [2021-06-12 20:42:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:42:24,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:24,223 INFO L225 Difference]: With dead ends: 9321 [2021-06-12 20:42:24,223 INFO L226 Difference]: Without dead ends: 9303 [2021-06-12 20:42:24,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1130.7ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:42:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2021-06-12 20:42:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 8128. [2021-06-12 20:42:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8128 states, 8127 states have (on average 4.434969853574505) internal successors, (36043), 8127 states have internal predecessors, (36043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8128 states to 8128 states and 36043 transitions. [2021-06-12 20:42:24,373 INFO L78 Accepts]: Start accepts. Automaton has 8128 states and 36043 transitions. Word has length 33 [2021-06-12 20:42:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:24,373 INFO L482 AbstractCegarLoop]: Abstraction has 8128 states and 36043 transitions. [2021-06-12 20:42:24,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 8128 states and 36043 transitions. [2021-06-12 20:42:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:24,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:24,387 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:24,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:24,588 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash 479418450, now seen corresponding path program 125 times [2021-06-12 20:42:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:24,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105839957] [2021-06-12 20:42:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:24,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:24,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105839957] [2021-06-12 20:42:24,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105839957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:24,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395623510] [2021-06-12 20:42:24,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:24,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:42:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:24,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:24,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:24,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:42:24,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:24,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:24,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:24,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:42:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:24,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395623510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:24,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:24,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:42:24,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539844763] [2021-06-12 20:42:24,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:24,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:24,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:24,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:24,988 INFO L87 Difference]: Start difference. First operand 8128 states and 36043 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:26,392 INFO L93 Difference]: Finished difference Result 9356 states and 40639 transitions. [2021-06-12 20:42:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:26,413 INFO L225 Difference]: With dead ends: 9356 [2021-06-12 20:42:26,413 INFO L226 Difference]: Without dead ends: 9307 [2021-06-12 20:42:26,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1129.7ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:42:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-06-12 20:42:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 8091. [2021-06-12 20:42:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8091 states, 8090 states have (on average 4.435970333745365) internal successors, (35887), 8090 states have internal predecessors, (35887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 35887 transitions. [2021-06-12 20:42:26,554 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 35887 transitions. Word has length 33 [2021-06-12 20:42:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:26,554 INFO L482 AbstractCegarLoop]: Abstraction has 8091 states and 35887 transitions. [2021-06-12 20:42:26,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 35887 transitions. [2021-06-12 20:42:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:26,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:26,567 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:26,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:26,767 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:26,768 INFO L82 PathProgramCache]: Analyzing trace with hash -362879790, now seen corresponding path program 126 times [2021-06-12 20:42:26,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:26,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063814417] [2021-06-12 20:42:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:26,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:26,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063814417] [2021-06-12 20:42:26,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063814417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:26,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442359965] [2021-06-12 20:42:26,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:26,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:42:26,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:27,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:27,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:42:27,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:27,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:27,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:27,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:42:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:27,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442359965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:27,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:27,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:42:27,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675132826] [2021-06-12 20:42:27,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:42:27,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:27,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:42:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:42:27,302 INFO L87 Difference]: Start difference. First operand 8091 states and 35887 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:29,247 INFO L93 Difference]: Finished difference Result 8894 states and 39182 transitions. [2021-06-12 20:42:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:42:29,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:29,267 INFO L225 Difference]: With dead ends: 8894 [2021-06-12 20:42:29,268 INFO L226 Difference]: Without dead ends: 8875 [2021-06-12 20:42:29,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1449.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:42:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2021-06-12 20:42:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 8079. [2021-06-12 20:42:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 4.436865560782372) internal successors, (35841), 8078 states have internal predecessors, (35841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 35841 transitions. [2021-06-12 20:42:29,402 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 35841 transitions. Word has length 33 [2021-06-12 20:42:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:29,402 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 35841 transitions. [2021-06-12 20:42:29,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 35841 transitions. [2021-06-12 20:42:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:29,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:29,415 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:29,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:29,616 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1196989280, now seen corresponding path program 127 times [2021-06-12 20:42:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:29,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443848255] [2021-06-12 20:42:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:29,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:29,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443848255] [2021-06-12 20:42:29,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443848255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:29,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849927370] [2021-06-12 20:42:29,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:29,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:29,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:29,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:29,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:29,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:29,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:42:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:30,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849927370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:30,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:30,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:30,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488536798] [2021-06-12 20:42:30,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:30,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:30,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:30,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:30,058 INFO L87 Difference]: Start difference. First operand 8079 states and 35841 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:31,686 INFO L93 Difference]: Finished difference Result 9800 states and 42585 transitions. [2021-06-12 20:42:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:42:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:31,709 INFO L225 Difference]: With dead ends: 9800 [2021-06-12 20:42:31,710 INFO L226 Difference]: Without dead ends: 9755 [2021-06-12 20:42:31,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1133.4ms TimeCoverageRelationStatistics Valid=308, Invalid=2344, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:42:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2021-06-12 20:42:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 8186. [2021-06-12 20:42:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8186 states, 8185 states have (on average 4.440073304825901) internal successors, (36342), 8185 states have internal predecessors, (36342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8186 states to 8186 states and 36342 transitions. [2021-06-12 20:42:31,870 INFO L78 Accepts]: Start accepts. Automaton has 8186 states and 36342 transitions. Word has length 33 [2021-06-12 20:42:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:31,870 INFO L482 AbstractCegarLoop]: Abstraction has 8186 states and 36342 transitions. [2021-06-12 20:42:31,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 8186 states and 36342 transitions. [2021-06-12 20:42:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:31,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:31,883 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:32,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-12 20:42:32,084 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:32,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1013385218, now seen corresponding path program 128 times [2021-06-12 20:42:32,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:32,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803414602] [2021-06-12 20:42:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:32,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:32,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803414602] [2021-06-12 20:42:32,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803414602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:32,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177309609] [2021-06-12 20:42:32,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:32,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:32,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:32,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:42:32,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:32,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:32,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:42:32,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:32,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:32,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:32,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:39 [2021-06-12 20:42:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:32,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177309609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:32,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:32,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:42:32,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900415506] [2021-06-12 20:42:32,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:32,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:32,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:32,550 INFO L87 Difference]: Start difference. First operand 8186 states and 36342 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:34,316 INFO L93 Difference]: Finished difference Result 9320 states and 40753 transitions. [2021-06-12 20:42:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:42:34,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:34,337 INFO L225 Difference]: With dead ends: 9320 [2021-06-12 20:42:34,337 INFO L226 Difference]: Without dead ends: 9285 [2021-06-12 20:42:34,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1373.9ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:42:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9285 states. [2021-06-12 20:42:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9285 to 8115. [2021-06-12 20:42:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8115 states, 8114 states have (on average 4.443061375400542) internal successors, (36051), 8114 states have internal predecessors, (36051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8115 states to 8115 states and 36051 transitions. [2021-06-12 20:42:34,492 INFO L78 Accepts]: Start accepts. Automaton has 8115 states and 36051 transitions. Word has length 33 [2021-06-12 20:42:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:34,492 INFO L482 AbstractCegarLoop]: Abstraction has 8115 states and 36051 transitions. [2021-06-12 20:42:34,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 8115 states and 36051 transitions. [2021-06-12 20:42:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:34,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:34,506 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:34,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-12 20:42:34,709 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash -811191210, now seen corresponding path program 129 times [2021-06-12 20:42:34,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:34,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976897980] [2021-06-12 20:42:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:34,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:34,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976897980] [2021-06-12 20:42:34,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976897980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:34,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875054962] [2021-06-12 20:42:34,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:34,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:42:34,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:35,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:35,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:42:35,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:35,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:35,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:35,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:42:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:35,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875054962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:35,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:35,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:42:35,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717797095] [2021-06-12 20:42:35,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:42:35,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:35,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:42:35,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:42:35,193 INFO L87 Difference]: Start difference. First operand 8115 states and 36051 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:35,496 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-12 20:42:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:36,333 INFO L93 Difference]: Finished difference Result 8608 states and 38009 transitions. [2021-06-12 20:42:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:42:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:36,354 INFO L225 Difference]: With dead ends: 8608 [2021-06-12 20:42:36,354 INFO L226 Difference]: Without dead ends: 8595 [2021-06-12 20:42:36,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1115.8ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:42:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2021-06-12 20:42:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 8112. [2021-06-12 20:42:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8112 states, 8111 states have (on average 4.4434718283812105) internal successors, (36041), 8111 states have internal predecessors, (36041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 36041 transitions. [2021-06-12 20:42:36,483 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 36041 transitions. Word has length 33 [2021-06-12 20:42:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:36,483 INFO L482 AbstractCegarLoop]: Abstraction has 8112 states and 36041 transitions. [2021-06-12 20:42:36,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 36041 transitions. [2021-06-12 20:42:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:36,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:36,496 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:36,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-12 20:42:36,697 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1490078986, now seen corresponding path program 130 times [2021-06-12 20:42:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:36,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405594462] [2021-06-12 20:42:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:36,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:36,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405594462] [2021-06-12 20:42:36,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405594462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:36,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850397348] [2021-06-12 20:42:36,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:36,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:36,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:36,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:37,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:37,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:42:37,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:37,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:37,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:37,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:42:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:37,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850397348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:37,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:37,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663742381] [2021-06-12 20:42:37,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:37,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:37,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:37,140 INFO L87 Difference]: Start difference. First operand 8112 states and 36041 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:38,457 INFO L93 Difference]: Finished difference Result 9563 states and 41697 transitions. [2021-06-12 20:42:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:38,479 INFO L225 Difference]: With dead ends: 9563 [2021-06-12 20:42:38,479 INFO L226 Difference]: Without dead ends: 9533 [2021-06-12 20:42:38,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1159.0ms TimeCoverageRelationStatistics Valid=468, Invalid=2288, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:42:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-12 20:42:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 8244. [2021-06-12 20:42:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8244 states, 8243 states have (on average 4.447409923571516) internal successors, (36660), 8243 states have internal predecessors, (36660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8244 states to 8244 states and 36660 transitions. [2021-06-12 20:42:38,633 INFO L78 Accepts]: Start accepts. Automaton has 8244 states and 36660 transitions. Word has length 33 [2021-06-12 20:42:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:38,633 INFO L482 AbstractCegarLoop]: Abstraction has 8244 states and 36660 transitions. [2021-06-12 20:42:38,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 8244 states and 36660 transitions. [2021-06-12 20:42:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:38,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:38,646 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:38,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:38,847 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash -367156022, now seen corresponding path program 131 times [2021-06-12 20:42:38,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:38,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891973592] [2021-06-12 20:42:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:38,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891973592] [2021-06-12 20:42:38,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891973592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33216135] [2021-06-12 20:42:38,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:39,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:42:39,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:39,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:39,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:39,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:42:39,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:39,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:39,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:39,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:42:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:39,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33216135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:39,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:39,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:39,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600823496] [2021-06-12 20:42:39,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:39,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:39,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:39,224 INFO L87 Difference]: Start difference. First operand 8244 states and 36660 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:40,207 INFO L93 Difference]: Finished difference Result 9270 states and 40533 transitions. [2021-06-12 20:42:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:42:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:40,229 INFO L225 Difference]: With dead ends: 9270 [2021-06-12 20:42:40,229 INFO L226 Difference]: Without dead ends: 9221 [2021-06-12 20:42:40,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:42:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9221 states. [2021-06-12 20:42:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9221 to 8148. [2021-06-12 20:42:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8148 states, 8147 states have (on average 4.448140419786425) internal successors, (36239), 8147 states have internal predecessors, (36239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8148 states to 8148 states and 36239 transitions. [2021-06-12 20:42:40,422 INFO L78 Accepts]: Start accepts. Automaton has 8148 states and 36239 transitions. Word has length 33 [2021-06-12 20:42:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:40,422 INFO L482 AbstractCegarLoop]: Abstraction has 8148 states and 36239 transitions. [2021-06-12 20:42:40,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8148 states and 36239 transitions. [2021-06-12 20:42:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:40,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:40,436 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:40,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-12 20:42:40,636 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1856844270, now seen corresponding path program 132 times [2021-06-12 20:42:40,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:40,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460230487] [2021-06-12 20:42:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:40,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460230487] [2021-06-12 20:42:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460230487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756283860] [2021-06-12 20:42:40,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:40,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:42:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:40,970 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:42:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:42:40,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:40,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:40,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:40,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-12 20:42:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:41,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756283860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:41,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:41,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 20:42:41,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187820939] [2021-06-12 20:42:41,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:42:41,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:42:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:42:41,197 INFO L87 Difference]: Start difference. First operand 8148 states and 36239 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:42,604 INFO L93 Difference]: Finished difference Result 9264 states and 40489 transitions. [2021-06-12 20:42:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:42,626 INFO L225 Difference]: With dead ends: 9264 [2021-06-12 20:42:42,626 INFO L226 Difference]: Without dead ends: 9255 [2021-06-12 20:42:42,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1131.1ms TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:42:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-06-12 20:42:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8249. [2021-06-12 20:42:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8249 states, 8248 states have (on average 4.448351115421921) internal successors, (36690), 8248 states have internal predecessors, (36690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8249 states to 8249 states and 36690 transitions. [2021-06-12 20:42:42,822 INFO L78 Accepts]: Start accepts. Automaton has 8249 states and 36690 transitions. Word has length 33 [2021-06-12 20:42:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:42,822 INFO L482 AbstractCegarLoop]: Abstraction has 8249 states and 36690 transitions. [2021-06-12 20:42:42,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8249 states and 36690 transitions. [2021-06-12 20:42:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:42,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:42,836 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:43,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-12 20:42:43,037 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:43,037 INFO L82 PathProgramCache]: Analyzing trace with hash 188450828, now seen corresponding path program 133 times [2021-06-12 20:42:43,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:43,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557427498] [2021-06-12 20:42:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:43,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:43,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557427498] [2021-06-12 20:42:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557427498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:43,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591565905] [2021-06-12 20:42:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:43,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:43,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:43,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:43,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:43,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:43,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:42:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:43,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591565905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:43,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:43,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:43,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431796014] [2021-06-12 20:42:43,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:43,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:43,427 INFO L87 Difference]: Start difference. First operand 8249 states and 36690 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:44,455 INFO L93 Difference]: Finished difference Result 9648 states and 41960 transitions. [2021-06-12 20:42:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:42:44,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:44,477 INFO L225 Difference]: With dead ends: 9648 [2021-06-12 20:42:44,477 INFO L226 Difference]: Without dead ends: 9605 [2021-06-12 20:42:44,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 868.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:42:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-06-12 20:42:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8364. [2021-06-12 20:42:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8364 states, 8363 states have (on average 4.450197297620472) internal successors, (37217), 8363 states have internal predecessors, (37217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8364 states to 8364 states and 37217 transitions. [2021-06-12 20:42:44,631 INFO L78 Accepts]: Start accepts. Automaton has 8364 states and 37217 transitions. Word has length 33 [2021-06-12 20:42:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:44,631 INFO L482 AbstractCegarLoop]: Abstraction has 8364 states and 37217 transitions. [2021-06-12 20:42:44,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8364 states and 37217 transitions. [2021-06-12 20:42:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:44,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:44,645 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:44,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-12 20:42:44,845 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:44,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1933373654, now seen corresponding path program 134 times [2021-06-12 20:42:44,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:44,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207838227] [2021-06-12 20:42:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:45,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:45,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207838227] [2021-06-12 20:42:45,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207838227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:45,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008782058] [2021-06-12 20:42:45,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:45,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:45,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:42:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:42:45,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:45,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:42:45,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:45,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:45,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:45,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-12 20:42:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:45,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008782058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:45,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:45,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:42:45,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376272186] [2021-06-12 20:42:45,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:42:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:45,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:42:45,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:42:45,454 INFO L87 Difference]: Start difference. First operand 8364 states and 37217 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:46,489 INFO L93 Difference]: Finished difference Result 8921 states and 39444 transitions. [2021-06-12 20:42:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:42:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:46,509 INFO L225 Difference]: With dead ends: 8921 [2021-06-12 20:42:46,510 INFO L226 Difference]: Without dead ends: 8908 [2021-06-12 20:42:46,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:42:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8908 states. [2021-06-12 20:42:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8908 to 8342. [2021-06-12 20:42:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8342 states, 8341 states have (on average 4.452703512768253) internal successors, (37140), 8341 states have internal predecessors, (37140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 37140 transitions. [2021-06-12 20:42:46,648 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 37140 transitions. Word has length 33 [2021-06-12 20:42:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:46,648 INFO L482 AbstractCegarLoop]: Abstraction has 8342 states and 37140 transitions. [2021-06-12 20:42:46,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 37140 transitions. [2021-06-12 20:42:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:46,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:46,662 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:46,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-12 20:42:46,862 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1989389074, now seen corresponding path program 135 times [2021-06-12 20:42:46,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:46,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835379479] [2021-06-12 20:42:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:47,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:47,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835379479] [2021-06-12 20:42:47,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835379479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:47,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044633191] [2021-06-12 20:42:47,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:47,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:42:47,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:47,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:47,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:47,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:42:47,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:47,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:47,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:47,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:42:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:47,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044633191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:47,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:47,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:42:47,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619225768] [2021-06-12 20:42:47,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:42:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:42:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:42:47,414 INFO L87 Difference]: Start difference. First operand 8342 states and 37140 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:49,791 INFO L93 Difference]: Finished difference Result 9584 states and 41393 transitions. [2021-06-12 20:42:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:42:49,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:49,813 INFO L225 Difference]: With dead ends: 9584 [2021-06-12 20:42:49,814 INFO L226 Difference]: Without dead ends: 9553 [2021-06-12 20:42:49,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 2073.1ms TimeCoverageRelationStatistics Valid=512, Invalid=2458, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:42:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9553 states. [2021-06-12 20:42:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9553 to 8381. [2021-06-12 20:42:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8381 states, 8380 states have (on average 4.453937947494033) internal successors, (37324), 8380 states have internal predecessors, (37324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8381 states to 8381 states and 37324 transitions. [2021-06-12 20:42:49,994 INFO L78 Accepts]: Start accepts. Automaton has 8381 states and 37324 transitions. Word has length 33 [2021-06-12 20:42:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:49,994 INFO L482 AbstractCegarLoop]: Abstraction has 8381 states and 37324 transitions. [2021-06-12 20:42:49,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8381 states and 37324 transitions. [2021-06-12 20:42:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:50,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:50,009 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:50,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-12 20:42:50,209 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1791432998, now seen corresponding path program 136 times [2021-06-12 20:42:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:50,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334709387] [2021-06-12 20:42:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:50,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:50,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334709387] [2021-06-12 20:42:50,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334709387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:50,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779071875] [2021-06-12 20:42:50,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:50,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:50,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:50,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:42:50,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:50,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:50,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:50,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:42:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:50,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779071875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:50,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:50,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:50,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726362129] [2021-06-12 20:42:50,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:50,772 INFO L87 Difference]: Start difference. First operand 8381 states and 37324 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:52,596 INFO L93 Difference]: Finished difference Result 9674 states and 42165 transitions. [2021-06-12 20:42:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:52,618 INFO L225 Difference]: With dead ends: 9674 [2021-06-12 20:42:52,618 INFO L226 Difference]: Without dead ends: 9648 [2021-06-12 20:42:52,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1635.1ms TimeCoverageRelationStatistics Valid=546, Invalid=2316, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:42:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9648 states. [2021-06-12 20:42:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9648 to 8434. [2021-06-12 20:42:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8434 states, 8433 states have (on average 4.451440768409818) internal successors, (37539), 8433 states have internal predecessors, (37539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8434 states to 8434 states and 37539 transitions. [2021-06-12 20:42:52,812 INFO L78 Accepts]: Start accepts. Automaton has 8434 states and 37539 transitions. Word has length 33 [2021-06-12 20:42:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:52,812 INFO L482 AbstractCegarLoop]: Abstraction has 8434 states and 37539 transitions. [2021-06-12 20:42:52,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 8434 states and 37539 transitions. [2021-06-12 20:42:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:52,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:52,827 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:53,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:53,027 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1481631034, now seen corresponding path program 137 times [2021-06-12 20:42:53,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:53,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472679726] [2021-06-12 20:42:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:53,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472679726] [2021-06-12 20:42:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472679726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563147628] [2021-06-12 20:42:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:53,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:42:53,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:53,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:53,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:53,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:53,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:53,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:42:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:53,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563147628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:53,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:53,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:42:53,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164828755] [2021-06-12 20:42:53,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:53,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:53,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:53,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:53,412 INFO L87 Difference]: Start difference. First operand 8434 states and 37539 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:54,604 INFO L93 Difference]: Finished difference Result 9408 states and 41336 transitions. [2021-06-12 20:42:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:42:54,604 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:54,626 INFO L225 Difference]: With dead ends: 9408 [2021-06-12 20:42:54,626 INFO L226 Difference]: Without dead ends: 9297 [2021-06-12 20:42:54,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1065.4ms TimeCoverageRelationStatistics Valid=450, Invalid=2000, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:42:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9297 states. [2021-06-12 20:42:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9297 to 8394. [2021-06-12 20:42:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8394 states, 8393 states have (on average 4.451924222566425) internal successors, (37365), 8393 states have internal predecessors, (37365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8394 states to 8394 states and 37365 transitions. [2021-06-12 20:42:54,768 INFO L78 Accepts]: Start accepts. Automaton has 8394 states and 37365 transitions. Word has length 33 [2021-06-12 20:42:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:54,768 INFO L482 AbstractCegarLoop]: Abstraction has 8394 states and 37365 transitions. [2021-06-12 20:42:54,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8394 states and 37365 transitions. [2021-06-12 20:42:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:54,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:54,782 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:54,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-12 20:42:54,983 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:54,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:54,983 INFO L82 PathProgramCache]: Analyzing trace with hash -500910676, now seen corresponding path program 138 times [2021-06-12 20:42:54,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:54,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958805410] [2021-06-12 20:42:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:55,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958805410] [2021-06-12 20:42:55,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958805410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345202512] [2021-06-12 20:42:55,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:55,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:42:55,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:55,541 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:42:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:42:55,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:55,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:55,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:55,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:42:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:55,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345202512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:55,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:55,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:42:55,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994353702] [2021-06-12 20:42:55,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:42:55,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:42:55,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:42:55,710 INFO L87 Difference]: Start difference. First operand 8394 states and 37365 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:57,538 INFO L93 Difference]: Finished difference Result 9276 states and 40664 transitions. [2021-06-12 20:42:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:42:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:42:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:57,559 INFO L225 Difference]: With dead ends: 9276 [2021-06-12 20:42:57,559 INFO L226 Difference]: Without dead ends: 9230 [2021-06-12 20:42:57,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1802.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:42:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-06-12 20:42:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 8500. [2021-06-12 20:42:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8500 states, 8499 states have (on average 4.455583009765855) internal successors, (37868), 8499 states have internal predecessors, (37868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8500 states to 8500 states and 37868 transitions. [2021-06-12 20:42:57,763 INFO L78 Accepts]: Start accepts. Automaton has 8500 states and 37868 transitions. Word has length 33 [2021-06-12 20:42:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:57,763 INFO L482 AbstractCegarLoop]: Abstraction has 8500 states and 37868 transitions. [2021-06-12 20:42:57,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 8500 states and 37868 transitions. [2021-06-12 20:42:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:42:57,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:57,777 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:57,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:57,978 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:57,978 INFO L82 PathProgramCache]: Analyzing trace with hash -689752242, now seen corresponding path program 139 times [2021-06-12 20:42:57,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:57,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329679757] [2021-06-12 20:42:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:58,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329679757] [2021-06-12 20:42:58,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329679757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276137168] [2021-06-12 20:42:58,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:58,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:42:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:58,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:42:58,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:58,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:58,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:58,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:42:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:58,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276137168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:58,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:58,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:58,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072059457] [2021-06-12 20:42:58,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:58,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:58,504 INFO L87 Difference]: Start difference. First operand 8500 states and 37868 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:00,361 INFO L93 Difference]: Finished difference Result 9775 states and 42697 transitions. [2021-06-12 20:43:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:43:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:00,383 INFO L225 Difference]: With dead ends: 9775 [2021-06-12 20:43:00,383 INFO L226 Difference]: Without dead ends: 9757 [2021-06-12 20:43:00,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1618.1ms TimeCoverageRelationStatistics Valid=535, Invalid=2327, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:43:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-12 20:43:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 8467. [2021-06-12 20:43:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8467 states, 8466 states have (on average 4.450626033545949) internal successors, (37679), 8466 states have internal predecessors, (37679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8467 states to 8467 states and 37679 transitions. [2021-06-12 20:43:00,583 INFO L78 Accepts]: Start accepts. Automaton has 8467 states and 37679 transitions. Word has length 33 [2021-06-12 20:43:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:00,583 INFO L482 AbstractCegarLoop]: Abstraction has 8467 states and 37679 transitions. [2021-06-12 20:43:00,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8467 states and 37679 transitions. [2021-06-12 20:43:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:00,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:00,597 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:00,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-12 20:43:00,798 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1936821612, now seen corresponding path program 140 times [2021-06-12 20:43:00,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:00,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908019365] [2021-06-12 20:43:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:01,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:01,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908019365] [2021-06-12 20:43:01,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908019365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:01,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108276094] [2021-06-12 20:43:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:01,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:01,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:43:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:01,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:01,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:43:01,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:01,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:01,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:01,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-12 20:43:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:01,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108276094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:01,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:01,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:43:01,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052368945] [2021-06-12 20:43:01,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:01,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:01,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:01,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:01,358 INFO L87 Difference]: Start difference. First operand 8467 states and 37679 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:02,090 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-12 20:43:02,337 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-12 20:43:02,809 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-12 20:43:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:04,493 INFO L93 Difference]: Finished difference Result 10035 states and 43178 transitions. [2021-06-12 20:43:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:43:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:04,516 INFO L225 Difference]: With dead ends: 10035 [2021-06-12 20:43:04,517 INFO L226 Difference]: Without dead ends: 9956 [2021-06-12 20:43:04,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2684.2ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:43:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9956 states. [2021-06-12 20:43:04,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9956 to 8418. [2021-06-12 20:43:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 4.450754425567304) internal successors, (37462), 8417 states have internal predecessors, (37462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 37462 transitions. [2021-06-12 20:43:04,668 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 37462 transitions. Word has length 33 [2021-06-12 20:43:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:04,668 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 37462 transitions. [2021-06-12 20:43:04,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 37462 transitions. [2021-06-12 20:43:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:04,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:04,682 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:04,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:04,883 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1094523372, now seen corresponding path program 141 times [2021-06-12 20:43:04,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:04,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837368966] [2021-06-12 20:43:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:05,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:05,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837368966] [2021-06-12 20:43:05,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837368966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:05,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146690906] [2021-06-12 20:43:05,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:05,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:43:05,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:05,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:05,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:05,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:43:05,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:05,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:05,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:05,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:43:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:05,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146690906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:05,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:05,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:43:05,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957736420] [2021-06-12 20:43:05,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:43:05,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:05,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:43:05,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:43:05,422 INFO L87 Difference]: Start difference. First operand 8418 states and 37462 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:07,049 INFO L93 Difference]: Finished difference Result 9273 states and 40969 transitions. [2021-06-12 20:43:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:43:07,050 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:07,071 INFO L225 Difference]: With dead ends: 9273 [2021-06-12 20:43:07,071 INFO L226 Difference]: Without dead ends: 9233 [2021-06-12 20:43:07,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1368.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:43:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9233 states. [2021-06-12 20:43:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9233 to 8418. [2021-06-12 20:43:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 4.450398004039444) internal successors, (37459), 8417 states have internal predecessors, (37459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 37459 transitions. [2021-06-12 20:43:07,217 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 37459 transitions. Word has length 33 [2021-06-12 20:43:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:07,217 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 37459 transitions. [2021-06-12 20:43:07,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 37459 transitions. [2021-06-12 20:43:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:07,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:07,231 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:07,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-12 20:43:07,432 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:07,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1001867172, now seen corresponding path program 142 times [2021-06-12 20:43:07,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:07,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148697555] [2021-06-12 20:43:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148697555] [2021-06-12 20:43:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148697555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880957488] [2021-06-12 20:43:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:07,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:07,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:07,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:07,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:07,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:07,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:43:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:07,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880957488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:07,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:07,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:43:07,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231540542] [2021-06-12 20:43:07,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:07,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:07,895 INFO L87 Difference]: Start difference. First operand 8418 states and 37459 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:09,355 INFO L93 Difference]: Finished difference Result 9503 states and 41774 transitions. [2021-06-12 20:43:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:43:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:09,376 INFO L225 Difference]: With dead ends: 9503 [2021-06-12 20:43:09,377 INFO L226 Difference]: Without dead ends: 9421 [2021-06-12 20:43:09,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=399, Invalid=2151, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:43:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9421 states. [2021-06-12 20:43:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9421 to 8454. [2021-06-12 20:43:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8454 states, 8453 states have (on average 4.454158286998699) internal successors, (37651), 8453 states have internal predecessors, (37651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8454 states to 8454 states and 37651 transitions. [2021-06-12 20:43:09,526 INFO L78 Accepts]: Start accepts. Automaton has 8454 states and 37651 transitions. Word has length 33 [2021-06-12 20:43:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:09,527 INFO L482 AbstractCegarLoop]: Abstraction has 8454 states and 37651 transitions. [2021-06-12 20:43:09,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8454 states and 37651 transitions. [2021-06-12 20:43:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:09,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:09,541 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:09,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-12 20:43:09,742 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1392200684, now seen corresponding path program 143 times [2021-06-12 20:43:09,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:09,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926290896] [2021-06-12 20:43:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:09,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:09,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926290896] [2021-06-12 20:43:09,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926290896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:09,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609112336] [2021-06-12 20:43:09,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:10,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:43:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:10,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:10,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:10,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:10,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:10,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:43:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:10,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609112336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:10,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:10,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:43:10,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720561267] [2021-06-12 20:43:10,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:10,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:10,209 INFO L87 Difference]: Start difference. First operand 8454 states and 37651 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:13,367 INFO L93 Difference]: Finished difference Result 10544 states and 45844 transitions. [2021-06-12 20:43:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:43:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:13,391 INFO L225 Difference]: With dead ends: 10544 [2021-06-12 20:43:13,391 INFO L226 Difference]: Without dead ends: 10498 [2021-06-12 20:43:13,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 2601.3ms TimeCoverageRelationStatistics Valid=737, Invalid=4093, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:43:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10498 states. [2021-06-12 20:43:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10498 to 8651. [2021-06-12 20:43:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8651 states, 8650 states have (on average 4.455491329479769) internal successors, (38540), 8650 states have internal predecessors, (38540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 38540 transitions. [2021-06-12 20:43:13,633 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 38540 transitions. Word has length 33 [2021-06-12 20:43:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:13,633 INFO L482 AbstractCegarLoop]: Abstraction has 8651 states and 38540 transitions. [2021-06-12 20:43:13,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 38540 transitions. [2021-06-12 20:43:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:13,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:13,648 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:13,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:13,848 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1045531604, now seen corresponding path program 144 times [2021-06-12 20:43:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:13,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894576818] [2021-06-12 20:43:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:14,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:14,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894576818] [2021-06-12 20:43:14,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894576818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:14,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972865907] [2021-06-12 20:43:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:14,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:43:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:14,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:14,295 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:43:14,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:43:14,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:43:14,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:14,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:14,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:43:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:14,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972865907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:14,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:14,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:43:14,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482023417] [2021-06-12 20:43:14,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:43:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:43:14,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:43:14,411 INFO L87 Difference]: Start difference. First operand 8651 states and 38540 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:16,972 INFO L93 Difference]: Finished difference Result 10637 states and 45085 transitions. [2021-06-12 20:43:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:43:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:16,995 INFO L225 Difference]: With dead ends: 10637 [2021-06-12 20:43:16,995 INFO L226 Difference]: Without dead ends: 10609 [2021-06-12 20:43:16,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2228.2ms TimeCoverageRelationStatistics Valid=527, Invalid=3133, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:43:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2021-06-12 20:43:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 8693. [2021-06-12 20:43:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8693 states, 8692 states have (on average 4.456626783248964) internal successors, (38737), 8692 states have internal predecessors, (38737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 38737 transitions. [2021-06-12 20:43:17,160 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 38737 transitions. Word has length 33 [2021-06-12 20:43:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:17,160 INFO L482 AbstractCegarLoop]: Abstraction has 8693 states and 38737 transitions. [2021-06-12 20:43:17,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 38737 transitions. [2021-06-12 20:43:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:17,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:17,223 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:17,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-12 20:43:17,424 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash -212643602, now seen corresponding path program 145 times [2021-06-12 20:43:17,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:17,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371324685] [2021-06-12 20:43:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:17,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:17,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371324685] [2021-06-12 20:43:17,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371324685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:17,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141289146] [2021-06-12 20:43:17,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:17,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:17,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:43:17,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:17,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:17,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:17,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:43:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:17,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141289146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:17,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:17,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:17,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360440167] [2021-06-12 20:43:17,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:17,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:17,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:17,805 INFO L87 Difference]: Start difference. First operand 8693 states and 38737 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:18,971 INFO L93 Difference]: Finished difference Result 10026 states and 43644 transitions. [2021-06-12 20:43:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:43:18,971 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:18,994 INFO L225 Difference]: With dead ends: 10026 [2021-06-12 20:43:18,994 INFO L226 Difference]: Without dead ends: 9944 [2021-06-12 20:43:18,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:43:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9944 states. [2021-06-12 20:43:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9944 to 8602. [2021-06-12 20:43:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8602 states, 8601 states have (on average 4.45738867573538) internal successors, (38338), 8601 states have internal predecessors, (38338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 38338 transitions. [2021-06-12 20:43:19,155 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 38338 transitions. Word has length 33 [2021-06-12 20:43:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:19,155 INFO L482 AbstractCegarLoop]: Abstraction has 8602 states and 38338 transitions. [2021-06-12 20:43:19,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 38338 transitions. [2021-06-12 20:43:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:19,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:19,170 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:19,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-12 20:43:19,370 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash 203233364, now seen corresponding path program 146 times [2021-06-12 20:43:19,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:19,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880073549] [2021-06-12 20:43:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:19,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:19,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880073549] [2021-06-12 20:43:19,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880073549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:19,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922827163] [2021-06-12 20:43:19,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:19,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:19,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:19,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:19,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:19,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-12 20:43:19,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:19,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:19,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:19,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-12 20:43:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:19,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922827163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:19,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:19,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:43:19,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072064745] [2021-06-12 20:43:19,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:43:19,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:19,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:43:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:43:19,948 INFO L87 Difference]: Start difference. First operand 8602 states and 38338 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:21,654 INFO L93 Difference]: Finished difference Result 9708 states and 42784 transitions. [2021-06-12 20:43:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:43:21,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:21,677 INFO L225 Difference]: With dead ends: 9708 [2021-06-12 20:43:21,677 INFO L226 Difference]: Without dead ends: 9656 [2021-06-12 20:43:21,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1314.6ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:43:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9656 states. [2021-06-12 20:43:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9656 to 8590. [2021-06-12 20:43:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8590 states, 8589 states have (on average 4.457561997904296) internal successors, (38286), 8589 states have internal predecessors, (38286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8590 states to 8590 states and 38286 transitions. [2021-06-12 20:43:21,829 INFO L78 Accepts]: Start accepts. Automaton has 8590 states and 38286 transitions. Word has length 33 [2021-06-12 20:43:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:21,830 INFO L482 AbstractCegarLoop]: Abstraction has 8590 states and 38286 transitions. [2021-06-12 20:43:21,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 8590 states and 38286 transitions. [2021-06-12 20:43:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:21,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:21,844 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:22,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:22,045 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:22,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1467202898, now seen corresponding path program 147 times [2021-06-12 20:43:22,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:22,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728820717] [2021-06-12 20:43:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:22,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:22,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728820717] [2021-06-12 20:43:22,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728820717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:22,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572480783] [2021-06-12 20:43:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:22,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:43:22,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:22,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:22,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:22,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:22,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:43:22,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:22,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:22,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:22,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-12 20:43:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572480783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:22,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:22,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:43:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319296701] [2021-06-12 20:43:22,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:43:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:43:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:43:22,611 INFO L87 Difference]: Start difference. First operand 8590 states and 38286 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:23,746 INFO L93 Difference]: Finished difference Result 9586 states and 42262 transitions. [2021-06-12 20:43:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:43:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:23,768 INFO L225 Difference]: With dead ends: 9586 [2021-06-12 20:43:23,768 INFO L226 Difference]: Without dead ends: 9540 [2021-06-12 20:43:23,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 937.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:43:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9540 states. [2021-06-12 20:43:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 8590. [2021-06-12 20:43:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8590 states, 8589 states have (on average 4.457329141925719) internal successors, (38284), 8589 states have internal predecessors, (38284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8590 states to 8590 states and 38284 transitions. [2021-06-12 20:43:23,913 INFO L78 Accepts]: Start accepts. Automaton has 8590 states and 38284 transitions. Word has length 33 [2021-06-12 20:43:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:23,913 INFO L482 AbstractCegarLoop]: Abstraction has 8590 states and 38284 transitions. [2021-06-12 20:43:23,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8590 states and 38284 transitions. [2021-06-12 20:43:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:23,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:23,927 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:24,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-12 20:43:24,128 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1933910820, now seen corresponding path program 148 times [2021-06-12 20:43:24,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:24,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299451961] [2021-06-12 20:43:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:24,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:24,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299451961] [2021-06-12 20:43:24,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299451961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:24,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121321721] [2021-06-12 20:43:24,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:24,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:24,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:24,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:24,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:24,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:43:24,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:24,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:24,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:24,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:43:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:24,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121321721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:24,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:24,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:43:24,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276686616] [2021-06-12 20:43:24,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:24,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:24,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:24,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:24,561 INFO L87 Difference]: Start difference. First operand 8590 states and 38284 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:25,947 INFO L93 Difference]: Finished difference Result 9769 states and 42998 transitions. [2021-06-12 20:43:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:43:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:25,970 INFO L225 Difference]: With dead ends: 9769 [2021-06-12 20:43:25,970 INFO L226 Difference]: Without dead ends: 9678 [2021-06-12 20:43:25,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1165.5ms TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:43:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9678 states. [2021-06-12 20:43:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9678 to 8599. [2021-06-12 20:43:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8599 states, 8598 states have (on average 4.45975808327518) internal successors, (38345), 8598 states have internal predecessors, (38345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8599 states to 8599 states and 38345 transitions. [2021-06-12 20:43:26,122 INFO L78 Accepts]: Start accepts. Automaton has 8599 states and 38345 transitions. Word has length 33 [2021-06-12 20:43:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:26,122 INFO L482 AbstractCegarLoop]: Abstraction has 8599 states and 38345 transitions. [2021-06-12 20:43:26,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8599 states and 38345 transitions. [2021-06-12 20:43:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:26,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:26,137 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:26,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:26,337 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1647132526, now seen corresponding path program 149 times [2021-06-12 20:43:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:26,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718570212] [2021-06-12 20:43:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:26,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718570212] [2021-06-12 20:43:26,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718570212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:26,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483098361] [2021-06-12 20:43:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:26,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:43:26,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:26,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:43:26,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:26,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:26,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:26,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-12 20:43:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:26,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483098361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:26,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:26,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:43:26,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264037246] [2021-06-12 20:43:26,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:26,769 INFO L87 Difference]: Start difference. First operand 8599 states and 38345 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:28,013 INFO L93 Difference]: Finished difference Result 9440 states and 41807 transitions. [2021-06-12 20:43:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:43:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:28,035 INFO L225 Difference]: With dead ends: 9440 [2021-06-12 20:43:28,035 INFO L226 Difference]: Without dead ends: 9425 [2021-06-12 20:43:28,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:43:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9425 states. [2021-06-12 20:43:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9425 to 8623. [2021-06-12 20:43:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8623 states, 8622 states have (on average 4.461029923451635) internal successors, (38463), 8622 states have internal predecessors, (38463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8623 states to 8623 states and 38463 transitions. [2021-06-12 20:43:28,182 INFO L78 Accepts]: Start accepts. Automaton has 8623 states and 38463 transitions. Word has length 33 [2021-06-12 20:43:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:28,182 INFO L482 AbstractCegarLoop]: Abstraction has 8623 states and 38463 transitions. [2021-06-12 20:43:28,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8623 states and 38463 transitions. [2021-06-12 20:43:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:28,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:28,196 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:28,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-12 20:43:28,396 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1213103180, now seen corresponding path program 150 times [2021-06-12 20:43:28,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:28,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727962406] [2021-06-12 20:43:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:28,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:28,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727962406] [2021-06-12 20:43:28,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727962406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:28,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368350964] [2021-06-12 20:43:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:28,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:43:28,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:43:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:28,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:28,845 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:43:28,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:43:28,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:43:28,877 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-12 20:43:28,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:28,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:43:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:28,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368350964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:28,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:28,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:43:28,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243176599] [2021-06-12 20:43:28,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:43:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:43:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:43:28,995 INFO L87 Difference]: Start difference. First operand 8623 states and 38463 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:30,528 INFO L93 Difference]: Finished difference Result 9476 states and 41882 transitions. [2021-06-12 20:43:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:43:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:30,550 INFO L225 Difference]: With dead ends: 9476 [2021-06-12 20:43:30,550 INFO L226 Difference]: Without dead ends: 9447 [2021-06-12 20:43:30,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1105.8ms TimeCoverageRelationStatistics Valid=217, Invalid=2233, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:43:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2021-06-12 20:43:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 8647. [2021-06-12 20:43:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8647 states, 8646 states have (on average 4.462294702752718) internal successors, (38581), 8646 states have internal predecessors, (38581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8647 states to 8647 states and 38581 transitions. [2021-06-12 20:43:30,697 INFO L78 Accepts]: Start accepts. Automaton has 8647 states and 38581 transitions. Word has length 33 [2021-06-12 20:43:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:30,697 INFO L482 AbstractCegarLoop]: Abstraction has 8647 states and 38581 transitions. [2021-06-12 20:43:30,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8647 states and 38581 transitions. [2021-06-12 20:43:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:30,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:30,711 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:30,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:30,913 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1566242670, now seen corresponding path program 151 times [2021-06-12 20:43:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:30,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320098344] [2021-06-12 20:43:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:31,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:31,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320098344] [2021-06-12 20:43:31,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320098344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:31,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307954839] [2021-06-12 20:43:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:31,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:31,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:31,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:31,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:31,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:31,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:43:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307954839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:31,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:31,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:43:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387622506] [2021-06-12 20:43:31,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:31,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:31,332 INFO L87 Difference]: Start difference. First operand 8647 states and 38581 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:32,736 INFO L93 Difference]: Finished difference Result 10432 states and 45531 transitions. [2021-06-12 20:43:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:43:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:32,760 INFO L225 Difference]: With dead ends: 10432 [2021-06-12 20:43:32,760 INFO L226 Difference]: Without dead ends: 10402 [2021-06-12 20:43:32,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 980.4ms TimeCoverageRelationStatistics Valid=292, Invalid=2158, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:43:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2021-06-12 20:43:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 8760. [2021-06-12 20:43:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8760 states, 8759 states have (on average 4.464322411234159) internal successors, (39103), 8759 states have internal predecessors, (39103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8760 states to 8760 states and 39103 transitions. [2021-06-12 20:43:32,926 INFO L78 Accepts]: Start accepts. Automaton has 8760 states and 39103 transitions. Word has length 33 [2021-06-12 20:43:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:32,926 INFO L482 AbstractCegarLoop]: Abstraction has 8760 states and 39103 transitions. [2021-06-12 20:43:32,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 8760 states and 39103 transitions. [2021-06-12 20:43:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:32,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:32,940 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:33,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-12 20:43:33,140 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash 871489618, now seen corresponding path program 152 times [2021-06-12 20:43:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:33,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490693666] [2021-06-12 20:43:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:33,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490693666] [2021-06-12 20:43:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490693666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002251292] [2021-06-12 20:43:33,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:33,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:33,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:33,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:43:33,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:33,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:33,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:33,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:43:33,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:33,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:33,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:33,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-12 20:43:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:33,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002251292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:33,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:33,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:43:33,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485848840] [2021-06-12 20:43:33,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:33,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:33,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:33,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:33,646 INFO L87 Difference]: Start difference. First operand 8760 states and 39103 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:34,387 INFO L93 Difference]: Finished difference Result 9572 states and 42374 transitions. [2021-06-12 20:43:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:43:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:34,408 INFO L225 Difference]: With dead ends: 9572 [2021-06-12 20:43:34,408 INFO L226 Difference]: Without dead ends: 9558 [2021-06-12 20:43:34,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 703.8ms TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:43:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9558 states. [2021-06-12 20:43:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9558 to 8754. [2021-06-12 20:43:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8754 states, 8753 states have (on average 4.464983434251114) internal successors, (39082), 8753 states have internal predecessors, (39082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8754 states to 8754 states and 39082 transitions. [2021-06-12 20:43:34,639 INFO L78 Accepts]: Start accepts. Automaton has 8754 states and 39082 transitions. Word has length 33 [2021-06-12 20:43:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:34,639 INFO L482 AbstractCegarLoop]: Abstraction has 8754 states and 39082 transitions. [2021-06-12 20:43:34,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 8754 states and 39082 transitions. [2021-06-12 20:43:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:34,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:34,654 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:34,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-12 20:43:34,855 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 59830528, now seen corresponding path program 153 times [2021-06-12 20:43:34,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:34,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145522100] [2021-06-12 20:43:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:35,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:35,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145522100] [2021-06-12 20:43:35,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145522100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:35,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011563549] [2021-06-12 20:43:35,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:35,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:43:35,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:43:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:35,248 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:43:35,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:43:35,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:43:35,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:35,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:35,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:43:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:35,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011563549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:35,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:35,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:43:35,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829144657] [2021-06-12 20:43:35,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:43:35,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:43:35,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:43:35,392 INFO L87 Difference]: Start difference. First operand 8754 states and 39082 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:37,015 INFO L93 Difference]: Finished difference Result 9704 states and 42872 transitions. [2021-06-12 20:43:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:43:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:37,038 INFO L225 Difference]: With dead ends: 9704 [2021-06-12 20:43:37,038 INFO L226 Difference]: Without dead ends: 9675 [2021-06-12 20:43:37,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1192.9ms TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:43:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9675 states. [2021-06-12 20:43:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9675 to 8757. [2021-06-12 20:43:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8756 states have (on average 4.464595705801736) internal successors, (39092), 8756 states have internal predecessors, (39092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 39092 transitions. [2021-06-12 20:43:37,258 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 39092 transitions. Word has length 33 [2021-06-12 20:43:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:37,258 INFO L482 AbstractCegarLoop]: Abstraction has 8757 states and 39092 transitions. [2021-06-12 20:43:37,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 39092 transitions. [2021-06-12 20:43:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:37,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:37,273 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:37,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:37,474 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:37,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2144423326, now seen corresponding path program 154 times [2021-06-12 20:43:37,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:37,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904849452] [2021-06-12 20:43:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:37,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:37,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904849452] [2021-06-12 20:43:37,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904849452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:37,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003994754] [2021-06-12 20:43:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:37,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:37,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:37,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:37,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:37,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:43:37,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:37,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:37,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:37,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:43:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:37,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003994754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:37,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:37,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:37,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142377102] [2021-06-12 20:43:37,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:37,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:37,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:37,911 INFO L87 Difference]: Start difference. First operand 8757 states and 39092 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:39,271 INFO L93 Difference]: Finished difference Result 10287 states and 45006 transitions. [2021-06-12 20:43:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:43:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:39,296 INFO L225 Difference]: With dead ends: 10287 [2021-06-12 20:43:39,296 INFO L226 Difference]: Without dead ends: 10242 [2021-06-12 20:43:39,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 966.4ms TimeCoverageRelationStatistics Valid=292, Invalid=1964, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:43:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2021-06-12 20:43:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8711. [2021-06-12 20:43:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8711 states, 8710 states have (on average 4.468082663605052) internal successors, (38917), 8710 states have internal predecessors, (38917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8711 states to 8711 states and 38917 transitions. [2021-06-12 20:43:39,463 INFO L78 Accepts]: Start accepts. Automaton has 8711 states and 38917 transitions. Word has length 33 [2021-06-12 20:43:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:39,463 INFO L482 AbstractCegarLoop]: Abstraction has 8711 states and 38917 transitions. [2021-06-12 20:43:39,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 8711 states and 38917 transitions. [2021-06-12 20:43:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:39,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:39,477 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:39,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:39,686 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1406368906, now seen corresponding path program 155 times [2021-06-12 20:43:39,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:39,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712500197] [2021-06-12 20:43:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:39,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:39,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712500197] [2021-06-12 20:43:39,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712500197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:39,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052020256] [2021-06-12 20:43:39,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:39,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:43:39,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:40,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:40,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:43:40,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:40,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:40,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:40,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:43:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:40,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052020256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:40,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:40,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:43:40,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009765947] [2021-06-12 20:43:40,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:40,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:40,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:40,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:40,122 INFO L87 Difference]: Start difference. First operand 8711 states and 38917 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:41,554 INFO L93 Difference]: Finished difference Result 9964 states and 43880 transitions. [2021-06-12 20:43:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:43:41,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:41,577 INFO L225 Difference]: With dead ends: 9964 [2021-06-12 20:43:41,577 INFO L226 Difference]: Without dead ends: 9919 [2021-06-12 20:43:41,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1133.6ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:43:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2021-06-12 20:43:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 8784. [2021-06-12 20:43:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 8783 states have (on average 4.468860298303541) internal successors, (39250), 8783 states have internal predecessors, (39250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 39250 transitions. [2021-06-12 20:43:41,730 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 39250 transitions. Word has length 33 [2021-06-12 20:43:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:41,730 INFO L482 AbstractCegarLoop]: Abstraction has 8784 states and 39250 transitions. [2021-06-12 20:43:41,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 39250 transitions. [2021-06-12 20:43:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:41,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:41,744 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:41,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:41,945 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:41,945 INFO L82 PathProgramCache]: Analyzing trace with hash 678223892, now seen corresponding path program 156 times [2021-06-12 20:43:41,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:41,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073930398] [2021-06-12 20:43:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:42,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073930398] [2021-06-12 20:43:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073930398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510128317] [2021-06-12 20:43:42,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:42,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:43:42,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:42,286 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:43:42,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:43:42,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:42,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:42,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:42,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-12 20:43:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:42,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510128317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:42,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:42,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:43:42,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586829659] [2021-06-12 20:43:42,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:43:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:43:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:43:42,486 INFO L87 Difference]: Start difference. First operand 8784 states and 39250 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:44,083 INFO L93 Difference]: Finished difference Result 9538 states and 42222 transitions. [2021-06-12 20:43:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:43:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:44,105 INFO L225 Difference]: With dead ends: 9538 [2021-06-12 20:43:44,105 INFO L226 Difference]: Without dead ends: 9524 [2021-06-12 20:43:44,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1226.7ms TimeCoverageRelationStatistics Valid=320, Invalid=2130, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:43:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2021-06-12 20:43:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 8802. [2021-06-12 20:43:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8802 states, 8801 states have (on average 4.469605726621975) internal successors, (39337), 8801 states have internal predecessors, (39337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8802 states to 8802 states and 39337 transitions. [2021-06-12 20:43:44,243 INFO L78 Accepts]: Start accepts. Automaton has 8802 states and 39337 transitions. Word has length 33 [2021-06-12 20:43:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:44,243 INFO L482 AbstractCegarLoop]: Abstraction has 8802 states and 39337 transitions. [2021-06-12 20:43:44,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8802 states and 39337 transitions. [2021-06-12 20:43:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:44,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:44,257 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:44,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-12 20:43:44,457 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1504314774, now seen corresponding path program 157 times [2021-06-12 20:43:44,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:44,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293834276] [2021-06-12 20:43:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:44,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:44,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293834276] [2021-06-12 20:43:44,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293834276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:44,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118262754] [2021-06-12 20:43:44,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:44,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:44,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:44,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:44,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:44,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:43:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:44,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118262754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:44,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:44,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:44,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471082236] [2021-06-12 20:43:44,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:44,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:44,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:44,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:44,833 INFO L87 Difference]: Start difference. First operand 8802 states and 39337 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:45,997 INFO L93 Difference]: Finished difference Result 10192 states and 44673 transitions. [2021-06-12 20:43:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:43:45,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:46,020 INFO L225 Difference]: With dead ends: 10192 [2021-06-12 20:43:46,021 INFO L226 Difference]: Without dead ends: 10147 [2021-06-12 20:43:46,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 885.7ms TimeCoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:43:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10147 states. [2021-06-12 20:43:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10147 to 8838. [2021-06-12 20:43:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8838 states, 8837 states have (on average 4.4738033269209) internal successors, (39535), 8837 states have internal predecessors, (39535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8838 states to 8838 states and 39535 transitions. [2021-06-12 20:43:46,246 INFO L78 Accepts]: Start accepts. Automaton has 8838 states and 39535 transitions. Word has length 33 [2021-06-12 20:43:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:46,246 INFO L482 AbstractCegarLoop]: Abstraction has 8838 states and 39535 transitions. [2021-06-12 20:43:46,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 8838 states and 39535 transitions. [2021-06-12 20:43:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:46,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:46,261 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:46,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-12 20:43:46,465 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1295203308, now seen corresponding path program 158 times [2021-06-12 20:43:46,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:46,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361459870] [2021-06-12 20:43:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:46,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361459870] [2021-06-12 20:43:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361459870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183880533] [2021-06-12 20:43:46,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:46,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:46,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:46,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:43:46,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:46,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:46,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:46,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:43:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:46,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183880533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:46,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:46,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:43:46,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261926053] [2021-06-12 20:43:46,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:43:46,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:43:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:43:46,992 INFO L87 Difference]: Start difference. First operand 8838 states and 39535 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:49,011 INFO L93 Difference]: Finished difference Result 9732 states and 43073 transitions. [2021-06-12 20:43:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:43:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:49,034 INFO L225 Difference]: With dead ends: 9732 [2021-06-12 20:43:49,034 INFO L226 Difference]: Without dead ends: 9701 [2021-06-12 20:43:49,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1592.8ms TimeCoverageRelationStatistics Valid=395, Invalid=1861, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:43:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9701 states. [2021-06-12 20:43:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9701 to 8782. [2021-06-12 20:43:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8782 states, 8781 states have (on average 4.47466120031887) internal successors, (39292), 8781 states have internal predecessors, (39292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8782 states to 8782 states and 39292 transitions. [2021-06-12 20:43:49,254 INFO L78 Accepts]: Start accepts. Automaton has 8782 states and 39292 transitions. Word has length 33 [2021-06-12 20:43:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:49,255 INFO L482 AbstractCegarLoop]: Abstraction has 8782 states and 39292 transitions. [2021-06-12 20:43:49,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8782 states and 39292 transitions. [2021-06-12 20:43:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:49,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:49,269 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:49,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-12 20:43:49,470 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash -532830958, now seen corresponding path program 159 times [2021-06-12 20:43:49,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:49,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535764852] [2021-06-12 20:43:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:49,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535764852] [2021-06-12 20:43:49,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535764852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083485247] [2021-06-12 20:43:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:49,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:43:49,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:49,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:49,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:49,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:49,827 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:43:49,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:43:49,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:49,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:49,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:49,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-12 20:43:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:50,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083485247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:50,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:50,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:43:50,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580031447] [2021-06-12 20:43:50,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:43:50,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:43:50,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:43:50,031 INFO L87 Difference]: Start difference. First operand 8782 states and 39292 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:51,774 INFO L93 Difference]: Finished difference Result 9476 states and 42032 transitions. [2021-06-12 20:43:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:43:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:51,797 INFO L225 Difference]: With dead ends: 9476 [2021-06-12 20:43:51,797 INFO L226 Difference]: Without dead ends: 9436 [2021-06-12 20:43:51,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1318.0ms TimeCoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:43:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9436 states. [2021-06-12 20:43:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9436 to 8794. [2021-06-12 20:43:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8794 states, 8793 states have (on average 4.473444785624929) internal successors, (39335), 8793 states have internal predecessors, (39335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8794 states to 8794 states and 39335 transitions. [2021-06-12 20:43:51,954 INFO L78 Accepts]: Start accepts. Automaton has 8794 states and 39335 transitions. Word has length 33 [2021-06-12 20:43:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:51,954 INFO L482 AbstractCegarLoop]: Abstraction has 8794 states and 39335 transitions. [2021-06-12 20:43:51,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 8794 states and 39335 transitions. [2021-06-12 20:43:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:51,969 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:51,969 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:52,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:52,169 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1665745794, now seen corresponding path program 160 times [2021-06-12 20:43:52,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:52,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335092169] [2021-06-12 20:43:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:52,313 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-12 20:43:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:52,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:52,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335092169] [2021-06-12 20:43:52,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335092169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:52,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541330550] [2021-06-12 20:43:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:52,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:52,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:52,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:52,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:52,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:52,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:52,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:52,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:43:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:52,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541330550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:52,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:52,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:43:52,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324481189] [2021-06-12 20:43:52,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:52,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:52,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:52,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:52,715 INFO L87 Difference]: Start difference. First operand 8794 states and 39335 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:54,195 INFO L93 Difference]: Finished difference Result 10032 states and 44108 transitions. [2021-06-12 20:43:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:43:54,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:54,217 INFO L225 Difference]: With dead ends: 10032 [2021-06-12 20:43:54,218 INFO L226 Difference]: Without dead ends: 9994 [2021-06-12 20:43:54,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1251.3ms TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:43:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9994 states. [2021-06-12 20:43:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9994 to 8849. [2021-06-12 20:43:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.476152802893309) internal successors, (39605), 8848 states have internal predecessors, (39605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 39605 transitions. [2021-06-12 20:43:54,384 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 39605 transitions. Word has length 33 [2021-06-12 20:43:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:54,385 INFO L482 AbstractCegarLoop]: Abstraction has 8849 states and 39605 transitions. [2021-06-12 20:43:54,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 39605 transitions. [2021-06-12 20:43:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:54,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:54,400 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:54,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:54,601 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash 796214902, now seen corresponding path program 161 times [2021-06-12 20:43:54,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:54,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650815566] [2021-06-12 20:43:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:54,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650815566] [2021-06-12 20:43:54,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650815566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57431505] [2021-06-12 20:43:54,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:54,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:43:54,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:54,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:54,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:54,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:54,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:54,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:54,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:54,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:43:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:54,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57431505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:54,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:54,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:54,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355653618] [2021-06-12 20:43:54,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:54,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:54,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:54,984 INFO L87 Difference]: Start difference. First operand 8849 states and 39605 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:56,121 INFO L93 Difference]: Finished difference Result 9699 states and 42810 transitions. [2021-06-12 20:43:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:43:56,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:56,144 INFO L225 Difference]: With dead ends: 9699 [2021-06-12 20:43:56,144 INFO L226 Difference]: Without dead ends: 9673 [2021-06-12 20:43:56,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 962.9ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:43:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9673 states. [2021-06-12 20:43:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9673 to 8830. [2021-06-12 20:43:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8830 states, 8829 states have (on average 4.477630535734511) internal successors, (39533), 8829 states have internal predecessors, (39533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8830 states to 8830 states and 39533 transitions. [2021-06-12 20:43:56,302 INFO L78 Accepts]: Start accepts. Automaton has 8830 states and 39533 transitions. Word has length 33 [2021-06-12 20:43:56,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:56,302 INFO L482 AbstractCegarLoop]: Abstraction has 8830 states and 39533 transitions. [2021-06-12 20:43:56,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8830 states and 39533 transitions. [2021-06-12 20:43:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:56,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:56,319 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:56,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:56,521 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash -916173328, now seen corresponding path program 162 times [2021-06-12 20:43:56,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:56,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132087112] [2021-06-12 20:43:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:56,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132087112] [2021-06-12 20:43:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132087112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411170137] [2021-06-12 20:43:56,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:56,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:43:56,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:56,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:56,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:56,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:56,956 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:43:56,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:43:56,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:56,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:56,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:56,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:43:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:57,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411170137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:57,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:57,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:43:57,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577520922] [2021-06-12 20:43:57,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:43:57,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:57,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:43:57,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:43:57,136 INFO L87 Difference]: Start difference. First operand 8830 states and 39533 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:58,482 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 20:43:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:59,009 INFO L93 Difference]: Finished difference Result 10003 states and 43575 transitions. [2021-06-12 20:43:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:43:59,009 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:43:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:59,033 INFO L225 Difference]: With dead ends: 10003 [2021-06-12 20:43:59,033 INFO L226 Difference]: Without dead ends: 9945 [2021-06-12 20:43:59,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1760.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:43:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-06-12 20:43:59,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 8878. [2021-06-12 20:43:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8878 states, 8877 states have (on average 4.482933423453869) internal successors, (39795), 8877 states have internal predecessors, (39795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 39795 transitions. [2021-06-12 20:43:59,196 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 39795 transitions. Word has length 33 [2021-06-12 20:43:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:59,196 INFO L482 AbstractCegarLoop]: Abstraction has 8878 states and 39795 transitions. [2021-06-12 20:43:59,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 39795 transitions. [2021-06-12 20:43:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:43:59,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:59,211 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:59,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-12 20:43:59,412 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1269312818, now seen corresponding path program 163 times [2021-06-12 20:43:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:59,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065049910] [2021-06-12 20:43:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:59,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065049910] [2021-06-12 20:43:59,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065049910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925954122] [2021-06-12 20:43:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:43:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:59,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:59,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:59,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:59,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:59,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:43:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:59,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925954122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:59,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:59,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:43:59,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241377078] [2021-06-12 20:43:59,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:59,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:59,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:59,883 INFO L87 Difference]: Start difference. First operand 8878 states and 39795 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:02,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:02,879 INFO L93 Difference]: Finished difference Result 10250 states and 45150 transitions. [2021-06-12 20:44:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:44:02,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:02,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:02,901 INFO L225 Difference]: With dead ends: 10250 [2021-06-12 20:44:02,902 INFO L226 Difference]: Without dead ends: 10204 [2021-06-12 20:44:02,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2609.7ms TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:44:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10204 states. [2021-06-12 20:44:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10204 to 8945. [2021-06-12 20:44:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8945 states, 8944 states have (on average 4.476073345259392) internal successors, (40034), 8944 states have internal predecessors, (40034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 40034 transitions. [2021-06-12 20:44:03,058 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 40034 transitions. Word has length 33 [2021-06-12 20:44:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:03,059 INFO L482 AbstractCegarLoop]: Abstraction has 8945 states and 40034 transitions. [2021-06-12 20:44:03,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 40034 transitions. [2021-06-12 20:44:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:03,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:03,074 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:03,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:03,274 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:03,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1168419470, now seen corresponding path program 164 times [2021-06-12 20:44:03,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:03,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182714084] [2021-06-12 20:44:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:03,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:03,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182714084] [2021-06-12 20:44:03,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182714084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:03,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083145656] [2021-06-12 20:44:03,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:03,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:03,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:03,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:44:03,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:03,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:03,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:44:03,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:03,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:03,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:03,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-12 20:44:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:03,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083145656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:03,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:03,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:44:03,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800937412] [2021-06-12 20:44:03,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:03,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:03,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:03,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:03,802 INFO L87 Difference]: Start difference. First operand 8945 states and 40034 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:04,622 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-12 20:44:05,423 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-12 20:44:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:07,161 INFO L93 Difference]: Finished difference Result 10518 states and 45678 transitions. [2021-06-12 20:44:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 20:44:07,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:07,185 INFO L225 Difference]: With dead ends: 10518 [2021-06-12 20:44:07,185 INFO L226 Difference]: Without dead ends: 10427 [2021-06-12 20:44:07,185 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2982.0ms TimeCoverageRelationStatistics Valid=724, Invalid=3832, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:44:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10427 states. [2021-06-12 20:44:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10427 to 8890. [2021-06-12 20:44:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8890 states, 8889 states have (on average 4.479244009449882) internal successors, (39816), 8889 states have internal predecessors, (39816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 39816 transitions. [2021-06-12 20:44:07,347 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 39816 transitions. Word has length 33 [2021-06-12 20:44:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:07,347 INFO L482 AbstractCegarLoop]: Abstraction has 8890 states and 39816 transitions. [2021-06-12 20:44:07,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 39816 transitions. [2021-06-12 20:44:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:07,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:07,362 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:07,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:07,565 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash 799662860, now seen corresponding path program 165 times [2021-06-12 20:44:07,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:07,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107881853] [2021-06-12 20:44:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:07,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107881853] [2021-06-12 20:44:07,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107881853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600113609] [2021-06-12 20:44:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:07,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:44:07,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:07,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:07,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:08,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:44:08,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:08,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:08,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:08,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:44:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:08,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600113609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:08,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:08,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:44:08,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539794086] [2021-06-12 20:44:08,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:44:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:08,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:44:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:44:08,209 INFO L87 Difference]: Start difference. First operand 8890 states and 39816 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:08,507 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-12 20:44:10,664 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-12 20:44:10,809 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-12 20:44:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:10,958 INFO L93 Difference]: Finished difference Result 10422 states and 45056 transitions. [2021-06-12 20:44:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:44:10,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:10,981 INFO L225 Difference]: With dead ends: 10422 [2021-06-12 20:44:10,981 INFO L226 Difference]: Without dead ends: 10394 [2021-06-12 20:44:10,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2478.6ms TimeCoverageRelationStatistics Valid=608, Invalid=2698, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:44:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-06-12 20:44:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 8969. [2021-06-12 20:44:11,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 4.479371097234612) internal successors, (40171), 8968 states have internal predecessors, (40171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 40171 transitions. [2021-06-12 20:44:11,223 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 40171 transitions. Word has length 33 [2021-06-12 20:44:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:11,223 INFO L482 AbstractCegarLoop]: Abstraction has 8969 states and 40171 transitions. [2021-06-12 20:44:11,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 40171 transitions. [2021-06-12 20:44:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:11,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:11,237 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:11,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:11,438 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:11,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1209881096, now seen corresponding path program 166 times [2021-06-12 20:44:11,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:11,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9260678] [2021-06-12 20:44:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:11,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9260678] [2021-06-12 20:44:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9260678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132714299] [2021-06-12 20:44:11,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:11,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:11,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:11,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:11,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:11,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:44:11,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:11,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:11,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:11,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:44:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:11,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132714299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:11,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:11,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:11,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34489703] [2021-06-12 20:44:11,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:11,827 INFO L87 Difference]: Start difference. First operand 8969 states and 40171 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:12,633 INFO L93 Difference]: Finished difference Result 9795 states and 43141 transitions. [2021-06-12 20:44:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:44:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:12,656 INFO L225 Difference]: With dead ends: 9795 [2021-06-12 20:44:12,656 INFO L226 Difference]: Without dead ends: 9769 [2021-06-12 20:44:12,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:44:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2021-06-12 20:44:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 8979. [2021-06-12 20:44:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8979 states, 8978 states have (on average 4.47705502339051) internal successors, (40195), 8978 states have internal predecessors, (40195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8979 states to 8979 states and 40195 transitions. [2021-06-12 20:44:12,821 INFO L78 Accepts]: Start accepts. Automaton has 8979 states and 40195 transitions. Word has length 33 [2021-06-12 20:44:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:12,821 INFO L482 AbstractCegarLoop]: Abstraction has 8979 states and 40195 transitions. [2021-06-12 20:44:12,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 8979 states and 40195 transitions. [2021-06-12 20:44:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:12,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:12,836 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:13,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:13,036 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash -805007730, now seen corresponding path program 167 times [2021-06-12 20:44:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:13,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087848096] [2021-06-12 20:44:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:13,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:13,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087848096] [2021-06-12 20:44:13,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087848096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:13,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646339789] [2021-06-12 20:44:13,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:13,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:44:13,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:13,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:13,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:13,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:13,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:13,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:13,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:44:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:13,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646339789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:13,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:13,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:44:13,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082784294] [2021-06-12 20:44:13,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:13,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:13,429 INFO L87 Difference]: Start difference. First operand 8979 states and 40195 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:14,705 INFO L93 Difference]: Finished difference Result 10031 states and 44194 transitions. [2021-06-12 20:44:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:44:14,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:14,728 INFO L225 Difference]: With dead ends: 10031 [2021-06-12 20:44:14,728 INFO L226 Difference]: Without dead ends: 9921 [2021-06-12 20:44:14,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1174.3ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:44:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9921 states. [2021-06-12 20:44:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9921 to 8941. [2021-06-12 20:44:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8941 states, 8940 states have (on average 4.478523489932886) internal successors, (40038), 8940 states have internal predecessors, (40038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8941 states to 8941 states and 40038 transitions. [2021-06-12 20:44:14,887 INFO L78 Accepts]: Start accepts. Automaton has 8941 states and 40038 transitions. Word has length 33 [2021-06-12 20:44:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:14,887 INFO L482 AbstractCegarLoop]: Abstraction has 8941 states and 40038 transitions. [2021-06-12 20:44:14,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8941 states and 40038 transitions. [2021-06-12 20:44:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:14,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:14,902 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:15,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 20:44:15,102 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:15,102 INFO L82 PathProgramCache]: Analyzing trace with hash -42635380, now seen corresponding path program 168 times [2021-06-12 20:44:15,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:15,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118748643] [2021-06-12 20:44:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:15,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118748643] [2021-06-12 20:44:15,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118748643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267396154] [2021-06-12 20:44:15,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:15,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:44:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:15,449 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:44:15,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:44:15,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:15,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:15,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:15,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:44:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:15,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267396154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:15,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:15,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:44:15,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953303876] [2021-06-12 20:44:15,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:44:15,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:44:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:44:15,620 INFO L87 Difference]: Start difference. First operand 8941 states and 40038 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:16,708 INFO L93 Difference]: Finished difference Result 9481 states and 42221 transitions. [2021-06-12 20:44:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:44:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:16,730 INFO L225 Difference]: With dead ends: 9481 [2021-06-12 20:44:16,730 INFO L226 Difference]: Without dead ends: 9429 [2021-06-12 20:44:16,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 977.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:44:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-06-12 20:44:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8926. [2021-06-12 20:44:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8926 states, 8925 states have (on average 4.480560224089636) internal successors, (39989), 8925 states have internal predecessors, (39989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8926 states to 8926 states and 39989 transitions. [2021-06-12 20:44:16,933 INFO L78 Accepts]: Start accepts. Automaton has 8926 states and 39989 transitions. Word has length 33 [2021-06-12 20:44:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:16,933 INFO L482 AbstractCegarLoop]: Abstraction has 8926 states and 39989 transitions. [2021-06-12 20:44:16,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 8926 states and 39989 transitions. [2021-06-12 20:44:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:16,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:16,948 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:17,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 20:44:17,148 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1576766294, now seen corresponding path program 169 times [2021-06-12 20:44:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:17,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577244496] [2021-06-12 20:44:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:17,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:17,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577244496] [2021-06-12 20:44:17,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577244496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:17,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111290970] [2021-06-12 20:44:17,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:17,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:17,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:44:17,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:17,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:17,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:17,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:44:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:17,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111290970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:17,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:17,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:44:17,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728144049] [2021-06-12 20:44:17,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:17,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:17,620 INFO L87 Difference]: Start difference. First operand 8926 states and 39989 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:19,890 INFO L93 Difference]: Finished difference Result 11007 states and 47783 transitions. [2021-06-12 20:44:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:44:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:19,914 INFO L225 Difference]: With dead ends: 11007 [2021-06-12 20:44:19,915 INFO L226 Difference]: Without dead ends: 10988 [2021-06-12 20:44:19,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1934.7ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:44:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-06-12 20:44:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 9112. [2021-06-12 20:44:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9112 states, 9111 states have (on average 4.477554604324443) internal successors, (40795), 9111 states have internal predecessors, (40795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 40795 transitions. [2021-06-12 20:44:20,145 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 40795 transitions. Word has length 33 [2021-06-12 20:44:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:20,145 INFO L482 AbstractCegarLoop]: Abstraction has 9112 states and 40795 transitions. [2021-06-12 20:44:20,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 40795 transitions. [2021-06-12 20:44:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:20,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:20,160 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:20,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:20,361 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:20,361 INFO L82 PathProgramCache]: Analyzing trace with hash -91627148, now seen corresponding path program 170 times [2021-06-12 20:44:20,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:20,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354435162] [2021-06-12 20:44:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:20,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:20,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354435162] [2021-06-12 20:44:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354435162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:20,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57532256] [2021-06-12 20:44:20,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:20,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:20,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:20,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:44:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:20,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:20,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:20,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:44:20,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:20,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:20,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:20,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-12 20:44:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:20,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57532256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:20,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:20,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:44:20,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209241747] [2021-06-12 20:44:20,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:20,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:20,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:20,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:20,886 INFO L87 Difference]: Start difference. First operand 9112 states and 40795 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:22,263 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-12 20:44:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:24,609 INFO L93 Difference]: Finished difference Result 11343 states and 48522 transitions. [2021-06-12 20:44:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:44:24,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:24,635 INFO L225 Difference]: With dead ends: 11343 [2021-06-12 20:44:24,635 INFO L226 Difference]: Without dead ends: 11264 [2021-06-12 20:44:24,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 3241.5ms TimeCoverageRelationStatistics Valid=811, Invalid=4019, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:44:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2021-06-12 20:44:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 9065. [2021-06-12 20:44:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9065 states, 9064 states have (on average 4.480141218005295) internal successors, (40608), 9064 states have internal predecessors, (40608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9065 states to 9065 states and 40608 transitions. [2021-06-12 20:44:24,810 INFO L78 Accepts]: Start accepts. Automaton has 9065 states and 40608 transitions. Word has length 33 [2021-06-12 20:44:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:24,810 INFO L482 AbstractCegarLoop]: Abstraction has 9065 states and 40608 transitions. [2021-06-12 20:44:24,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 9065 states and 40608 transitions. [2021-06-12 20:44:24,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:24,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:24,825 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:25,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-06-12 20:44:25,026 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash -933925388, now seen corresponding path program 171 times [2021-06-12 20:44:25,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:25,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098554863] [2021-06-12 20:44:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:25,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098554863] [2021-06-12 20:44:25,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098554863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285516765] [2021-06-12 20:44:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:25,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:44:25,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:44:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:25,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:25,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:44:25,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:25,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:25,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:25,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-12 20:44:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285516765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:44:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487020582] [2021-06-12 20:44:25,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:44:25,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:25,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:44:25,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:44:25,523 INFO L87 Difference]: Start difference. First operand 9065 states and 40608 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:26,679 INFO L93 Difference]: Finished difference Result 9843 states and 43680 transitions. [2021-06-12 20:44:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:44:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:26,702 INFO L225 Difference]: With dead ends: 9843 [2021-06-12 20:44:26,702 INFO L226 Difference]: Without dead ends: 9803 [2021-06-12 20:44:26,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 992.1ms TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:44:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-06-12 20:44:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9062. [2021-06-12 20:44:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9062 states, 9061 states have (on average 4.480631276901004) internal successors, (40599), 9061 states have internal predecessors, (40599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9062 states to 9062 states and 40599 transitions. [2021-06-12 20:44:26,856 INFO L78 Accepts]: Start accepts. Automaton has 9062 states and 40599 transitions. Word has length 33 [2021-06-12 20:44:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:26,856 INFO L482 AbstractCegarLoop]: Abstraction has 9062 states and 40599 transitions. [2021-06-12 20:44:26,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 9062 states and 40599 transitions. [2021-06-12 20:44:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:26,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:26,871 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:27,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:27,071 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1264651364, now seen corresponding path program 172 times [2021-06-12 20:44:27,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:27,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353866254] [2021-06-12 20:44:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:27,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353866254] [2021-06-12 20:44:27,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353866254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974558732] [2021-06-12 20:44:27,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:27,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:27,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:27,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:27,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:44:27,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:27,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:27,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:27,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:44:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:27,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974558732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:27,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:27,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:44:27,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051196440] [2021-06-12 20:44:27,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:27,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:27,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:27,520 INFO L87 Difference]: Start difference. First operand 9062 states and 40599 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:28,812 INFO L93 Difference]: Finished difference Result 10409 states and 45790 transitions. [2021-06-12 20:44:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:44:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:28,836 INFO L225 Difference]: With dead ends: 10409 [2021-06-12 20:44:28,836 INFO L226 Difference]: Without dead ends: 10327 [2021-06-12 20:44:28,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1122.5ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:44:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10327 states. [2021-06-12 20:44:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10327 to 9047. [2021-06-12 20:44:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9047 states, 9046 states have (on average 4.4813177094848555) internal successors, (40538), 9046 states have internal predecessors, (40538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9047 states to 9047 states and 40538 transitions. [2021-06-12 20:44:29,003 INFO L78 Accepts]: Start accepts. Automaton has 9047 states and 40538 transitions. Word has length 33 [2021-06-12 20:44:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:29,003 INFO L482 AbstractCegarLoop]: Abstraction has 9047 states and 40538 transitions. [2021-06-12 20:44:29,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 9047 states and 40538 transitions. [2021-06-12 20:44:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:29,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:29,018 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:29,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:29,219 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1690605646, now seen corresponding path program 173 times [2021-06-12 20:44:29,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:29,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747608453] [2021-06-12 20:44:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:29,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747608453] [2021-06-12 20:44:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747608453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441507498] [2021-06-12 20:44:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:29,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:44:29,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:29,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:29,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:44:29,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:29,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:29,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:29,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:44:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441507498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:29,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:44:29,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029400350] [2021-06-12 20:44:29,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:29,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:29,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:29,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:29,707 INFO L87 Difference]: Start difference. First operand 9047 states and 40538 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:31,049 INFO L93 Difference]: Finished difference Result 9854 states and 43784 transitions. [2021-06-12 20:44:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:44:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:31,071 INFO L225 Difference]: With dead ends: 9854 [2021-06-12 20:44:31,071 INFO L226 Difference]: Without dead ends: 9800 [2021-06-12 20:44:31,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:44:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9800 states. [2021-06-12 20:44:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9800 to 9032. [2021-06-12 20:44:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9031 states have (on average 4.482560070867014) internal successors, (40482), 9031 states have internal predecessors, (40482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 40482 transitions. [2021-06-12 20:44:31,224 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 40482 transitions. Word has length 33 [2021-06-12 20:44:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:31,224 INFO L482 AbstractCegarLoop]: Abstraction has 9032 states and 40482 transitions. [2021-06-12 20:44:31,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 40482 transitions. [2021-06-12 20:44:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:31,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:31,239 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:31,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:31,441 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1242387220, now seen corresponding path program 174 times [2021-06-12 20:44:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:31,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375666775] [2021-06-12 20:44:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:31,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375666775] [2021-06-12 20:44:31,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375666775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743098163] [2021-06-12 20:44:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:31,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:44:31,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:31,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:31,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:31,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:44:31,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:31,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:31,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:31,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:44:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:32,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743098163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:32,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:32,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:44:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649969119] [2021-06-12 20:44:32,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:44:32,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:32,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:44:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:44:32,028 INFO L87 Difference]: Start difference. First operand 9032 states and 40482 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:32,270 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-06-12 20:44:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:34,408 INFO L93 Difference]: Finished difference Result 10361 states and 45040 transitions. [2021-06-12 20:44:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:44:34,408 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:34,432 INFO L225 Difference]: With dead ends: 10361 [2021-06-12 20:44:34,432 INFO L226 Difference]: Without dead ends: 10332 [2021-06-12 20:44:34,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2003.1ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:44:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10332 states. [2021-06-12 20:44:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10332 to 9071. [2021-06-12 20:44:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9071 states, 9070 states have (on average 4.484564498346196) internal successors, (40675), 9070 states have internal predecessors, (40675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9071 states to 9071 states and 40675 transitions. [2021-06-12 20:44:34,602 INFO L78 Accepts]: Start accepts. Automaton has 9071 states and 40675 transitions. Word has length 33 [2021-06-12 20:44:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:34,602 INFO L482 AbstractCegarLoop]: Abstraction has 9071 states and 40675 transitions. [2021-06-12 20:44:34,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 9071 states and 40675 transitions. [2021-06-12 20:44:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:34,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:34,618 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:34,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 20:44:34,819 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:34,820 INFO L82 PathProgramCache]: Analyzing trace with hash 889247730, now seen corresponding path program 175 times [2021-06-12 20:44:34,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:34,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600847618] [2021-06-12 20:44:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:35,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:35,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600847618] [2021-06-12 20:44:35,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600847618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:35,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009801774] [2021-06-12 20:44:35,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:35,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:35,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:44:35,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:35,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:35,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:35,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:44:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:35,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009801774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:35,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:35,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:44:35,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969170840] [2021-06-12 20:44:35,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:35,293 INFO L87 Difference]: Start difference. First operand 9071 states and 40675 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:38,303 INFO L93 Difference]: Finished difference Result 10371 states and 45701 transitions. [2021-06-12 20:44:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:44:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:38,327 INFO L225 Difference]: With dead ends: 10371 [2021-06-12 20:44:38,328 INFO L226 Difference]: Without dead ends: 10311 [2021-06-12 20:44:38,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2621.4ms TimeCoverageRelationStatistics Valid=680, Invalid=4432, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:44:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10311 states. [2021-06-12 20:44:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10311 to 9174. [2021-06-12 20:44:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9174 states, 9173 states have (on average 4.482175951161016) internal successors, (41115), 9173 states have internal predecessors, (41115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9174 states to 9174 states and 41115 transitions. [2021-06-12 20:44:38,576 INFO L78 Accepts]: Start accepts. Automaton has 9174 states and 41115 transitions. Word has length 33 [2021-06-12 20:44:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:38,576 INFO L482 AbstractCegarLoop]: Abstraction has 9174 states and 41115 transitions. [2021-06-12 20:44:38,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 9174 states and 41115 transitions. [2021-06-12 20:44:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:38,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:38,592 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:38,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 20:44:38,793 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash -967987278, now seen corresponding path program 176 times [2021-06-12 20:44:38,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:38,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691656368] [2021-06-12 20:44:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:39,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691656368] [2021-06-12 20:44:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691656368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716590059] [2021-06-12 20:44:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:39,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:39,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:39,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:44:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:39,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:39,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:39,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:39,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:39,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:39,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 20:44:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:39,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716590059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:39,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:39,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:44:39,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909971400] [2021-06-12 20:44:39,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:39,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:39,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:39,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:39,318 INFO L87 Difference]: Start difference. First operand 9174 states and 41115 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:40,089 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-12 20:44:40,918 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-06-12 20:44:42,451 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-12 20:44:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:42,920 INFO L93 Difference]: Finished difference Result 10950 states and 47314 transitions. [2021-06-12 20:44:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 20:44:42,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:42,943 INFO L225 Difference]: With dead ends: 10950 [2021-06-12 20:44:42,943 INFO L226 Difference]: Without dead ends: 10852 [2021-06-12 20:44:42,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 3174.0ms TimeCoverageRelationStatistics Valid=689, Invalid=4281, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:44:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10852 states. [2021-06-12 20:44:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10852 to 9119. [2021-06-12 20:44:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9119 states, 9118 states have (on average 4.485303794691818) internal successors, (40897), 9118 states have internal predecessors, (40897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9119 states to 9119 states and 40897 transitions. [2021-06-12 20:44:43,113 INFO L78 Accepts]: Start accepts. Automaton has 9119 states and 40897 transitions. Word has length 33 [2021-06-12 20:44:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:43,113 INFO L482 AbstractCegarLoop]: Abstraction has 9119 states and 40897 transitions. [2021-06-12 20:44:43,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9119 states and 40897 transitions. [2021-06-12 20:44:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:43,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:43,128 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:43,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 20:44:43,328 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 520491120, now seen corresponding path program 177 times [2021-06-12 20:44:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:43,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473655144] [2021-06-12 20:44:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:43,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473655144] [2021-06-12 20:44:43,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473655144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965784567] [2021-06-12 20:44:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:43,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:44:43,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:43,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:43,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:44:43,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:43,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:43,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:43,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:44:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965784567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:43,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:43,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:44:43,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833069299] [2021-06-12 20:44:43,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:44:43,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:44:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:44:43,940 INFO L87 Difference]: Start difference. First operand 9119 states and 40897 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:44,072 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2021-06-12 20:44:44,233 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-12 20:44:46,470 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 20:44:46,754 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-12 20:44:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:46,996 INFO L93 Difference]: Finished difference Result 10184 states and 44882 transitions. [2021-06-12 20:44:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:44:46,996 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:47,019 INFO L225 Difference]: With dead ends: 10184 [2021-06-12 20:44:47,019 INFO L226 Difference]: Without dead ends: 10138 [2021-06-12 20:44:47,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 2762.0ms TimeCoverageRelationStatistics Valid=567, Invalid=3465, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:44:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2021-06-12 20:44:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 9225. [2021-06-12 20:44:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9225 states, 9224 states have (on average 4.488291413703383) internal successors, (41400), 9224 states have internal predecessors, (41400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9225 states to 9225 states and 41400 transitions. [2021-06-12 20:44:47,189 INFO L78 Accepts]: Start accepts. Automaton has 9225 states and 41400 transitions. Word has length 33 [2021-06-12 20:44:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:47,189 INFO L482 AbstractCegarLoop]: Abstraction has 9225 states and 41400 transitions. [2021-06-12 20:44:47,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 9225 states and 41400 transitions. [2021-06-12 20:44:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:47,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:47,205 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:47,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:47,405 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 331649554, now seen corresponding path program 178 times [2021-06-12 20:44:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:47,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895258620] [2021-06-12 20:44:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:47,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:47,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895258620] [2021-06-12 20:44:47,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895258620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:47,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16008438] [2021-06-12 20:44:47,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:47,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:47,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:47,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:47,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:47,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:47,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:47,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:47,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:44:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:47,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16008438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:47,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:47,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:44:47,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23839761] [2021-06-12 20:44:47,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:47,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:47,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:47,869 INFO L87 Difference]: Start difference. First operand 9225 states and 41400 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:48,471 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-06-12 20:44:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:49,998 INFO L93 Difference]: Finished difference Result 10256 states and 45233 transitions. [2021-06-12 20:44:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:44:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:50,022 INFO L225 Difference]: With dead ends: 10256 [2021-06-12 20:44:50,022 INFO L226 Difference]: Without dead ends: 10238 [2021-06-12 20:44:50,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1884.1ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:44:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10238 states. [2021-06-12 20:44:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10238 to 9192. [2021-06-12 20:44:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9192 states, 9191 states have (on average 4.483842889783483) internal successors, (41211), 9191 states have internal predecessors, (41211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9192 states to 9192 states and 41211 transitions. [2021-06-12 20:44:50,191 INFO L78 Accepts]: Start accepts. Automaton has 9192 states and 41211 transitions. Word has length 33 [2021-06-12 20:44:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:50,191 INFO L482 AbstractCegarLoop]: Abstraction has 9192 states and 41211 transitions. [2021-06-12 20:44:50,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 9192 states and 41211 transitions. [2021-06-12 20:44:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:50,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:50,206 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:50,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:50,407 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:50,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1336743888, now seen corresponding path program 179 times [2021-06-12 20:44:50,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:50,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976421622] [2021-06-12 20:44:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:50,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:50,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976421622] [2021-06-12 20:44:50,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976421622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:50,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702524805] [2021-06-12 20:44:50,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:50,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:44:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:44:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:50,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:50,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 20:44:50,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:50,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:50,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:50,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:23 [2021-06-12 20:44:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:50,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702524805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:50,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:50,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:44:50,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997175815] [2021-06-12 20:44:50,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:44:50,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:50,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:44:50,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:44:50,918 INFO L87 Difference]: Start difference. First operand 9192 states and 41211 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:53,086 INFO L93 Difference]: Finished difference Result 11304 states and 48756 transitions. [2021-06-12 20:44:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:44:53,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:53,112 INFO L225 Difference]: With dead ends: 11304 [2021-06-12 20:44:53,112 INFO L226 Difference]: Without dead ends: 11179 [2021-06-12 20:44:53,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1933.1ms TimeCoverageRelationStatistics Valid=593, Invalid=2713, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:44:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-06-12 20:44:53,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 9143. [2021-06-12 20:44:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9143 states, 9142 states have (on average 4.483810982279588) internal successors, (40991), 9142 states have internal predecessors, (40991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9143 states to 9143 states and 40991 transitions. [2021-06-12 20:44:53,293 INFO L78 Accepts]: Start accepts. Automaton has 9143 states and 40991 transitions. Word has length 33 [2021-06-12 20:44:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:53,293 INFO L482 AbstractCegarLoop]: Abstraction has 9143 states and 40991 transitions. [2021-06-12 20:44:53,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9143 states and 40991 transitions. [2021-06-12 20:44:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:53,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:53,309 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:53,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:53,512 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2115925168, now seen corresponding path program 180 times [2021-06-12 20:44:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:53,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16233267] [2021-06-12 20:44:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:53,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:53,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16233267] [2021-06-12 20:44:53,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16233267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:53,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431274964] [2021-06-12 20:44:53,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:53,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:44:53,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:53,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:53,871 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:44:53,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:44:53,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:53,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:53,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:53,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:44:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:54,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431274964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:54,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:54,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:44:54,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377093585] [2021-06-12 20:44:54,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:44:54,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:44:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:44:54,053 INFO L87 Difference]: Start difference. First operand 9143 states and 40991 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:55,501 INFO L93 Difference]: Finished difference Result 9578 states and 42712 transitions. [2021-06-12 20:44:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:44:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:55,523 INFO L225 Difference]: With dead ends: 9578 [2021-06-12 20:44:55,523 INFO L226 Difference]: Without dead ends: 9526 [2021-06-12 20:44:55,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1164.4ms TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:44:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2021-06-12 20:44:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 9119. [2021-06-12 20:44:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9119 states, 9118 states have (on average 4.485303794691818) internal successors, (40897), 9118 states have internal predecessors, (40897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9119 states to 9119 states and 40897 transitions. [2021-06-12 20:44:55,670 INFO L78 Accepts]: Start accepts. Automaton has 9119 states and 40897 transitions. Word has length 33 [2021-06-12 20:44:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:55,670 INFO L482 AbstractCegarLoop]: Abstraction has 9119 states and 40897 transitions. [2021-06-12 20:44:55,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 9119 states and 40897 transitions. [2021-06-12 20:44:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:55,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:55,685 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:55,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-12 20:44:55,886 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:55,886 INFO L82 PathProgramCache]: Analyzing trace with hash -370798888, now seen corresponding path program 181 times [2021-06-12 20:44:55,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:55,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890374577] [2021-06-12 20:44:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:56,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:56,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890374577] [2021-06-12 20:44:56,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890374577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:56,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008658912] [2021-06-12 20:44:56,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:44:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:56,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:56,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:44:56,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:56,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:56,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:56,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:44:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008658912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:56,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:56,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:44:56,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657913847] [2021-06-12 20:44:56,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:56,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:56,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:56,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:56,365 INFO L87 Difference]: Start difference. First operand 9119 states and 40897 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:57,442 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-12 20:44:57,715 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-12 20:44:57,878 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-12 20:44:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:59,313 INFO L93 Difference]: Finished difference Result 11023 states and 48354 transitions. [2021-06-12 20:44:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:44:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:44:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:59,338 INFO L225 Difference]: With dead ends: 11023 [2021-06-12 20:44:59,338 INFO L226 Difference]: Without dead ends: 10977 [2021-06-12 20:44:59,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2540.2ms TimeCoverageRelationStatistics Valid=664, Invalid=4028, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:44:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2021-06-12 20:44:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 9316. [2021-06-12 20:44:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9316 states, 9315 states have (on average 4.485882984433709) internal successors, (41786), 9315 states have internal predecessors, (41786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9316 states to 9316 states and 41786 transitions. [2021-06-12 20:44:59,513 INFO L78 Accepts]: Start accepts. Automaton has 9316 states and 41786 transitions. Word has length 33 [2021-06-12 20:44:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:59,513 INFO L482 AbstractCegarLoop]: Abstraction has 9316 states and 41786 transitions. [2021-06-12 20:44:59,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 9316 states and 41786 transitions. [2021-06-12 20:44:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:44:59,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:59,529 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:59,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:59,729 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2066933400, now seen corresponding path program 182 times [2021-06-12 20:44:59,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:59,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683584437] [2021-06-12 20:44:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:59,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:59,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683584437] [2021-06-12 20:44:59,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683584437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:59,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295167235] [2021-06-12 20:44:59,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:59,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:59,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:44:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:00,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:00,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:45:00,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:00,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:00,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:00,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-12 20:45:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:00,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295167235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:00,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:00,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:45:00,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761558000] [2021-06-12 20:45:00,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:00,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:00,264 INFO L87 Difference]: Start difference. First operand 9316 states and 41786 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:01,438 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-12 20:45:01,847 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-12 20:45:02,578 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-12 20:45:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:04,033 INFO L93 Difference]: Finished difference Result 11461 states and 49407 transitions. [2021-06-12 20:45:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:45:04,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:04,059 INFO L225 Difference]: With dead ends: 11461 [2021-06-12 20:45:04,059 INFO L226 Difference]: Without dead ends: 11382 [2021-06-12 20:45:04,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 3259.2ms TimeCoverageRelationStatistics Valid=727, Invalid=4103, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:45:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2021-06-12 20:45:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 9276. [2021-06-12 20:45:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9276 states, 9275 states have (on average 4.487008086253369) internal successors, (41617), 9275 states have internal predecessors, (41617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9276 states to 9276 states and 41617 transitions. [2021-06-12 20:45:04,331 INFO L78 Accepts]: Start accepts. Automaton has 9276 states and 41617 transitions. Word has length 33 [2021-06-12 20:45:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:04,331 INFO L482 AbstractCegarLoop]: Abstraction has 9276 states and 41617 transitions. [2021-06-12 20:45:04,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9276 states and 41617 transitions. [2021-06-12 20:45:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:04,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:04,346 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:04,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-12 20:45:04,549 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:04,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1224635160, now seen corresponding path program 183 times [2021-06-12 20:45:04,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:04,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089632876] [2021-06-12 20:45:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:04,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:04,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089632876] [2021-06-12 20:45:04,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089632876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:04,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366426411] [2021-06-12 20:45:04,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:04,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:45:04,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:45:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:04,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:04,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:04,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:45:04,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:04,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:04,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:04,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-12 20:45:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:05,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366426411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:05,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:05,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:45:05,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981696977] [2021-06-12 20:45:05,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:05,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:05,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:05,056 INFO L87 Difference]: Start difference. First operand 9276 states and 41617 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:06,447 INFO L93 Difference]: Finished difference Result 9795 states and 43591 transitions. [2021-06-12 20:45:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:45:06,448 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:06,470 INFO L225 Difference]: With dead ends: 9795 [2021-06-12 20:45:06,470 INFO L226 Difference]: Without dead ends: 9755 [2021-06-12 20:45:06,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1018.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:45:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2021-06-12 20:45:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 9279. [2021-06-12 20:45:06,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9278 states have (on average 4.486203923259323) internal successors, (41623), 9278 states have internal predecessors, (41623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 41623 transitions. [2021-06-12 20:45:06,653 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 41623 transitions. Word has length 33 [2021-06-12 20:45:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:06,653 INFO L482 AbstractCegarLoop]: Abstraction has 9279 states and 41623 transitions. [2021-06-12 20:45:06,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 41623 transitions. [2021-06-12 20:45:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:06,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:06,674 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:06,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-12 20:45:06,875 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash -871755384, now seen corresponding path program 184 times [2021-06-12 20:45:06,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:06,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841406063] [2021-06-12 20:45:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:07,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841406063] [2021-06-12 20:45:07,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841406063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686839762] [2021-06-12 20:45:07,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:07,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:07,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:07,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:07,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:45:07,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:07,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:07,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:07,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:45:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:07,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686839762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:07,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:07,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309546320] [2021-06-12 20:45:07,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:07,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:07,376 INFO L87 Difference]: Start difference. First operand 9279 states and 41623 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:08,990 INFO L93 Difference]: Finished difference Result 10594 states and 46680 transitions. [2021-06-12 20:45:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:45:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:09,015 INFO L225 Difference]: With dead ends: 10594 [2021-06-12 20:45:09,015 INFO L226 Difference]: Without dead ends: 10512 [2021-06-12 20:45:09,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1403.8ms TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:45:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10512 states. [2021-06-12 20:45:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10512 to 9274. [2021-06-12 20:45:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 4.484309285021029) internal successors, (41583), 9273 states have internal predecessors, (41583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 41583 transitions. [2021-06-12 20:45:09,191 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 41583 transitions. Word has length 33 [2021-06-12 20:45:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:09,191 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 41583 transitions. [2021-06-12 20:45:09,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 41583 transitions. [2021-06-12 20:45:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:09,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:09,206 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:09,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-06-12 20:45:09,407 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash -445801102, now seen corresponding path program 185 times [2021-06-12 20:45:09,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:09,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238551856] [2021-06-12 20:45:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:09,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:09,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238551856] [2021-06-12 20:45:09,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238551856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:09,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780374464] [2021-06-12 20:45:09,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:09,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:45:09,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:09,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:09,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:09,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:09,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:09,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:09,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:09,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:45:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:09,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780374464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:09,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:09,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:09,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625816173] [2021-06-12 20:45:09,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:09,938 INFO L87 Difference]: Start difference. First operand 9274 states and 41583 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:11,462 INFO L93 Difference]: Finished difference Result 9901 states and 44045 transitions. [2021-06-12 20:45:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:45:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:11,486 INFO L225 Difference]: With dead ends: 9901 [2021-06-12 20:45:11,486 INFO L226 Difference]: Without dead ends: 9855 [2021-06-12 20:45:11,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:45:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-06-12 20:45:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9274. [2021-06-12 20:45:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 4.484093605090046) internal successors, (41581), 9273 states have internal predecessors, (41581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 41581 transitions. [2021-06-12 20:45:11,648 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 41581 transitions. Word has length 33 [2021-06-12 20:45:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:11,648 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 41581 transitions. [2021-06-12 20:45:11,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 41581 transitions. [2021-06-12 20:45:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:11,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:11,664 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:11,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:11,865 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash -912509024, now seen corresponding path program 186 times [2021-06-12 20:45:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:11,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348729647] [2021-06-12 20:45:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:12,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:12,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348729647] [2021-06-12 20:45:12,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348729647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:12,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138625679] [2021-06-12 20:45:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:12,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:45:12,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:12,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:12,352 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:45:12,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:45:12,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:45:12,381 INFO L628 ElimStorePlain]: treesize reduction 86, result has 20.4 percent of original size [2021-06-12 20:45:12,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:12,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:45:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:12,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138625679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:12,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:12,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:45:12,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508491028] [2021-06-12 20:45:12,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:45:12,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:12,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:45:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:45:12,487 INFO L87 Difference]: Start difference. First operand 9274 states and 41581 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:13,958 INFO L93 Difference]: Finished difference Result 9864 states and 43800 transitions. [2021-06-12 20:45:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:45:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:13,982 INFO L225 Difference]: With dead ends: 9864 [2021-06-12 20:45:13,982 INFO L226 Difference]: Without dead ends: 9813 [2021-06-12 20:45:13,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1208.4ms TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:45:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9813 states. [2021-06-12 20:45:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9813 to 9256. [2021-06-12 20:45:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9256 states, 9255 states have (on average 4.4860075634792) internal successors, (41518), 9255 states have internal predecessors, (41518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9256 states to 9256 states and 41518 transitions. [2021-06-12 20:45:14,149 INFO L78 Accepts]: Start accepts. Automaton has 9256 states and 41518 transitions. Word has length 33 [2021-06-12 20:45:14,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:14,149 INFO L482 AbstractCegarLoop]: Abstraction has 9256 states and 41518 transitions. [2021-06-12 20:45:14,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9256 states and 41518 transitions. [2021-06-12 20:45:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:14,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:14,168 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:14,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-12 20:45:14,368 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash 119396690, now seen corresponding path program 187 times [2021-06-12 20:45:14,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:14,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580902587] [2021-06-12 20:45:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:14,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580902587] [2021-06-12 20:45:14,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580902587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716605741] [2021-06-12 20:45:14,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:14,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:14,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:14,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:14,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:14,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:45:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:14,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716605741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:14,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:14,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:45:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962222865] [2021-06-12 20:45:14,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:14,942 INFO L87 Difference]: Start difference. First operand 9256 states and 41518 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:15,197 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-12 20:45:16,212 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-12 20:45:16,453 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-12 20:45:16,740 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-12 20:45:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:18,118 INFO L93 Difference]: Finished difference Result 10769 states and 47492 transitions. [2021-06-12 20:45:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:45:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:18,144 INFO L225 Difference]: With dead ends: 10769 [2021-06-12 20:45:18,144 INFO L226 Difference]: Without dead ends: 10746 [2021-06-12 20:45:18,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 2816.4ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:45:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10746 states. [2021-06-12 20:45:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10746 to 9377. [2021-06-12 20:45:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9377 states, 9376 states have (on average 4.485921501706485) internal successors, (42060), 9376 states have internal predecessors, (42060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9377 states to 9377 states and 42060 transitions. [2021-06-12 20:45:18,304 INFO L78 Accepts]: Start accepts. Automaton has 9377 states and 42060 transitions. Word has length 33 [2021-06-12 20:45:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:18,304 INFO L482 AbstractCegarLoop]: Abstraction has 9377 states and 42060 transitions. [2021-06-12 20:45:18,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9377 states and 42060 transitions. [2021-06-12 20:45:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:18,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:18,320 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:18,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:18,520 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1737838318, now seen corresponding path program 188 times [2021-06-12 20:45:18,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:18,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338658856] [2021-06-12 20:45:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:18,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:18,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338658856] [2021-06-12 20:45:18,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338658856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:18,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900457803] [2021-06-12 20:45:18,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:18,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:18,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:45:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:18,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:45:18,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:18,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:18,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:18,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-12 20:45:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:19,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900457803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:19,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:19,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:45:19,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858565243] [2021-06-12 20:45:19,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:19,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:19,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:19,051 INFO L87 Difference]: Start difference. First operand 9377 states and 42060 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:19,427 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-12 20:45:20,215 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-12 20:45:20,551 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-12 20:45:21,265 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 20:45:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:22,814 INFO L93 Difference]: Finished difference Result 11473 states and 49277 transitions. [2021-06-12 20:45:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:45:22,814 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:22,842 INFO L225 Difference]: With dead ends: 11473 [2021-06-12 20:45:22,842 INFO L226 Difference]: Without dead ends: 11394 [2021-06-12 20:45:22,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3420.5ms TimeCoverageRelationStatistics Valid=736, Invalid=3956, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:45:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-06-12 20:45:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 9328. [2021-06-12 20:45:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 4.486222794038812) internal successors, (41843), 9327 states have internal predecessors, (41843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 41843 transitions. [2021-06-12 20:45:23,031 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 41843 transitions. Word has length 33 [2021-06-12 20:45:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:23,032 INFO L482 AbstractCegarLoop]: Abstraction has 9328 states and 41843 transitions. [2021-06-12 20:45:23,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 41843 transitions. [2021-06-12 20:45:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:23,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:23,048 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:23,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-12 20:45:23,253 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1714830738, now seen corresponding path program 189 times [2021-06-12 20:45:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:23,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776011066] [2021-06-12 20:45:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:23,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776011066] [2021-06-12 20:45:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776011066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86822117] [2021-06-12 20:45:23,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:23,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:45:23,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:23,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:45:23,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:23,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:23,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:23,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:45:23,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:23,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:23,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:23,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-12 20:45:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:23,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86822117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:23,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:23,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:45:23,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96830292] [2021-06-12 20:45:23,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:23,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:23,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:23,834 INFO L87 Difference]: Start difference. First operand 9328 states and 41843 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:25,156 INFO L93 Difference]: Finished difference Result 9773 states and 43510 transitions. [2021-06-12 20:45:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:45:25,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:25,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:25,178 INFO L225 Difference]: With dead ends: 9773 [2021-06-12 20:45:25,178 INFO L226 Difference]: Without dead ends: 9733 [2021-06-12 20:45:25,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1089.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:45:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9733 states. [2021-06-12 20:45:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9733 to 9331. [2021-06-12 20:45:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9331 states, 9330 states have (on average 4.485423365487674) internal successors, (41849), 9330 states have internal predecessors, (41849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9331 states to 9331 states and 41849 transitions. [2021-06-12 20:45:25,339 INFO L78 Accepts]: Start accepts. Automaton has 9331 states and 41849 transitions. Word has length 33 [2021-06-12 20:45:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:25,339 INFO L482 AbstractCegarLoop]: Abstraction has 9331 states and 41849 transitions. [2021-06-12 20:45:25,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 9331 states and 41849 transitions. [2021-06-12 20:45:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:25,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:25,354 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:25,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 20:45:25,555 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash -381559806, now seen corresponding path program 190 times [2021-06-12 20:45:25,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:25,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670715943] [2021-06-12 20:45:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:25,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:25,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670715943] [2021-06-12 20:45:25,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670715943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:25,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059764872] [2021-06-12 20:45:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:25,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:25,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:25,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:45:25,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:25,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:25,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:25,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:45:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:25,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059764872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:25,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:25,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:25,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709851954] [2021-06-12 20:45:25,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:25,974 INFO L87 Difference]: Start difference. First operand 9331 states and 41849 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:27,525 INFO L93 Difference]: Finished difference Result 10297 states and 45729 transitions. [2021-06-12 20:45:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:45:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:27,557 INFO L225 Difference]: With dead ends: 10297 [2021-06-12 20:45:27,558 INFO L226 Difference]: Without dead ends: 10246 [2021-06-12 20:45:27,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1180.5ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:45:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10246 states. [2021-06-12 20:45:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10246 to 9307. [2021-06-12 20:45:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9307 states, 9306 states have (on average 4.485600687728347) internal successors, (41743), 9306 states have internal predecessors, (41743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 41743 transitions. [2021-06-12 20:45:27,721 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 41743 transitions. Word has length 33 [2021-06-12 20:45:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:27,722 INFO L482 AbstractCegarLoop]: Abstraction has 9307 states and 41743 transitions. [2021-06-12 20:45:27,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 41743 transitions. [2021-06-12 20:45:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:27,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:27,737 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:27,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-12 20:45:27,938 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:27,938 INFO L82 PathProgramCache]: Analyzing trace with hash 44394476, now seen corresponding path program 191 times [2021-06-12 20:45:27,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:27,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41800052] [2021-06-12 20:45:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:28,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41800052] [2021-06-12 20:45:28,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41800052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203501998] [2021-06-12 20:45:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:28,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:45:28,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:28,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:28,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:28,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:28,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:28,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:28,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:45:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:28,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203501998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:28,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:28,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362419761] [2021-06-12 20:45:28,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:28,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:28,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:28,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:28,376 INFO L87 Difference]: Start difference. First operand 9307 states and 41743 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:29,997 INFO L93 Difference]: Finished difference Result 9951 states and 44216 transitions. [2021-06-12 20:45:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:45:29,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:30,022 INFO L225 Difference]: With dead ends: 9951 [2021-06-12 20:45:30,022 INFO L226 Difference]: Without dead ends: 9890 [2021-06-12 20:45:30,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1267.4ms TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:45:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9890 states. [2021-06-12 20:45:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9890 to 9307. [2021-06-12 20:45:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9307 states, 9306 states have (on average 4.485385772619815) internal successors, (41741), 9306 states have internal predecessors, (41741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 41741 transitions. [2021-06-12 20:45:30,190 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 41741 transitions. Word has length 33 [2021-06-12 20:45:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:30,190 INFO L482 AbstractCegarLoop]: Abstraction has 9307 states and 41741 transitions. [2021-06-12 20:45:30,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 41741 transitions. [2021-06-12 20:45:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:30,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:30,207 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:30,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-12 20:45:30,407 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:30,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash -422313446, now seen corresponding path program 192 times [2021-06-12 20:45:30,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:30,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209345545] [2021-06-12 20:45:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:30,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:30,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209345545] [2021-06-12 20:45:30,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209345545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:30,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127794673] [2021-06-12 20:45:30,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:30,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:45:30,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:45:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:30,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:30,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:30,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:45:30,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:30,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:30,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:30,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-12 20:45:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:30,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127794673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:30,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:30,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:45:30,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479344422] [2021-06-12 20:45:30,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:30,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:30,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:30,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:30,968 INFO L87 Difference]: Start difference. First operand 9307 states and 41741 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:32,129 INFO L93 Difference]: Finished difference Result 9781 states and 43481 transitions. [2021-06-12 20:45:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:45:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:32,152 INFO L225 Difference]: With dead ends: 9781 [2021-06-12 20:45:32,152 INFO L226 Difference]: Without dead ends: 9730 [2021-06-12 20:45:32,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:45:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9730 states. [2021-06-12 20:45:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9730 to 9286. [2021-06-12 20:45:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9286 states, 9285 states have (on average 4.484329563812601) internal successors, (41637), 9285 states have internal predecessors, (41637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9286 states to 9286 states and 41637 transitions. [2021-06-12 20:45:32,313 INFO L78 Accepts]: Start accepts. Automaton has 9286 states and 41637 transitions. Word has length 33 [2021-06-12 20:45:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:32,314 INFO L482 AbstractCegarLoop]: Abstraction has 9286 states and 41637 transitions. [2021-06-12 20:45:32,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9286 states and 41637 transitions. [2021-06-12 20:45:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:32,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:32,411 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:32,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:32,612 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash 945184146, now seen corresponding path program 193 times [2021-06-12 20:45:32,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:32,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946782640] [2021-06-12 20:45:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:32,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:32,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946782640] [2021-06-12 20:45:32,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946782640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:32,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464364879] [2021-06-12 20:45:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:33,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:33,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:33,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:33,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:33,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:45:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:33,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464364879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:33,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:33,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933039286] [2021-06-12 20:45:33,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:33,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:33,068 INFO L87 Difference]: Start difference. First operand 9286 states and 41637 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:34,401 INFO L93 Difference]: Finished difference Result 9716 states and 43359 transitions. [2021-06-12 20:45:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:45:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:34,423 INFO L225 Difference]: With dead ends: 9716 [2021-06-12 20:45:34,423 INFO L226 Difference]: Without dead ends: 9664 [2021-06-12 20:45:34,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1096.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:45:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-06-12 20:45:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 9286. [2021-06-12 20:45:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9286 states, 9285 states have (on average 4.484114162627894) internal successors, (41635), 9285 states have internal predecessors, (41635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9286 states to 9286 states and 41635 transitions. [2021-06-12 20:45:34,581 INFO L78 Accepts]: Start accepts. Automaton has 9286 states and 41635 transitions. Word has length 33 [2021-06-12 20:45:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:34,581 INFO L482 AbstractCegarLoop]: Abstraction has 9286 states and 41635 transitions. [2021-06-12 20:45:34,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 9286 states and 41635 transitions. [2021-06-12 20:45:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:34,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:34,598 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:34,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-12 20:45:34,798 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash 186825264, now seen corresponding path program 194 times [2021-06-12 20:45:34,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:34,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62804411] [2021-06-12 20:45:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:34,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62804411] [2021-06-12 20:45:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62804411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743110464] [2021-06-12 20:45:34,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:35,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:35,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:35,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:45:35,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:35,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:35,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:35,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-12 20:45:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:35,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743110464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:35,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:35,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:45:35,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799385660] [2021-06-12 20:45:35,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:35,356 INFO L87 Difference]: Start difference. First operand 9286 states and 41635 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:36,469 INFO L93 Difference]: Finished difference Result 9860 states and 43914 transitions. [2021-06-12 20:45:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:45:36,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:36,492 INFO L225 Difference]: With dead ends: 9860 [2021-06-12 20:45:36,492 INFO L226 Difference]: Without dead ends: 9807 [2021-06-12 20:45:36,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 952.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:45:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9807 states. [2021-06-12 20:45:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9807 to 9256. [2021-06-12 20:45:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9256 states, 9255 states have (on average 4.4860075634792) internal successors, (41518), 9255 states have internal predecessors, (41518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9256 states to 9256 states and 41518 transitions. [2021-06-12 20:45:36,646 INFO L78 Accepts]: Start accepts. Automaton has 9256 states and 41518 transitions. Word has length 33 [2021-06-12 20:45:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:36,646 INFO L482 AbstractCegarLoop]: Abstraction has 9256 states and 41518 transitions. [2021-06-12 20:45:36,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 9256 states and 41518 transitions. [2021-06-12 20:45:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:36,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:36,661 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:36,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-12 20:45:36,862 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1229275904, now seen corresponding path program 1 times [2021-06-12 20:45:36,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:36,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017953855] [2021-06-12 20:45:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:37,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:37,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017953855] [2021-06-12 20:45:37,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017953855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:37,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657369229] [2021-06-12 20:45:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:37,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:37,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:37,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:37,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:37,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:45:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:37,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657369229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:37,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:37,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996326888] [2021-06-12 20:45:37,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:37,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:37,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:37,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:37,297 INFO L87 Difference]: Start difference. First operand 9256 states and 41518 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:38,623 INFO L93 Difference]: Finished difference Result 10318 states and 45839 transitions. [2021-06-12 20:45:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:45:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:38,648 INFO L225 Difference]: With dead ends: 10318 [2021-06-12 20:45:38,648 INFO L226 Difference]: Without dead ends: 10269 [2021-06-12 20:45:38,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:45:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10269 states. [2021-06-12 20:45:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10269 to 9329. [2021-06-12 20:45:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9329 states, 9328 states have (on average 4.487135506003431) internal successors, (41856), 9328 states have internal predecessors, (41856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9329 states to 9329 states and 41856 transitions. [2021-06-12 20:45:38,810 INFO L78 Accepts]: Start accepts. Automaton has 9329 states and 41856 transitions. Word has length 33 [2021-06-12 20:45:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:38,810 INFO L482 AbstractCegarLoop]: Abstraction has 9329 states and 41856 transitions. [2021-06-12 20:45:38,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 9329 states and 41856 transitions. [2021-06-12 20:45:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:38,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:38,826 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:39,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:39,026 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:39,027 INFO L82 PathProgramCache]: Analyzing trace with hash 994565066, now seen corresponding path program 2 times [2021-06-12 20:45:39,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:39,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966772039] [2021-06-12 20:45:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:39,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:39,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966772039] [2021-06-12 20:45:39,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966772039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:39,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043323967] [2021-06-12 20:45:39,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:39,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:39,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:39,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:39,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:39,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-12 20:45:39,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:39,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:39,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:39,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-12 20:45:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:39,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043323967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:39,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:39,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:45:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205377114] [2021-06-12 20:45:39,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:39,558 INFO L87 Difference]: Start difference. First operand 9329 states and 41856 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:40,836 INFO L93 Difference]: Finished difference Result 10470 states and 46458 transitions. [2021-06-12 20:45:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:45:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:40,860 INFO L225 Difference]: With dead ends: 10470 [2021-06-12 20:45:40,860 INFO L226 Difference]: Without dead ends: 10430 [2021-06-12 20:45:40,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 888.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:45:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10430 states. [2021-06-12 20:45:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10430 to 9329. [2021-06-12 20:45:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9329 states, 9328 states have (on average 4.487135506003431) internal successors, (41856), 9328 states have internal predecessors, (41856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9329 states to 9329 states and 41856 transitions. [2021-06-12 20:45:41,134 INFO L78 Accepts]: Start accepts. Automaton has 9329 states and 41856 transitions. Word has length 33 [2021-06-12 20:45:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:41,134 INFO L482 AbstractCegarLoop]: Abstraction has 9329 states and 41856 transitions. [2021-06-12 20:45:41,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 9329 states and 41856 transitions. [2021-06-12 20:45:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:41,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:41,152 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:41,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-12 20:45:41,353 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash 430967642, now seen corresponding path program 3 times [2021-06-12 20:45:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:41,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931645078] [2021-06-12 20:45:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:41,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931645078] [2021-06-12 20:45:41,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931645078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:41,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041063960] [2021-06-12 20:45:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:41,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:41,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:41,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:41,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:41,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-12 20:45:41,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:41,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:41,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:41,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-12 20:45:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:41,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041063960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:41,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:41,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:45:41,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983253614] [2021-06-12 20:45:41,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:41,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:41,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:41,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:41,848 INFO L87 Difference]: Start difference. First operand 9329 states and 41856 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:43,045 INFO L93 Difference]: Finished difference Result 10488 states and 46480 transitions. [2021-06-12 20:45:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:45:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:43,069 INFO L225 Difference]: With dead ends: 10488 [2021-06-12 20:45:43,070 INFO L226 Difference]: Without dead ends: 10457 [2021-06-12 20:45:43,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 925.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:45:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10457 states. [2021-06-12 20:45:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10457 to 9332. [2021-06-12 20:45:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9331 states have (on average 4.486335869681706) internal successors, (41862), 9331 states have internal predecessors, (41862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 41862 transitions. [2021-06-12 20:45:43,238 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 41862 transitions. Word has length 33 [2021-06-12 20:45:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:43,238 INFO L482 AbstractCegarLoop]: Abstraction has 9332 states and 41862 transitions. [2021-06-12 20:45:43,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 41862 transitions. [2021-06-12 20:45:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:43,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:43,254 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:43,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:43,454 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash 59742636, now seen corresponding path program 4 times [2021-06-12 20:45:43,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:43,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622266700] [2021-06-12 20:45:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:43,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:43,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622266700] [2021-06-12 20:45:43,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622266700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:43,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319507752] [2021-06-12 20:45:43,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:43,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:43,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:43,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:43,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:43,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:43,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:45:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:43,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319507752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:43,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:43,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:45:43,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559179985] [2021-06-12 20:45:43,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:43,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:43,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:43,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:43,988 INFO L87 Difference]: Start difference. First operand 9332 states and 41862 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:45,093 INFO L93 Difference]: Finished difference Result 10515 states and 46575 transitions. [2021-06-12 20:45:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:45:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:45,116 INFO L225 Difference]: With dead ends: 10515 [2021-06-12 20:45:45,116 INFO L226 Difference]: Without dead ends: 10492 [2021-06-12 20:45:45,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:45:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10492 states. [2021-06-12 20:45:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10492 to 9412. [2021-06-12 20:45:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9412 states, 9411 states have (on average 4.482839230687493) internal successors, (42188), 9411 states have internal predecessors, (42188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9412 states to 9412 states and 42188 transitions. [2021-06-12 20:45:45,285 INFO L78 Accepts]: Start accepts. Automaton has 9412 states and 42188 transitions. Word has length 33 [2021-06-12 20:45:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:45,285 INFO L482 AbstractCegarLoop]: Abstraction has 9412 states and 42188 transitions. [2021-06-12 20:45:45,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 9412 states and 42188 transitions. [2021-06-12 20:45:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:45,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:45,301 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:45,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-12 20:45:45,501 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1608650806, now seen corresponding path program 5 times [2021-06-12 20:45:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:45,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852960248] [2021-06-12 20:45:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:45,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:45,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852960248] [2021-06-12 20:45:45,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852960248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:45,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145326002] [2021-06-12 20:45:45,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:45,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:45:45,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:45,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:45,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:45,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:45,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:45,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:45,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:45:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145326002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:45,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:45,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:45,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081758752] [2021-06-12 20:45:45,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:45,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:45,906 INFO L87 Difference]: Start difference. First operand 9412 states and 42188 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:47,012 INFO L93 Difference]: Finished difference Result 10523 states and 46588 transitions. [2021-06-12 20:45:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:45:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:47,036 INFO L225 Difference]: With dead ends: 10523 [2021-06-12 20:45:47,036 INFO L226 Difference]: Without dead ends: 10431 [2021-06-12 20:45:47,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 811.6ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:45:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-06-12 20:45:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9349. [2021-06-12 20:45:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9349 states, 9348 states have (on average 4.486093281985451) internal successors, (41936), 9348 states have internal predecessors, (41936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9349 states to 9349 states and 41936 transitions. [2021-06-12 20:45:47,203 INFO L78 Accepts]: Start accepts. Automaton has 9349 states and 41936 transitions. Word has length 33 [2021-06-12 20:45:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:47,203 INFO L482 AbstractCegarLoop]: Abstraction has 9349 states and 41936 transitions. [2021-06-12 20:45:47,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 9349 states and 41936 transitions. [2021-06-12 20:45:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:47,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:47,219 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:47,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:47,420 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1464921280, now seen corresponding path program 6 times [2021-06-12 20:45:47,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:47,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881681529] [2021-06-12 20:45:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:47,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:47,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881681529] [2021-06-12 20:45:47,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881681529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:47,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878271009] [2021-06-12 20:45:47,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:47,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:45:47,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:47,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:47,806 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:45:47,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:45:47,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:45:47,833 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-12 20:45:47,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:47,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:45:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878271009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:47,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:47,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:45:47,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654421992] [2021-06-12 20:45:47,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:45:47,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:45:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:45:47,954 INFO L87 Difference]: Start difference. First operand 9349 states and 41936 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:49,234 INFO L93 Difference]: Finished difference Result 10222 states and 45422 transitions. [2021-06-12 20:45:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:45:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:49,257 INFO L225 Difference]: With dead ends: 10222 [2021-06-12 20:45:49,258 INFO L226 Difference]: Without dead ends: 10161 [2021-06-12 20:45:49,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1001.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:45:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10161 states. [2021-06-12 20:45:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10161 to 9297. [2021-06-12 20:45:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 4.486983648881239) internal successors, (41711), 9296 states have internal predecessors, (41711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 41711 transitions. [2021-06-12 20:45:49,487 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 41711 transitions. Word has length 33 [2021-06-12 20:45:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:49,487 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 41711 transitions. [2021-06-12 20:45:49,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 41711 transitions. [2021-06-12 20:45:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:49,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:49,503 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:49,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:49,704 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1400826684, now seen corresponding path program 7 times [2021-06-12 20:45:49,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:49,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968337638] [2021-06-12 20:45:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:49,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:49,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968337638] [2021-06-12 20:45:49,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968337638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:49,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952032670] [2021-06-12 20:45:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:49,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:50,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:50,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:50,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:50,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:50,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:45:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:50,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952032670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:50,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:50,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:45:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315023637] [2021-06-12 20:45:50,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:50,102 INFO L87 Difference]: Start difference. First operand 9297 states and 41711 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:51,251 INFO L93 Difference]: Finished difference Result 10135 states and 45191 transitions. [2021-06-12 20:45:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:45:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:51,275 INFO L225 Difference]: With dead ends: 10135 [2021-06-12 20:45:51,275 INFO L226 Difference]: Without dead ends: 10106 [2021-06-12 20:45:51,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 899.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:45:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-06-12 20:45:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9318. [2021-06-12 20:45:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9318 states, 9317 states have (on average 4.488247289900182) internal successors, (41817), 9317 states have internal predecessors, (41817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 41817 transitions. [2021-06-12 20:45:51,435 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 41817 transitions. Word has length 33 [2021-06-12 20:45:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:51,435 INFO L482 AbstractCegarLoop]: Abstraction has 9318 states and 41817 transitions. [2021-06-12 20:45:51,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 41817 transitions. [2021-06-12 20:45:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:51,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:51,451 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:51,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 20:45:51,651 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1047687194, now seen corresponding path program 8 times [2021-06-12 20:45:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:51,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883553836] [2021-06-12 20:45:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:51,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:51,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883553836] [2021-06-12 20:45:51,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883553836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:51,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139991224] [2021-06-12 20:45:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:51,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:51,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:51,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:45:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:52,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:52,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:45:52,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:52,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:52,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:52,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 20:45:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:52,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139991224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:52,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:52,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:45:52,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201046231] [2021-06-12 20:45:52,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:52,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:52,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:52,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:52,207 INFO L87 Difference]: Start difference. First operand 9318 states and 41817 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:53,887 INFO L93 Difference]: Finished difference Result 10268 states and 45667 transitions. [2021-06-12 20:45:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:45:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:53,912 INFO L225 Difference]: With dead ends: 10268 [2021-06-12 20:45:53,912 INFO L226 Difference]: Without dead ends: 10245 [2021-06-12 20:45:53,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1460.0ms TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:45:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2021-06-12 20:45:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 9327. [2021-06-12 20:45:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 4.48745442847952) internal successors, (41850), 9326 states have internal predecessors, (41850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 41850 transitions. [2021-06-12 20:45:54,075 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 41850 transitions. Word has length 33 [2021-06-12 20:45:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:54,075 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 41850 transitions. [2021-06-12 20:45:54,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 41850 transitions. [2021-06-12 20:45:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:54,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:54,090 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:54,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 20:45:54,291 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:54,291 INFO L82 PathProgramCache]: Analyzing trace with hash 858845628, now seen corresponding path program 9 times [2021-06-12 20:45:54,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:54,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211533064] [2021-06-12 20:45:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:54,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211533064] [2021-06-12 20:45:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211533064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260562169] [2021-06-12 20:45:54,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:54,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:45:54,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:54,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:45:54,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:54,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:54,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:54,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:45:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:54,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260562169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:54,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:54,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:45:54,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798412906] [2021-06-12 20:45:54,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:45:54,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:45:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:45:54,900 INFO L87 Difference]: Start difference. First operand 9327 states and 41850 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:56,138 INFO L93 Difference]: Finished difference Result 9832 states and 43850 transitions. [2021-06-12 20:45:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:45:56,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:56,160 INFO L225 Difference]: With dead ends: 9832 [2021-06-12 20:45:56,161 INFO L226 Difference]: Without dead ends: 9823 [2021-06-12 20:45:56,161 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1180.0ms TimeCoverageRelationStatistics Valid=382, Invalid=1688, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:45:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-06-12 20:45:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 9330. [2021-06-12 20:45:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9329 states have (on average 4.48665451816915) internal successors, (41856), 9329 states have internal predecessors, (41856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 41856 transitions. [2021-06-12 20:45:56,316 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 41856 transitions. Word has length 33 [2021-06-12 20:45:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:56,316 INFO L482 AbstractCegarLoop]: Abstraction has 9330 states and 41856 transitions. [2021-06-12 20:45:56,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 41856 transitions. [2021-06-12 20:45:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:56,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:56,332 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:56,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-12 20:45:56,533 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -809547814, now seen corresponding path program 10 times [2021-06-12 20:45:56,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:56,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473912044] [2021-06-12 20:45:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:56,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:56,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473912044] [2021-06-12 20:45:56,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473912044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:56,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791591284] [2021-06-12 20:45:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:56,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:56,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:56,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:45:56,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:56,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:56,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:56,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:45:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791591284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:56,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:56,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:56,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608431060] [2021-06-12 20:45:56,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:56,912 INFO L87 Difference]: Start difference. First operand 9330 states and 41856 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:58,008 INFO L93 Difference]: Finished difference Result 10245 states and 45535 transitions. [2021-06-12 20:45:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:45:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:58,031 INFO L225 Difference]: With dead ends: 10245 [2021-06-12 20:45:58,031 INFO L226 Difference]: Without dead ends: 10203 [2021-06-12 20:45:58,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 912.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1545, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:45:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2021-06-12 20:45:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 9376. [2021-06-12 20:45:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9376 states, 9375 states have (on average 4.4858666666666664) internal successors, (42055), 9375 states have internal predecessors, (42055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 42055 transitions. [2021-06-12 20:45:58,198 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 42055 transitions. Word has length 33 [2021-06-12 20:45:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:58,198 INFO L482 AbstractCegarLoop]: Abstraction has 9376 states and 42055 transitions. [2021-06-12 20:45:58,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 42055 transitions. [2021-06-12 20:45:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:45:58,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:58,214 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:58,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:58,414 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1323693038, now seen corresponding path program 11 times [2021-06-12 20:45:58,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:58,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060860084] [2021-06-12 20:45:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:58,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:58,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060860084] [2021-06-12 20:45:58,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060860084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:58,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590004609] [2021-06-12 20:45:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:58,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:45:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:45:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:58,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:58,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:45:58,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:58,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:58,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:58,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:45:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:58,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590004609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:58,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:58,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:45:58,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506410909] [2021-06-12 20:45:58,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:58,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:58,809 INFO L87 Difference]: Start difference. First operand 9376 states and 42055 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:59,811 INFO L93 Difference]: Finished difference Result 10267 states and 45721 transitions. [2021-06-12 20:45:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:45:59,811 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:45:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:59,835 INFO L225 Difference]: With dead ends: 10267 [2021-06-12 20:45:59,835 INFO L226 Difference]: Without dead ends: 10201 [2021-06-12 20:45:59,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 774.2ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:45:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10201 states. [2021-06-12 20:45:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10201 to 9315. [2021-06-12 20:45:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9315 states, 9314 states have (on average 4.487652995490659) internal successors, (41798), 9314 states have internal predecessors, (41798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:00,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 41798 transitions. [2021-06-12 20:46:00,001 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 41798 transitions. Word has length 33 [2021-06-12 20:46:00,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:00,001 INFO L482 AbstractCegarLoop]: Abstraction has 9315 states and 41798 transitions. [2021-06-12 20:46:00,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 41798 transitions. [2021-06-12 20:46:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:00,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:00,019 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:00,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:00,220 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:00,220 INFO L82 PathProgramCache]: Analyzing trace with hash -165780716, now seen corresponding path program 12 times [2021-06-12 20:46:00,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:00,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058110252] [2021-06-12 20:46:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:00,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:00,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058110252] [2021-06-12 20:46:00,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058110252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:00,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880340827] [2021-06-12 20:46:00,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:00,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:00,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:00,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:00,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:00,578 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:46:00,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:46:00,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:00,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:00,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:00,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:46:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:00,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880340827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:00,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:00,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:46:00,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573429085] [2021-06-12 20:46:00,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:46:00,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:00,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:46:00,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:46:00,754 INFO L87 Difference]: Start difference. First operand 9315 states and 41798 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:01,941 INFO L93 Difference]: Finished difference Result 10129 states and 45041 transitions. [2021-06-12 20:46:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:46:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:01,964 INFO L225 Difference]: With dead ends: 10129 [2021-06-12 20:46:01,964 INFO L226 Difference]: Without dead ends: 10106 [2021-06-12 20:46:01,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 998.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:46:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-06-12 20:46:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9336. [2021-06-12 20:46:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 9335 states have (on average 4.487948580610605) internal successors, (41895), 9335 states have internal predecessors, (41895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 41895 transitions. [2021-06-12 20:46:02,186 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 41895 transitions. Word has length 33 [2021-06-12 20:46:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:02,186 INFO L482 AbstractCegarLoop]: Abstraction has 9336 states and 41895 transitions. [2021-06-12 20:46:02,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 41895 transitions. [2021-06-12 20:46:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:02,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:02,202 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:02,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:02,402 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash -354622282, now seen corresponding path program 13 times [2021-06-12 20:46:02,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:02,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588854672] [2021-06-12 20:46:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:02,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:02,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588854672] [2021-06-12 20:46:02,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588854672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:02,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595779502] [2021-06-12 20:46:02,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:02,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:02,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:02,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:02,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:02,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:02,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:46:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:02,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595779502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:02,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:02,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:02,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552401728] [2021-06-12 20:46:02,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:02,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:02,789 INFO L87 Difference]: Start difference. First operand 9336 states and 41895 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:03,748 INFO L93 Difference]: Finished difference Result 10340 states and 45955 transitions. [2021-06-12 20:46:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:46:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:03,771 INFO L225 Difference]: With dead ends: 10340 [2021-06-12 20:46:03,771 INFO L226 Difference]: Without dead ends: 10331 [2021-06-12 20:46:03,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:46:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-06-12 20:46:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 9388. [2021-06-12 20:46:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9388 states, 9387 states have (on average 4.486204325130499) internal successors, (42112), 9387 states have internal predecessors, (42112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9388 states to 9388 states and 42112 transitions. [2021-06-12 20:46:03,927 INFO L78 Accepts]: Start accepts. Automaton has 9388 states and 42112 transitions. Word has length 33 [2021-06-12 20:46:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:03,927 INFO L482 AbstractCegarLoop]: Abstraction has 9388 states and 42112 transitions. [2021-06-12 20:46:03,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 9388 states and 42112 transitions. [2021-06-12 20:46:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:03,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:03,943 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:04,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 20:46:04,143 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2023015724, now seen corresponding path program 14 times [2021-06-12 20:46:04,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:04,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494695504] [2021-06-12 20:46:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:04,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:04,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494695504] [2021-06-12 20:46:04,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494695504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:04,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761684806] [2021-06-12 20:46:04,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:04,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:46:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:04,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:04,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:46:04,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:04,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:04,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:04,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 20:46:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:04,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761684806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:04,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:04,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:04,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030966725] [2021-06-12 20:46:04,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:04,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:04,677 INFO L87 Difference]: Start difference. First operand 9388 states and 42112 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:06,355 INFO L93 Difference]: Finished difference Result 10215 states and 45356 transitions. [2021-06-12 20:46:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:46:06,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:06,380 INFO L225 Difference]: With dead ends: 10215 [2021-06-12 20:46:06,380 INFO L226 Difference]: Without dead ends: 10136 [2021-06-12 20:46:06,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1392.0ms TimeCoverageRelationStatistics Valid=507, Invalid=2355, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:46:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-12 20:46:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 9339. [2021-06-12 20:46:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9339 states, 9338 states have (on average 4.486506746626687) internal successors, (41895), 9338 states have internal predecessors, (41895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9339 states to 9339 states and 41895 transitions. [2021-06-12 20:46:06,558 INFO L78 Accepts]: Start accepts. Automaton has 9339 states and 41895 transitions. Word has length 33 [2021-06-12 20:46:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:06,558 INFO L482 AbstractCegarLoop]: Abstraction has 9339 states and 41895 transitions. [2021-06-12 20:46:06,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 9339 states and 41895 transitions. [2021-06-12 20:46:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:06,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:06,574 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:06,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-12 20:46:06,774 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1429653332, now seen corresponding path program 15 times [2021-06-12 20:46:06,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:06,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950569151] [2021-06-12 20:46:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:06,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:06,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950569151] [2021-06-12 20:46:06,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950569151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:06,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070298072] [2021-06-12 20:46:06,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:06,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:06,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:06,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:07,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:07,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:46:07,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:07,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:07,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:07,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:46:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:07,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070298072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:07,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:07,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:46:07,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747599724] [2021-06-12 20:46:07,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:46:07,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:07,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:46:07,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:46:07,387 INFO L87 Difference]: Start difference. First operand 9339 states and 41895 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:08,888 INFO L93 Difference]: Finished difference Result 10230 states and 45553 transitions. [2021-06-12 20:46:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:46:08,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:08,911 INFO L225 Difference]: With dead ends: 10230 [2021-06-12 20:46:08,911 INFO L226 Difference]: Without dead ends: 10190 [2021-06-12 20:46:08,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1224.2ms TimeCoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:46:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-06-12 20:46:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 9339. [2021-06-12 20:46:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9339 states, 9338 states have (on average 4.486185478689227) internal successors, (41892), 9338 states have internal predecessors, (41892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9339 states to 9339 states and 41892 transitions. [2021-06-12 20:46:09,072 INFO L78 Accepts]: Start accepts. Automaton has 9339 states and 41892 transitions. Word has length 33 [2021-06-12 20:46:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:09,073 INFO L482 AbstractCegarLoop]: Abstraction has 9339 states and 41892 transitions. [2021-06-12 20:46:09,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 9339 states and 41892 transitions. [2021-06-12 20:46:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:09,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:09,088 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:09,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:09,288 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -666737212, now seen corresponding path program 16 times [2021-06-12 20:46:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:09,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414104766] [2021-06-12 20:46:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:09,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414104766] [2021-06-12 20:46:09,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414104766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059563143] [2021-06-12 20:46:09,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:09,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:09,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:09,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:09,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:09,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:09,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:09,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:46:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:09,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059563143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:09,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:09,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:46:09,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597568842] [2021-06-12 20:46:09,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:09,685 INFO L87 Difference]: Start difference. First operand 9339 states and 41892 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:11,052 INFO L93 Difference]: Finished difference Result 10454 states and 46522 transitions. [2021-06-12 20:46:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:46:11,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:11,076 INFO L225 Difference]: With dead ends: 10454 [2021-06-12 20:46:11,076 INFO L226 Difference]: Without dead ends: 10403 [2021-06-12 20:46:11,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1129.8ms TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:46:11,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2021-06-12 20:46:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 9315. [2021-06-12 20:46:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9315 states, 9314 states have (on average 4.487652995490659) internal successors, (41798), 9314 states have internal predecessors, (41798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 41798 transitions. [2021-06-12 20:46:11,241 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 41798 transitions. Word has length 33 [2021-06-12 20:46:11,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:11,241 INFO L482 AbstractCegarLoop]: Abstraction has 9315 states and 41798 transitions. [2021-06-12 20:46:11,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 41798 transitions. [2021-06-12 20:46:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:11,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:11,256 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:11,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-12 20:46:11,457 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:11,457 INFO L82 PathProgramCache]: Analyzing trace with hash -932503890, now seen corresponding path program 17 times [2021-06-12 20:46:11,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:11,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753357665] [2021-06-12 20:46:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:11,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:11,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753357665] [2021-06-12 20:46:11,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753357665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:11,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272457527] [2021-06-12 20:46:11,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:11,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:46:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:11,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:11,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:11,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:11,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:46:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272457527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:11,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:11,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:11,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79386971] [2021-06-12 20:46:11,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:11,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:11,861 INFO L87 Difference]: Start difference. First operand 9315 states and 41798 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:13,255 INFO L93 Difference]: Finished difference Result 10452 states and 46490 transitions. [2021-06-12 20:46:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:46:13,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:13,278 INFO L225 Difference]: With dead ends: 10452 [2021-06-12 20:46:13,278 INFO L226 Difference]: Without dead ends: 10437 [2021-06-12 20:46:13,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 961.9ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:46:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-06-12 20:46:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9348. [2021-06-12 20:46:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9348 states, 9347 states have (on average 4.489247887022574) internal successors, (41961), 9347 states have internal predecessors, (41961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9348 states to 9348 states and 41961 transitions. [2021-06-12 20:46:13,442 INFO L78 Accepts]: Start accepts. Automaton has 9348 states and 41961 transitions. Word has length 33 [2021-06-12 20:46:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:13,442 INFO L482 AbstractCegarLoop]: Abstraction has 9348 states and 41961 transitions. [2021-06-12 20:46:13,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9348 states and 41961 transitions. [2021-06-12 20:46:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:13,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:13,537 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:13,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:13,738 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:13,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1285643380, now seen corresponding path program 18 times [2021-06-12 20:46:13,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:13,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298759693] [2021-06-12 20:46:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:13,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298759693] [2021-06-12 20:46:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298759693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987170895] [2021-06-12 20:46:13,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:13,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:46:13,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:14,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:14,106 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:46:14,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 59 [2021-06-12 20:46:14,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:14,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:14,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:14,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:51 [2021-06-12 20:46:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:14,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987170895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:14,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:14,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:46:14,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332446447] [2021-06-12 20:46:14,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:46:14,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:46:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:46:14,302 INFO L87 Difference]: Start difference. First operand 9348 states and 41961 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:16,089 INFO L93 Difference]: Finished difference Result 10309 states and 45814 transitions. [2021-06-12 20:46:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:46:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:16,113 INFO L225 Difference]: With dead ends: 10309 [2021-06-12 20:46:16,113 INFO L226 Difference]: Without dead ends: 10294 [2021-06-12 20:46:16,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1181.5ms TimeCoverageRelationStatistics Valid=293, Invalid=2677, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:46:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-06-12 20:46:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 9372. [2021-06-12 20:46:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9372 states, 9371 states have (on average 4.489488848575392) internal successors, (42071), 9371 states have internal predecessors, (42071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9372 states to 9372 states and 42071 transitions. [2021-06-12 20:46:16,275 INFO L78 Accepts]: Start accepts. Automaton has 9372 states and 42071 transitions. Word has length 33 [2021-06-12 20:46:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:16,275 INFO L482 AbstractCegarLoop]: Abstraction has 9372 states and 42071 transitions. [2021-06-12 20:46:16,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9372 states and 42071 transitions. [2021-06-12 20:46:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:16,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:16,291 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:16,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:16,492 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1474484946, now seen corresponding path program 19 times [2021-06-12 20:46:16,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:16,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517536671] [2021-06-12 20:46:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:16,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517536671] [2021-06-12 20:46:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517536671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842898917] [2021-06-12 20:46:16,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:16,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:16,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:16,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:16,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:16,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:16,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:46:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:16,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842898917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:16,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:16,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205091580] [2021-06-12 20:46:16,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:16,950 INFO L87 Difference]: Start difference. First operand 9372 states and 42071 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:18,130 INFO L93 Difference]: Finished difference Result 10743 states and 47476 transitions. [2021-06-12 20:46:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:46:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:18,156 INFO L225 Difference]: With dead ends: 10743 [2021-06-12 20:46:18,157 INFO L226 Difference]: Without dead ends: 10728 [2021-06-12 20:46:18,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 802.7ms TimeCoverageRelationStatistics Valid=327, Invalid=1835, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:46:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2021-06-12 20:46:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 9421. [2021-06-12 20:46:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9421 states, 9420 states have (on average 4.489808917197452) internal successors, (42294), 9420 states have internal predecessors, (42294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9421 states to 9421 states and 42294 transitions. [2021-06-12 20:46:18,339 INFO L78 Accepts]: Start accepts. Automaton has 9421 states and 42294 transitions. Word has length 33 [2021-06-12 20:46:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:18,339 INFO L482 AbstractCegarLoop]: Abstraction has 9421 states and 42294 transitions. [2021-06-12 20:46:18,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 9421 states and 42294 transitions. [2021-06-12 20:46:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:18,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:18,355 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:18,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-12 20:46:18,555 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:18,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1152088908, now seen corresponding path program 20 times [2021-06-12 20:46:18,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:18,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181044634] [2021-06-12 20:46:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:18,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:18,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181044634] [2021-06-12 20:46:18,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181044634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:18,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86350519] [2021-06-12 20:46:18,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:18,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:18,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:46:18,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:18,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:18,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:18,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:46:18,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:18,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:18,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:18,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:37 [2021-06-12 20:46:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:19,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86350519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:19,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:19,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:19,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953263282] [2021-06-12 20:46:19,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:19,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:19,008 INFO L87 Difference]: Start difference. First operand 9421 states and 42294 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:20,495 INFO L93 Difference]: Finished difference Result 10566 states and 46821 transitions. [2021-06-12 20:46:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:46:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:20,519 INFO L225 Difference]: With dead ends: 10566 [2021-06-12 20:46:20,520 INFO L226 Difference]: Without dead ends: 10531 [2021-06-12 20:46:20,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1152.9ms TimeCoverageRelationStatistics Valid=422, Invalid=2440, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:46:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10531 states. [2021-06-12 20:46:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10531 to 9348. [2021-06-12 20:46:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9348 states, 9347 states have (on average 4.489247887022574) internal successors, (41961), 9347 states have internal predecessors, (41961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9348 states to 9348 states and 41961 transitions. [2021-06-12 20:46:20,691 INFO L78 Accepts]: Start accepts. Automaton has 9348 states and 41961 transitions. Word has length 33 [2021-06-12 20:46:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:20,692 INFO L482 AbstractCegarLoop]: Abstraction has 9348 states and 41961 transitions. [2021-06-12 20:46:20,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 9348 states and 41961 transitions. [2021-06-12 20:46:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:20,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:20,707 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:20,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:20,908 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:20,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1142951876, now seen corresponding path program 21 times [2021-06-12 20:46:20,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:20,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745507249] [2021-06-12 20:46:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:21,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:21,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745507249] [2021-06-12 20:46:21,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745507249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:21,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763073849] [2021-06-12 20:46:21,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:21,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:46:21,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:21,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:21,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:46:21,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:21,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:21,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:21,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-12 20:46:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:21,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763073849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:21,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:21,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:21,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205483224] [2021-06-12 20:46:21,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:21,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:21,400 INFO L87 Difference]: Start difference. First operand 9348 states and 41961 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:22,116 INFO L93 Difference]: Finished difference Result 10213 states and 45490 transitions. [2021-06-12 20:46:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:46:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:22,139 INFO L225 Difference]: With dead ends: 10213 [2021-06-12 20:46:22,140 INFO L226 Difference]: Without dead ends: 10198 [2021-06-12 20:46:22,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:46:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-06-12 20:46:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 9324. [2021-06-12 20:46:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9324 states, 9323 states have (on average 4.488147591976832) internal successors, (41843), 9323 states have internal predecessors, (41843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9324 states to 9324 states and 41843 transitions. [2021-06-12 20:46:22,300 INFO L78 Accepts]: Start accepts. Automaton has 9324 states and 41843 transitions. Word has length 33 [2021-06-12 20:46:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:22,300 INFO L482 AbstractCegarLoop]: Abstraction has 9324 states and 41843 transitions. [2021-06-12 20:46:22,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 9324 states and 41843 transitions. [2021-06-12 20:46:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:22,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:22,315 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-12 20:46:22,516 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1016783730, now seen corresponding path program 22 times [2021-06-12 20:46:22,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:22,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360964412] [2021-06-12 20:46:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:22,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360964412] [2021-06-12 20:46:22,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360964412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640170965] [2021-06-12 20:46:22,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:22,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:22,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:22,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:22,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:22,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:22,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:22,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:22,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:46:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:22,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640170965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:22,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:22,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:22,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502101131] [2021-06-12 20:46:22,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:22,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:22,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:22,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:22,995 INFO L87 Difference]: Start difference. First operand 9324 states and 41843 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:24,339 INFO L93 Difference]: Finished difference Result 10218 states and 45535 transitions. [2021-06-12 20:46:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:46:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:24,362 INFO L225 Difference]: With dead ends: 10218 [2021-06-12 20:46:24,362 INFO L226 Difference]: Without dead ends: 10203 [2021-06-12 20:46:24,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1048.5ms TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:46:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2021-06-12 20:46:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 9324. [2021-06-12 20:46:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9324 states, 9323 states have (on average 4.488147591976832) internal successors, (41843), 9323 states have internal predecessors, (41843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9324 states to 9324 states and 41843 transitions. [2021-06-12 20:46:24,517 INFO L78 Accepts]: Start accepts. Automaton has 9324 states and 41843 transitions. Word has length 33 [2021-06-12 20:46:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:24,517 INFO L482 AbstractCegarLoop]: Abstraction has 9324 states and 41843 transitions. [2021-06-12 20:46:24,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9324 states and 41843 transitions. [2021-06-12 20:46:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:24,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:24,532 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:24,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:24,732 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash 663644240, now seen corresponding path program 23 times [2021-06-12 20:46:24,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:24,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351238320] [2021-06-12 20:46:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:24,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351238320] [2021-06-12 20:46:24,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351238320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058520016] [2021-06-12 20:46:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:24,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:46:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:25,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:25,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:46:25,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:25,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:25,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:25,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:46:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058520016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:25,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:25,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:25,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002943872] [2021-06-12 20:46:25,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:25,134 INFO L87 Difference]: Start difference. First operand 9324 states and 41843 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:26,530 INFO L93 Difference]: Finished difference Result 10684 states and 47362 transitions. [2021-06-12 20:46:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:46:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:26,555 INFO L225 Difference]: With dead ends: 10684 [2021-06-12 20:46:26,555 INFO L226 Difference]: Without dead ends: 10669 [2021-06-12 20:46:26,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=381, Invalid=1971, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:46:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2021-06-12 20:46:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 9406. [2021-06-12 20:46:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9406 states, 9405 states have (on average 4.488888888888889) internal successors, (42218), 9405 states have internal predecessors, (42218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9406 states to 9406 states and 42218 transitions. [2021-06-12 20:46:26,725 INFO L78 Accepts]: Start accepts. Automaton has 9406 states and 42218 transitions. Word has length 33 [2021-06-12 20:46:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:26,725 INFO L482 AbstractCegarLoop]: Abstraction has 9406 states and 42218 transitions. [2021-06-12 20:46:26,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9406 states and 42218 transitions. [2021-06-12 20:46:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:26,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:26,741 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:26,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:26,941 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1193590768, now seen corresponding path program 24 times [2021-06-12 20:46:26,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:26,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192091633] [2021-06-12 20:46:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:27,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192091633] [2021-06-12 20:46:27,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192091633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631118992] [2021-06-12 20:46:27,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:27,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:46:27,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:27,285 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:46:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:46:27,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:27,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:27,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:27,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:46:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:27,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631118992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:27,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:27,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:27,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050228469] [2021-06-12 20:46:27,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:27,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:27,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:27,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:27,478 INFO L87 Difference]: Start difference. First operand 9406 states and 42218 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:29,157 INFO L93 Difference]: Finished difference Result 10048 states and 44824 transitions. [2021-06-12 20:46:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:46:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:29,179 INFO L225 Difference]: With dead ends: 10048 [2021-06-12 20:46:29,179 INFO L226 Difference]: Without dead ends: 10034 [2021-06-12 20:46:29,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1298.3ms TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:46:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10034 states. [2021-06-12 20:46:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10034 to 9403. [2021-06-12 20:46:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9403 states, 9402 states have (on average 4.489257604764943) internal successors, (42208), 9402 states have internal predecessors, (42208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9403 states to 9403 states and 42208 transitions. [2021-06-12 20:46:29,328 INFO L78 Accepts]: Start accepts. Automaton has 9403 states and 42208 transitions. Word has length 33 [2021-06-12 20:46:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:29,328 INFO L482 AbstractCegarLoop]: Abstraction has 9403 states and 42208 transitions. [2021-06-12 20:46:29,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 9403 states and 42208 transitions. [2021-06-12 20:46:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:29,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:29,344 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:29,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:29,544 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash 918837862, now seen corresponding path program 25 times [2021-06-12 20:46:29,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:29,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97325904] [2021-06-12 20:46:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:29,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97325904] [2021-06-12 20:46:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97325904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662582322] [2021-06-12 20:46:29,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:29,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:29,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:29,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:46:29,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:29,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:29,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:29,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:46:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:29,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662582322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:29,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:29,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:46:29,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821387803] [2021-06-12 20:46:29,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:29,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:29,927 INFO L87 Difference]: Start difference. First operand 9403 states and 42208 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:30,898 INFO L93 Difference]: Finished difference Result 10535 states and 46739 transitions. [2021-06-12 20:46:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:46:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:30,922 INFO L225 Difference]: With dead ends: 10535 [2021-06-12 20:46:30,922 INFO L226 Difference]: Without dead ends: 10500 [2021-06-12 20:46:30,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 766.8ms TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:46:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10500 states. [2021-06-12 20:46:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10500 to 9333. [2021-06-12 20:46:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9333 states, 9332 states have (on average 4.48831975996571) internal successors, (41885), 9332 states have internal predecessors, (41885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9333 states to 9333 states and 41885 transitions. [2021-06-12 20:46:31,087 INFO L78 Accepts]: Start accepts. Automaton has 9333 states and 41885 transitions. Word has length 33 [2021-06-12 20:46:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:31,087 INFO L482 AbstractCegarLoop]: Abstraction has 9333 states and 41885 transitions. [2021-06-12 20:46:31,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9333 states and 41885 transitions. [2021-06-12 20:46:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:31,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:31,103 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:31,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-12 20:46:31,303 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash -549823670, now seen corresponding path program 26 times [2021-06-12 20:46:31,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:31,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798860311] [2021-06-12 20:46:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:31,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:31,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798860311] [2021-06-12 20:46:31,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798860311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:31,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407913284] [2021-06-12 20:46:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:31,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:31,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:46:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:31,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:31,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:46:31,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:31,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:31,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:31,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-12 20:46:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:31,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407913284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:31,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:31,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:46:31,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117171802] [2021-06-12 20:46:31,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:46:31,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:46:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:46:31,806 INFO L87 Difference]: Start difference. First operand 9333 states and 41885 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:34,050 INFO L93 Difference]: Finished difference Result 10608 states and 47075 transitions. [2021-06-12 20:46:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:46:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:34,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:34,075 INFO L225 Difference]: With dead ends: 10608 [2021-06-12 20:46:34,075 INFO L226 Difference]: Without dead ends: 10593 [2021-06-12 20:46:34,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1862.4ms TimeCoverageRelationStatistics Valid=554, Invalid=3352, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:46:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-06-12 20:46:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 9394. [2021-06-12 20:46:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9394 states, 9393 states have (on average 4.490045778771425) internal successors, (42175), 9393 states have internal predecessors, (42175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9394 states to 9394 states and 42175 transitions. [2021-06-12 20:46:34,239 INFO L78 Accepts]: Start accepts. Automaton has 9394 states and 42175 transitions. Word has length 33 [2021-06-12 20:46:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:34,240 INFO L482 AbstractCegarLoop]: Abstraction has 9394 states and 42175 transitions. [2021-06-12 20:46:34,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 9394 states and 42175 transitions. [2021-06-12 20:46:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:34,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:34,255 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:34,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:34,456 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash -738665236, now seen corresponding path program 27 times [2021-06-12 20:46:34,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:34,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513002289] [2021-06-12 20:46:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:34,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:34,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513002289] [2021-06-12 20:46:34,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513002289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:34,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732224218] [2021-06-12 20:46:34,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:34,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:34,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:34,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:34,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:46:34,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:34,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:34,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:34,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:46:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:34,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732224218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:34,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:34,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:34,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835361546] [2021-06-12 20:46:34,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:34,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:34,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:34,939 INFO L87 Difference]: Start difference. First operand 9394 states and 42175 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:36,152 INFO L93 Difference]: Finished difference Result 10157 states and 45135 transitions. [2021-06-12 20:46:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:46:36,153 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:36,176 INFO L225 Difference]: With dead ends: 10157 [2021-06-12 20:46:36,176 INFO L226 Difference]: Without dead ends: 10148 [2021-06-12 20:46:36,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1057.3ms TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:46:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-06-12 20:46:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9394. [2021-06-12 20:46:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9394 states, 9393 states have (on average 4.490045778771425) internal successors, (42175), 9393 states have internal predecessors, (42175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9394 states to 9394 states and 42175 transitions. [2021-06-12 20:46:36,344 INFO L78 Accepts]: Start accepts. Automaton has 9394 states and 42175 transitions. Word has length 33 [2021-06-12 20:46:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:36,344 INFO L482 AbstractCegarLoop]: Abstraction has 9394 states and 42175 transitions. [2021-06-12 20:46:36,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 9394 states and 42175 transitions. [2021-06-12 20:46:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:36,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:36,360 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:36,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:36,560 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1887908618, now seen corresponding path program 28 times [2021-06-12 20:46:36,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:36,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983853639] [2021-06-12 20:46:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:36,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:36,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983853639] [2021-06-12 20:46:36,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983853639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:36,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029059370] [2021-06-12 20:46:36,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:36,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:36,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:36,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:36,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:36,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:36,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:36,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:46:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:36,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029059370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:36,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:36,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:46:36,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821599560] [2021-06-12 20:46:36,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:36,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:36,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:36,946 INFO L87 Difference]: Start difference. First operand 9394 states and 42175 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:38,131 INFO L93 Difference]: Finished difference Result 10671 states and 47189 transitions. [2021-06-12 20:46:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:46:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:38,162 INFO L225 Difference]: With dead ends: 10671 [2021-06-12 20:46:38,162 INFO L226 Difference]: Without dead ends: 10648 [2021-06-12 20:46:38,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 858.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:46:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2021-06-12 20:46:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 9410. [2021-06-12 20:46:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9410 states, 9409 states have (on average 4.4880433627378045) internal successors, (42228), 9409 states have internal predecessors, (42228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9410 states to 9410 states and 42228 transitions. [2021-06-12 20:46:38,393 INFO L78 Accepts]: Start accepts. Automaton has 9410 states and 42228 transitions. Word has length 33 [2021-06-12 20:46:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:38,394 INFO L482 AbstractCegarLoop]: Abstraction has 9410 states and 42228 transitions. [2021-06-12 20:46:38,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9410 states and 42228 transitions. [2021-06-12 20:46:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:38,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:38,409 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:38,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable472 [2021-06-12 20:46:38,609 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1996840442, now seen corresponding path program 29 times [2021-06-12 20:46:38,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:38,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388657847] [2021-06-12 20:46:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:38,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388657847] [2021-06-12 20:46:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388657847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705304971] [2021-06-12 20:46:38,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:38,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:46:38,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:38,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:38,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:38,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:38,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:38,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:38,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:46:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:38,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705304971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:38,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:38,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:38,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256955787] [2021-06-12 20:46:38,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:38,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:38,997 INFO L87 Difference]: Start difference. First operand 9410 states and 42228 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:40,032 INFO L93 Difference]: Finished difference Result 10624 states and 47059 transitions. [2021-06-12 20:46:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:46:40,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:40,057 INFO L225 Difference]: With dead ends: 10624 [2021-06-12 20:46:40,057 INFO L226 Difference]: Without dead ends: 10602 [2021-06-12 20:46:40,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 822.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:46:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10602 states. [2021-06-12 20:46:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10602 to 9354. [2021-06-12 20:46:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9354 states, 9353 states have (on average 4.488613279161767) internal successors, (41982), 9353 states have internal predecessors, (41982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9354 states to 9354 states and 41982 transitions. [2021-06-12 20:46:40,235 INFO L78 Accepts]: Start accepts. Automaton has 9354 states and 41982 transitions. Word has length 33 [2021-06-12 20:46:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:40,235 INFO L482 AbstractCegarLoop]: Abstraction has 9354 states and 41982 transitions. [2021-06-12 20:46:40,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9354 states and 41982 transitions. [2021-06-12 20:46:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:40,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:40,250 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:40,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:40,451 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1045610378, now seen corresponding path program 30 times [2021-06-12 20:46:40,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:40,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759017094] [2021-06-12 20:46:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:40,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:40,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759017094] [2021-06-12 20:46:40,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759017094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:40,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307980436] [2021-06-12 20:46:40,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:40,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:40,811 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:46:40,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:46:40,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:40,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:40,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:40,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-12 20:46:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:40,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307980436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:40,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:40,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:40,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819019990] [2021-06-12 20:46:40,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:40,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:40,994 INFO L87 Difference]: Start difference. First operand 9354 states and 41982 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:42,454 INFO L93 Difference]: Finished difference Result 9986 states and 44539 transitions. [2021-06-12 20:46:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:46:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:42,477 INFO L225 Difference]: With dead ends: 9986 [2021-06-12 20:46:42,477 INFO L226 Difference]: Without dead ends: 9967 [2021-06-12 20:46:42,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1117.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:46:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9967 states. [2021-06-12 20:46:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9967 to 9342. [2021-06-12 20:46:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9342 states, 9341 states have (on average 4.489455090461407) internal successors, (41936), 9341 states have internal predecessors, (41936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 41936 transitions. [2021-06-12 20:46:42,632 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 41936 transitions. Word has length 33 [2021-06-12 20:46:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:42,632 INFO L482 AbstractCegarLoop]: Abstraction has 9342 states and 41936 transitions. [2021-06-12 20:46:42,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 41936 transitions. [2021-06-12 20:46:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:42,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:42,648 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:42,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:42,848 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1656499226, now seen corresponding path program 31 times [2021-06-12 20:46:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:42,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374971547] [2021-06-12 20:46:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:43,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374971547] [2021-06-12 20:46:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374971547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32699396] [2021-06-12 20:46:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:43,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:46:43,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:43,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:43,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:43,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:46:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32699396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:43,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:43,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:43,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127657071] [2021-06-12 20:46:43,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:43,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:43,388 INFO L87 Difference]: Start difference. First operand 9342 states and 41936 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:44,472 INFO L93 Difference]: Finished difference Result 9781 states and 43721 transitions. [2021-06-12 20:46:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:46:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:44,495 INFO L225 Difference]: With dead ends: 9781 [2021-06-12 20:46:44,495 INFO L226 Difference]: Without dead ends: 9766 [2021-06-12 20:46:44,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:46:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9766 states. [2021-06-12 20:46:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9766 to 9375. [2021-06-12 20:46:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9375 states, 9374 states have (on average 4.4898655856624705) internal successors, (42088), 9374 states have internal predecessors, (42088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9375 states to 9375 states and 42088 transitions. [2021-06-12 20:46:44,707 INFO L78 Accepts]: Start accepts. Automaton has 9375 states and 42088 transitions. Word has length 33 [2021-06-12 20:46:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:44,707 INFO L482 AbstractCegarLoop]: Abstraction has 9375 states and 42088 transitions. [2021-06-12 20:46:44,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9375 states and 42088 transitions. [2021-06-12 20:46:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:44,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:44,722 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:44,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 20:46:44,923 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:44,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1591865720, now seen corresponding path program 32 times [2021-06-12 20:46:44,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:44,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577248190] [2021-06-12 20:46:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:45,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577248190] [2021-06-12 20:46:45,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577248190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891229616] [2021-06-12 20:46:45,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:45,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:46:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:45,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:46:45,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:45,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:45,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:45,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:39 [2021-06-12 20:46:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:45,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891229616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:45,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:45,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:45,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138067630] [2021-06-12 20:46:45,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:45,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:45,473 INFO L87 Difference]: Start difference. First operand 9375 states and 42088 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:46,081 INFO L93 Difference]: Finished difference Result 9709 states and 43337 transitions. [2021-06-12 20:46:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:46:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:46,103 INFO L225 Difference]: With dead ends: 9709 [2021-06-12 20:46:46,103 INFO L226 Difference]: Without dead ends: 9694 [2021-06-12 20:46:46,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:46:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9694 states. [2021-06-12 20:46:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9694 to 9378. [2021-06-12 20:46:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9378 states, 9377 states have (on average 4.489602218193452) internal successors, (42099), 9377 states have internal predecessors, (42099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9378 states to 9378 states and 42099 transitions. [2021-06-12 20:46:46,259 INFO L78 Accepts]: Start accepts. Automaton has 9378 states and 42099 transitions. Word has length 33 [2021-06-12 20:46:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:46,259 INFO L482 AbstractCegarLoop]: Abstraction has 9378 states and 42099 transitions. [2021-06-12 20:46:46,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9378 states and 42099 transitions. [2021-06-12 20:46:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:46,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:46,275 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:46,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:46,475 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2025895066, now seen corresponding path program 33 times [2021-06-12 20:46:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:46,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160044395] [2021-06-12 20:46:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:46,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:46,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160044395] [2021-06-12 20:46:46,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160044395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:46,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229625910] [2021-06-12 20:46:46,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:46,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:46,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:46,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:46:46,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:46,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:46:46,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:46,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:46,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:46,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:30 [2021-06-12 20:46:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:46,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229625910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:46,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:46,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:46,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547923508] [2021-06-12 20:46:46,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:46,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:46,992 INFO L87 Difference]: Start difference. First operand 9378 states and 42099 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:47,716 INFO L93 Difference]: Finished difference Result 9695 states and 43311 transitions. [2021-06-12 20:46:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:46:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:47,738 INFO L225 Difference]: With dead ends: 9695 [2021-06-12 20:46:47,739 INFO L226 Difference]: Without dead ends: 9680 [2021-06-12 20:46:47,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 580.2ms TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:46:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9680 states. [2021-06-12 20:46:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9680 to 9378. [2021-06-12 20:46:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9378 states, 9377 states have (on average 4.489602218193452) internal successors, (42099), 9377 states have internal predecessors, (42099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9378 states to 9378 states and 42099 transitions. [2021-06-12 20:46:47,893 INFO L78 Accepts]: Start accepts. Automaton has 9378 states and 42099 transitions. Word has length 33 [2021-06-12 20:46:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:47,893 INFO L482 AbstractCegarLoop]: Abstraction has 9378 states and 42099 transitions. [2021-06-12 20:46:47,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9378 states and 42099 transitions. [2021-06-12 20:46:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:47,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:47,910 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:48,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:48,110 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:48,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1672755576, now seen corresponding path program 34 times [2021-06-12 20:46:48,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:48,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935752161] [2021-06-12 20:46:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:48,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:48,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935752161] [2021-06-12 20:46:48,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935752161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:48,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139744943] [2021-06-12 20:46:48,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:48,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:48,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:48,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:48,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:46:48,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:48,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:48,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:48,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-06-12 20:46:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:48,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139744943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:48,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:48,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:48,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183059460] [2021-06-12 20:46:48,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:48,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:48,533 INFO L87 Difference]: Start difference. First operand 9378 states and 42099 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:49,613 INFO L93 Difference]: Finished difference Result 10568 states and 46841 transitions. [2021-06-12 20:46:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:46:49,613 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:49,638 INFO L225 Difference]: With dead ends: 10568 [2021-06-12 20:46:49,638 INFO L226 Difference]: Without dead ends: 10553 [2021-06-12 20:46:49,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 729.7ms TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:46:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10553 states. [2021-06-12 20:46:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10553 to 9472. [2021-06-12 20:46:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9472 states, 9471 states have (on average 4.49150036954915) internal successors, (42539), 9471 states have internal predecessors, (42539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 42539 transitions. [2021-06-12 20:46:49,823 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 42539 transitions. Word has length 33 [2021-06-12 20:46:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:49,823 INFO L482 AbstractCegarLoop]: Abstraction has 9472 states and 42539 transitions. [2021-06-12 20:46:49,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 42539 transitions. [2021-06-12 20:46:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:49,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:49,839 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:50,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:50,040 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash -184479432, now seen corresponding path program 35 times [2021-06-12 20:46:50,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:50,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155848593] [2021-06-12 20:46:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:50,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155848593] [2021-06-12 20:46:50,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155848593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429275558] [2021-06-12 20:46:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:50,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:46:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:46:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:50,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:50,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:50,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:50,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:50,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:46:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:50,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429275558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:50,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:50,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:50,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160308471] [2021-06-12 20:46:50,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:50,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:50,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:50,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:50,541 INFO L87 Difference]: Start difference. First operand 9472 states and 42539 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:51,534 INFO L93 Difference]: Finished difference Result 10384 states and 46104 transitions. [2021-06-12 20:46:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:46:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:51,558 INFO L225 Difference]: With dead ends: 10384 [2021-06-12 20:46:51,558 INFO L226 Difference]: Without dead ends: 10349 [2021-06-12 20:46:51,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:46:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2021-06-12 20:46:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 9420. [2021-06-12 20:46:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9420 states, 9419 states have (on average 4.491559613547086) internal successors, (42306), 9419 states have internal predecessors, (42306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 42306 transitions. [2021-06-12 20:46:51,733 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 42306 transitions. Word has length 33 [2021-06-12 20:46:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:51,733 INFO L482 AbstractCegarLoop]: Abstraction has 9420 states and 42306 transitions. [2021-06-12 20:46:51,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 42306 transitions. [2021-06-12 20:46:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:51,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:51,749 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:51,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:51,949 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash 116248142, now seen corresponding path program 36 times [2021-06-12 20:46:51,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:51,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840442564] [2021-06-12 20:46:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:52,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:52,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840442564] [2021-06-12 20:46:52,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840442564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:52,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215451203] [2021-06-12 20:46:52,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:52,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:52,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:52,403 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:46:52,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:46:52,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:46:52,426 INFO L628 ElimStorePlain]: treesize reduction 89, result has 18.3 percent of original size [2021-06-12 20:46:52,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:52,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-06-12 20:46:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:52,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215451203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:52,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:52,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:46:52,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361056066] [2021-06-12 20:46:52,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:46:52,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:46:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:46:52,522 INFO L87 Difference]: Start difference. First operand 9420 states and 42306 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:53,770 INFO L93 Difference]: Finished difference Result 9873 states and 44007 transitions. [2021-06-12 20:46:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:46:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:53,792 INFO L225 Difference]: With dead ends: 9873 [2021-06-12 20:46:53,792 INFO L226 Difference]: Without dead ends: 9858 [2021-06-12 20:46:53,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:46:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2021-06-12 20:46:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 9420. [2021-06-12 20:46:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9420 states, 9419 states have (on average 4.491559613547086) internal successors, (42306), 9419 states have internal predecessors, (42306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 42306 transitions. [2021-06-12 20:46:53,943 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 42306 transitions. Word has length 33 [2021-06-12 20:46:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:53,943 INFO L482 AbstractCegarLoop]: Abstraction has 9420 states and 42306 transitions. [2021-06-12 20:46:53,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 42306 transitions. [2021-06-12 20:46:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:53,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:53,958 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:54,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-12 20:46:54,159 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash 550277488, now seen corresponding path program 37 times [2021-06-12 20:46:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:54,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079308105] [2021-06-12 20:46:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:54,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:54,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079308105] [2021-06-12 20:46:54,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079308105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:54,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639955881] [2021-06-12 20:46:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:54,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:54,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:54,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:54,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:54,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:46:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:54,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639955881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:54,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:54,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:54,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950954930] [2021-06-12 20:46:54,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:54,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:54,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:54,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:54,568 INFO L87 Difference]: Start difference. First operand 9420 states and 42306 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:56,079 INFO L93 Difference]: Finished difference Result 10104 states and 45013 transitions. [2021-06-12 20:46:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:46:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:56,102 INFO L225 Difference]: With dead ends: 10104 [2021-06-12 20:46:56,102 INFO L226 Difference]: Without dead ends: 10089 [2021-06-12 20:46:56,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 936.4ms TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:46:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2021-06-12 20:46:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 9351. [2021-06-12 20:46:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9351 states, 9350 states have (on average 4.4896256684491975) internal successors, (41978), 9350 states have internal predecessors, (41978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9351 states to 9351 states and 41978 transitions. [2021-06-12 20:46:56,321 INFO L78 Accepts]: Start accepts. Automaton has 9351 states and 41978 transitions. Word has length 33 [2021-06-12 20:46:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:56,321 INFO L482 AbstractCegarLoop]: Abstraction has 9351 states and 41978 transitions. [2021-06-12 20:46:56,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 9351 states and 41978 transitions. [2021-06-12 20:46:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:56,336 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:56,336 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:56,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:56,537 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash -614658574, now seen corresponding path program 38 times [2021-06-12 20:46:56,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:56,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353180230] [2021-06-12 20:46:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:56,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353180230] [2021-06-12 20:46:56,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353180230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276859189] [2021-06-12 20:46:56,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:56,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:56,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:56,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:46:56,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:56,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:56,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:56,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:46:56,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:56,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:56,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:56,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:51 [2021-06-12 20:46:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:57,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276859189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:57,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:57,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:57,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535624520] [2021-06-12 20:46:57,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:57,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:57,088 INFO L87 Difference]: Start difference. First operand 9351 states and 41978 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:58,029 INFO L93 Difference]: Finished difference Result 10115 states and 45057 transitions. [2021-06-12 20:46:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:46:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:58,051 INFO L225 Difference]: With dead ends: 10115 [2021-06-12 20:46:58,051 INFO L226 Difference]: Without dead ends: 10085 [2021-06-12 20:46:58,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 738.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:46:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10085 states. [2021-06-12 20:46:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10085 to 9396. [2021-06-12 20:46:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9396 states, 9395 states have (on average 4.491325172964343) internal successors, (42196), 9395 states have internal predecessors, (42196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 42196 transitions. [2021-06-12 20:46:58,209 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 42196 transitions. Word has length 33 [2021-06-12 20:46:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:58,209 INFO L482 AbstractCegarLoop]: Abstraction has 9396 states and 42196 transitions. [2021-06-12 20:46:58,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 42196 transitions. [2021-06-12 20:46:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:46:58,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:58,227 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:58,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-12 20:46:58,427 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:58,427 INFO L82 PathProgramCache]: Analyzing trace with hash -180629228, now seen corresponding path program 39 times [2021-06-12 20:46:58,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:58,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983057520] [2021-06-12 20:46:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:58,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983057520] [2021-06-12 20:46:58,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983057520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970273218] [2021-06-12 20:46:58,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:58,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:58,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:58,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:46:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:58,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:58,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:46:58,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:58,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:58,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:58,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:35 [2021-06-12 20:46:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:58,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970273218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:58,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:58,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:58,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892254852] [2021-06-12 20:46:58,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:46:58,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:58,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:46:58,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:58,956 INFO L87 Difference]: Start difference. First operand 9396 states and 42196 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:59,976 INFO L93 Difference]: Finished difference Result 9916 states and 44276 transitions. [2021-06-12 20:46:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:46:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:46:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:59,999 INFO L225 Difference]: With dead ends: 9916 [2021-06-12 20:47:00,000 INFO L226 Difference]: Without dead ends: 9901 [2021-06-12 20:47:00,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:47:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9901 states. [2021-06-12 20:47:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9901 to 9396. [2021-06-12 20:47:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9396 states, 9395 states have (on average 4.491325172964343) internal successors, (42196), 9395 states have internal predecessors, (42196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 42196 transitions. [2021-06-12 20:47:00,178 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 42196 transitions. Word has length 33 [2021-06-12 20:47:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:00,178 INFO L482 AbstractCegarLoop]: Abstraction has 9396 states and 42196 transitions. [2021-06-12 20:47:00,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 42196 transitions. [2021-06-12 20:47:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:00,195 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:00,195 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:00,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:00,395 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash -533768718, now seen corresponding path program 40 times [2021-06-12 20:47:00,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:00,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996157962] [2021-06-12 20:47:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:00,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:00,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996157962] [2021-06-12 20:47:00,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996157962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:00,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000715782] [2021-06-12 20:47:00,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:00,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:00,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:00,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:00,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:00,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:00,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:47:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:00,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000715782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:00,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:00,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:00,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689328047] [2021-06-12 20:47:00,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:00,871 INFO L87 Difference]: Start difference. First operand 9396 states and 42196 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:02,315 INFO L93 Difference]: Finished difference Result 10826 states and 47851 transitions. [2021-06-12 20:47:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:47:02,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:02,341 INFO L225 Difference]: With dead ends: 10826 [2021-06-12 20:47:02,341 INFO L226 Difference]: Without dead ends: 10796 [2021-06-12 20:47:02,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1023.0ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:47:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10796 states. [2021-06-12 20:47:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10796 to 9505. [2021-06-12 20:47:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9505 states, 9504 states have (on average 4.493055555555555) internal successors, (42702), 9504 states have internal predecessors, (42702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9505 states to 9505 states and 42702 transitions. [2021-06-12 20:47:02,578 INFO L78 Accepts]: Start accepts. Automaton has 9505 states and 42702 transitions. Word has length 33 [2021-06-12 20:47:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:02,578 INFO L482 AbstractCegarLoop]: Abstraction has 9505 states and 42702 transitions. [2021-06-12 20:47:02,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 9505 states and 42702 transitions. [2021-06-12 20:47:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:02,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:02,593 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:02,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:02,794 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1903963570, now seen corresponding path program 41 times [2021-06-12 20:47:02,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:02,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153684859] [2021-06-12 20:47:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:02,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:02,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153684859] [2021-06-12 20:47:02,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153684859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:02,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200249245] [2021-06-12 20:47:02,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:02,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:47:02,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:47:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:03,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:03,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:03,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:03,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:03,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:03,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:10 [2021-06-12 20:47:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:03,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200249245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:03,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:03,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:47:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360558261] [2021-06-12 20:47:03,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:03,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:03,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:03,229 INFO L87 Difference]: Start difference. First operand 9505 states and 42702 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:04,092 INFO L93 Difference]: Finished difference Result 10194 states and 45326 transitions. [2021-06-12 20:47:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:47:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:04,114 INFO L225 Difference]: With dead ends: 10194 [2021-06-12 20:47:04,114 INFO L226 Difference]: Without dead ends: 10170 [2021-06-12 20:47:04,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 694.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:47:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-12 20:47:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9499. [2021-06-12 20:47:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9499 states, 9498 states have (on average 4.4936828806064435) internal successors, (42681), 9498 states have internal predecessors, (42681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 42681 transitions. [2021-06-12 20:47:04,275 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 42681 transitions. Word has length 33 [2021-06-12 20:47:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:04,275 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 42681 transitions. [2021-06-12 20:47:04,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 42681 transitions. [2021-06-12 20:47:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:04,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:04,292 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:04,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-12 20:47:04,492 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:04,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1092304480, now seen corresponding path program 42 times [2021-06-12 20:47:04,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:04,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105691895] [2021-06-12 20:47:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:04,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:04,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105691895] [2021-06-12 20:47:04,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105691895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:04,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616774822] [2021-06-12 20:47:04,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:04,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:47:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:04,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:04,886 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:47:04,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 59 [2021-06-12 20:47:04,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:04,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:04,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:04,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:56 [2021-06-12 20:47:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:05,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616774822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:05,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:05,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:47:05,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636146740] [2021-06-12 20:47:05,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:47:05,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:05,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:47:05,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:47:05,098 INFO L87 Difference]: Start difference. First operand 9499 states and 42681 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:06,535 INFO L93 Difference]: Finished difference Result 10168 states and 45276 transitions. [2021-06-12 20:47:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:47:06,536 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:06,558 INFO L225 Difference]: With dead ends: 10168 [2021-06-12 20:47:06,559 INFO L226 Difference]: Without dead ends: 10138 [2021-06-12 20:47:06,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1156.7ms TimeCoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:47:06,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2021-06-12 20:47:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 9502. [2021-06-12 20:47:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 4.493316493000736) internal successors, (42691), 9501 states have internal predecessors, (42691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 42691 transitions. [2021-06-12 20:47:06,720 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 42691 transitions. Word has length 33 [2021-06-12 20:47:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:06,720 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 42691 transitions. [2021-06-12 20:47:06,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 42691 transitions. [2021-06-12 20:47:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:06,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:06,736 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:06,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:06,936 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1118070018, now seen corresponding path program 43 times [2021-06-12 20:47:06,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:06,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603500559] [2021-06-12 20:47:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:07,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:07,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603500559] [2021-06-12 20:47:07,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603500559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:07,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179210001] [2021-06-12 20:47:07,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:07,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:47:07,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:07,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:07,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:07,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-06-12 20:47:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:07,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179210001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:07,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:07,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:47:07,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958896258] [2021-06-12 20:47:07,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:07,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:07,345 INFO L87 Difference]: Start difference. First operand 9502 states and 42691 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:08,390 INFO L93 Difference]: Finished difference Result 10653 states and 47177 transitions. [2021-06-12 20:47:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:47:08,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:08,478 INFO L225 Difference]: With dead ends: 10653 [2021-06-12 20:47:08,478 INFO L226 Difference]: Without dead ends: 10608 [2021-06-12 20:47:08,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=304, Invalid=2048, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:47:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10608 states. [2021-06-12 20:47:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10608 to 9408. [2021-06-12 20:47:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9408 states, 9407 states have (on average 4.491442542787286) internal successors, (42251), 9407 states have internal predecessors, (42251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9408 states to 9408 states and 42251 transitions. [2021-06-12 20:47:08,638 INFO L78 Accepts]: Start accepts. Automaton has 9408 states and 42251 transitions. Word has length 33 [2021-06-12 20:47:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:08,639 INFO L482 AbstractCegarLoop]: Abstraction has 9408 states and 42251 transitions. [2021-06-12 20:47:08,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 9408 states and 42251 transitions. [2021-06-12 20:47:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:08,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:08,654 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:08,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-12 20:47:08,855 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:08,855 INFO L82 PathProgramCache]: Analyzing trace with hash -373894954, now seen corresponding path program 44 times [2021-06-12 20:47:08,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:08,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561583886] [2021-06-12 20:47:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:09,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:09,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561583886] [2021-06-12 20:47:09,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561583886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:09,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974501451] [2021-06-12 20:47:09,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:09,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:47:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:09,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:09,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:47:09,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:09,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:09,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:09,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 20:47:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:09,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974501451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:09,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:09,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:47:09,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72448422] [2021-06-12 20:47:09,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:09,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:09,361 INFO L87 Difference]: Start difference. First operand 9408 states and 42251 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:11,272 INFO L93 Difference]: Finished difference Result 10273 states and 45836 transitions. [2021-06-12 20:47:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:47:11,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:11,295 INFO L225 Difference]: With dead ends: 10273 [2021-06-12 20:47:11,296 INFO L226 Difference]: Without dead ends: 10243 [2021-06-12 20:47:11,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1559.9ms TimeCoverageRelationStatistics Valid=443, Invalid=2979, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:47:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-06-12 20:47:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9408. [2021-06-12 20:47:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9408 states, 9407 states have (on average 4.491442542787286) internal successors, (42251), 9407 states have internal predecessors, (42251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9408 states to 9408 states and 42251 transitions. [2021-06-12 20:47:11,511 INFO L78 Accepts]: Start accepts. Automaton has 9408 states and 42251 transitions. Word has length 33 [2021-06-12 20:47:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:11,511 INFO L482 AbstractCegarLoop]: Abstraction has 9408 states and 42251 transitions. [2021-06-12 20:47:11,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9408 states and 42251 transitions. [2021-06-12 20:47:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:11,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:11,526 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:11,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-12 20:47:11,727 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash -727034444, now seen corresponding path program 45 times [2021-06-12 20:47:11,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:11,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060207773] [2021-06-12 20:47:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:11,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:11,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060207773] [2021-06-12 20:47:11,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060207773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:11,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338082212] [2021-06-12 20:47:11,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:11,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:11,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:11,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:11,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:12,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:12,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:47:12,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:12,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:12,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:12,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:47:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338082212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:12,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:12,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:12,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374927106] [2021-06-12 20:47:12,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:47:12,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:47:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:12,236 INFO L87 Difference]: Start difference. First operand 9408 states and 42251 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:13,398 INFO L93 Difference]: Finished difference Result 9971 states and 44469 transitions. [2021-06-12 20:47:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:13,421 INFO L225 Difference]: With dead ends: 9971 [2021-06-12 20:47:13,421 INFO L226 Difference]: Without dead ends: 9956 [2021-06-12 20:47:13,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1086.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9956 states. [2021-06-12 20:47:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9956 to 9441. [2021-06-12 20:47:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9441 states, 9440 states have (on average 4.491843220338983) internal successors, (42403), 9440 states have internal predecessors, (42403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 42403 transitions. [2021-06-12 20:47:13,583 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 42403 transitions. Word has length 33 [2021-06-12 20:47:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:13,583 INFO L482 AbstractCegarLoop]: Abstraction has 9441 states and 42403 transitions. [2021-06-12 20:47:13,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 42403 transitions. [2021-06-12 20:47:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:13,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:13,598 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:13,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-12 20:47:13,799 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:13,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash -915876010, now seen corresponding path program 46 times [2021-06-12 20:47:13,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:13,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343552128] [2021-06-12 20:47:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:13,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:13,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343552128] [2021-06-12 20:47:13,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343552128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:13,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039833999] [2021-06-12 20:47:13,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:13,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:13,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:13,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:14,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:47:14,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:14,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:14,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:14,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:47:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:14,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039833999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:14,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:14,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:14,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196915045] [2021-06-12 20:47:14,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:14,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:14,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:14,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:14,193 INFO L87 Difference]: Start difference. First operand 9441 states and 42403 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:15,369 INFO L93 Difference]: Finished difference Result 10438 states and 46253 transitions. [2021-06-12 20:47:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:47:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:15,392 INFO L225 Difference]: With dead ends: 10438 [2021-06-12 20:47:15,392 INFO L226 Difference]: Without dead ends: 10414 [2021-06-12 20:47:15,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 963.8ms TimeCoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:47:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2021-06-12 20:47:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 9520. [2021-06-12 20:47:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9520 states, 9519 states have (on average 4.492908919004097) internal successors, (42768), 9519 states have internal predecessors, (42768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9520 states to 9520 states and 42768 transitions. [2021-06-12 20:47:15,562 INFO L78 Accepts]: Start accepts. Automaton has 9520 states and 42768 transitions. Word has length 33 [2021-06-12 20:47:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:15,562 INFO L482 AbstractCegarLoop]: Abstraction has 9520 states and 42768 transitions. [2021-06-12 20:47:15,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 9520 states and 42768 transitions. [2021-06-12 20:47:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:15,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:15,578 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:15,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:15,778 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1710697844, now seen corresponding path program 47 times [2021-06-12 20:47:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:15,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909009518] [2021-06-12 20:47:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:15,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909009518] [2021-06-12 20:47:15,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909009518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144166485] [2021-06-12 20:47:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:15,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:47:15,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:47:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:16,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:16,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 20:47:16,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:16,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:16,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:16,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:18 [2021-06-12 20:47:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:16,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144166485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:16,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:16,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:47:16,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379586655] [2021-06-12 20:47:16,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:16,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:16,190 INFO L87 Difference]: Start difference. First operand 9520 states and 42768 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:17,246 INFO L93 Difference]: Finished difference Result 10357 states and 46038 transitions. [2021-06-12 20:47:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:47:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:17,272 INFO L225 Difference]: With dead ends: 10357 [2021-06-12 20:47:17,272 INFO L226 Difference]: Without dead ends: 10308 [2021-06-12 20:47:17,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 880.0ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:47:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-06-12 20:47:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 9447. [2021-06-12 20:47:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 4.492377726021596) internal successors, (42435), 9446 states have internal predecessors, (42435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 42435 transitions. [2021-06-12 20:47:17,484 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 42435 transitions. Word has length 33 [2021-06-12 20:47:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:17,485 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 42435 transitions. [2021-06-12 20:47:17,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 42435 transitions. [2021-06-12 20:47:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:17,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:17,500 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:17,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:17,701 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:17,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1095791054, now seen corresponding path program 48 times [2021-06-12 20:47:17,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:17,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701616753] [2021-06-12 20:47:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:17,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701616753] [2021-06-12 20:47:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701616753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340032924] [2021-06-12 20:47:17,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:17,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:17,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:17,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:17,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:18,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:47:18,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:18,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:18,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:18,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:47:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:18,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340032924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:18,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:18,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:18,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079907040] [2021-06-12 20:47:18,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:47:18,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:18,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:47:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:18,216 INFO L87 Difference]: Start difference. First operand 9447 states and 42435 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:19,717 INFO L93 Difference]: Finished difference Result 10203 states and 45439 transitions. [2021-06-12 20:47:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:47:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:19,741 INFO L225 Difference]: With dead ends: 10203 [2021-06-12 20:47:19,741 INFO L226 Difference]: Without dead ends: 10188 [2021-06-12 20:47:19,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1277.2ms TimeCoverageRelationStatistics Valid=349, Invalid=1813, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:47:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2021-06-12 20:47:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 9508. [2021-06-12 20:47:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9508 states, 9507 states have (on average 4.4940570106237505) internal successors, (42725), 9507 states have internal predecessors, (42725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 42725 transitions. [2021-06-12 20:47:19,914 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 42725 transitions. Word has length 33 [2021-06-12 20:47:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:19,914 INFO L482 AbstractCegarLoop]: Abstraction has 9508 states and 42725 transitions. [2021-06-12 20:47:19,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 42725 transitions. [2021-06-12 20:47:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:19,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:19,930 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:20,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-12 20:47:20,131 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1284632620, now seen corresponding path program 49 times [2021-06-12 20:47:20,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:20,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703259275] [2021-06-12 20:47:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:20,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703259275] [2021-06-12 20:47:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703259275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935017701] [2021-06-12 20:47:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:20,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:20,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:47:20,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:20,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:20,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:20,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:47:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:20,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935017701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:20,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:20,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:20,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570310334] [2021-06-12 20:47:20,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:20,613 INFO L87 Difference]: Start difference. First operand 9508 states and 42725 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:21,841 INFO L93 Difference]: Finished difference Result 10667 states and 47196 transitions. [2021-06-12 20:47:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:47:21,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:21,868 INFO L225 Difference]: With dead ends: 10667 [2021-06-12 20:47:21,868 INFO L226 Difference]: Without dead ends: 10649 [2021-06-12 20:47:21,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1017.4ms TimeCoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:47:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10649 states. [2021-06-12 20:47:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10649 to 9581. [2021-06-12 20:47:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 4.494258872651357) internal successors, (43055), 9580 states have internal predecessors, (43055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 43055 transitions. [2021-06-12 20:47:22,060 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 43055 transitions. Word has length 33 [2021-06-12 20:47:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:22,060 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 43055 transitions. [2021-06-12 20:47:22,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 43055 transitions. [2021-06-12 20:47:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:22,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:22,076 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:22,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:22,276 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:22,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1341941234, now seen corresponding path program 50 times [2021-06-12 20:47:22,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:22,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118119060] [2021-06-12 20:47:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:22,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118119060] [2021-06-12 20:47:22,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118119060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:22,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145350424] [2021-06-12 20:47:22,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:22,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:22,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:47:22,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:22,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:47:22,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:22,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:22,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:22,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 20:47:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:22,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145350424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:22,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:22,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:47:22,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315110195] [2021-06-12 20:47:22,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:22,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:22,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:22,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:22,742 INFO L87 Difference]: Start difference. First operand 9581 states and 43055 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:24,691 INFO L93 Difference]: Finished difference Result 10628 states and 46970 transitions. [2021-06-12 20:47:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:47:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:24,717 INFO L225 Difference]: With dead ends: 10628 [2021-06-12 20:47:24,717 INFO L226 Difference]: Without dead ends: 10579 [2021-06-12 20:47:24,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1495.6ms TimeCoverageRelationStatistics Valid=500, Invalid=2806, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:47:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10579 states. [2021-06-12 20:47:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10579 to 9492. [2021-06-12 20:47:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9492 states, 9491 states have (on average 4.492571910230745) internal successors, (42639), 9491 states have internal predecessors, (42639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9492 states to 9492 states and 42639 transitions. [2021-06-12 20:47:24,899 INFO L78 Accepts]: Start accepts. Automaton has 9492 states and 42639 transitions. Word has length 33 [2021-06-12 20:47:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:24,899 INFO L482 AbstractCegarLoop]: Abstraction has 9492 states and 42639 transitions. [2021-06-12 20:47:24,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 9492 states and 42639 transitions. [2021-06-12 20:47:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:24,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:24,915 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:25,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-12 20:47:25,116 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 499642994, now seen corresponding path program 51 times [2021-06-12 20:47:25,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:25,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323883371] [2021-06-12 20:47:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:25,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323883371] [2021-06-12 20:47:25,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323883371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148149590] [2021-06-12 20:47:25,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:25,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:25,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:25,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:47:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:25,487 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:47:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:47:25,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:25,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:25,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:25,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:57 [2021-06-12 20:47:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:25,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148149590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:25,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:25,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:25,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085261738] [2021-06-12 20:47:25,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:47:25,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:25,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:47:25,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:25,683 INFO L87 Difference]: Start difference. First operand 9492 states and 42639 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:27,492 INFO L93 Difference]: Finished difference Result 9967 states and 44480 transitions. [2021-06-12 20:47:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:47:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:27,515 INFO L225 Difference]: With dead ends: 9967 [2021-06-12 20:47:27,516 INFO L226 Difference]: Without dead ends: 9929 [2021-06-12 20:47:27,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1371.8ms TimeCoverageRelationStatistics Valid=239, Invalid=2413, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:47:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2021-06-12 20:47:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 9495. [2021-06-12 20:47:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9495 states, 9494 states have (on average 4.492205603539078) internal successors, (42649), 9494 states have internal predecessors, (42649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9495 states to 9495 states and 42649 transitions. [2021-06-12 20:47:27,678 INFO L78 Accepts]: Start accepts. Automaton has 9495 states and 42649 transitions. Word has length 33 [2021-06-12 20:47:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:27,678 INFO L482 AbstractCegarLoop]: Abstraction has 9495 states and 42649 transitions. [2021-06-12 20:47:27,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9495 states and 42649 transitions. [2021-06-12 20:47:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:27,694 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:27,694 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:27,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:27,894 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:27,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1596747550, now seen corresponding path program 52 times [2021-06-12 20:47:27,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:27,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205458989] [2021-06-12 20:47:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:28,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:28,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205458989] [2021-06-12 20:47:28,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205458989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:28,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380975807] [2021-06-12 20:47:28,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:28,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:28,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:28,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:28,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:47:28,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:28,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:28,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:28,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:47:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:28,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380975807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:28,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:28,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:47:28,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999137798] [2021-06-12 20:47:28,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:28,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:28,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:28,306 INFO L87 Difference]: Start difference. First operand 9495 states and 42649 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:29,644 INFO L93 Difference]: Finished difference Result 10804 states and 47776 transitions. [2021-06-12 20:47:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:47:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:29,668 INFO L225 Difference]: With dead ends: 10804 [2021-06-12 20:47:29,668 INFO L226 Difference]: Without dead ends: 10762 [2021-06-12 20:47:29,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1058.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:47:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2021-06-12 20:47:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 9457. [2021-06-12 20:47:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9457 states, 9456 states have (on average 4.491434010152284) internal successors, (42471), 9456 states have internal predecessors, (42471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9457 states to 9457 states and 42471 transitions. [2021-06-12 20:47:29,840 INFO L78 Accepts]: Start accepts. Automaton has 9457 states and 42471 transitions. Word has length 33 [2021-06-12 20:47:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:29,840 INFO L482 AbstractCegarLoop]: Abstraction has 9457 states and 42471 transitions. [2021-06-12 20:47:29,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 9457 states and 42471 transitions. [2021-06-12 20:47:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:29,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:29,855 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:30,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:30,056 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash -193174718, now seen corresponding path program 24 times [2021-06-12 20:47:30,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:30,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907664845] [2021-06-12 20:47:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:30,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:30,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907664845] [2021-06-12 20:47:30,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907664845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:30,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798436241] [2021-06-12 20:47:30,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:30,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:30,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:30,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-12 20:47:30,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:30,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:30,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:30,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-12 20:47:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:30,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798436241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:30,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:30,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:47:30,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853193201] [2021-06-12 20:47:30,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:30,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:30,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:30,667 INFO L87 Difference]: Start difference. First operand 9457 states and 42471 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:30,898 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-12 20:47:31,465 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-12 20:47:32,590 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-12 20:47:32,843 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-12 20:47:33,002 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 20:47:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:33,012 INFO L93 Difference]: Finished difference Result 10621 states and 47146 transitions. [2021-06-12 20:47:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:47:33,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:33,036 INFO L225 Difference]: With dead ends: 10621 [2021-06-12 20:47:33,036 INFO L226 Difference]: Without dead ends: 10602 [2021-06-12 20:47:33,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1976.7ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:47:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10602 states. [2021-06-12 20:47:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10602 to 9615. [2021-06-12 20:47:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9615 states, 9614 states have (on average 4.492926981485334) internal successors, (43195), 9614 states have internal predecessors, (43195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9615 states to 9615 states and 43195 transitions. [2021-06-12 20:47:33,200 INFO L78 Accepts]: Start accepts. Automaton has 9615 states and 43195 transitions. Word has length 33 [2021-06-12 20:47:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:33,200 INFO L482 AbstractCegarLoop]: Abstraction has 9615 states and 43195 transitions. [2021-06-12 20:47:33,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9615 states and 43195 transitions. [2021-06-12 20:47:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:33,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:33,216 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:33,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-12 20:47:33,417 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1229180108, now seen corresponding path program 25 times [2021-06-12 20:47:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:33,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193533784] [2021-06-12 20:47:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:33,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:33,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193533784] [2021-06-12 20:47:33,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193533784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:33,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336557223] [2021-06-12 20:47:33,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:33,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:33,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:33,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:47:33,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:33,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:33,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:33,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:47:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:33,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336557223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:33,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:33,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:33,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310658823] [2021-06-12 20:47:33,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:33,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:33,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:33,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:33,868 INFO L87 Difference]: Start difference. First operand 9615 states and 43195 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:35,142 INFO L93 Difference]: Finished difference Result 10736 states and 47535 transitions. [2021-06-12 20:47:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:47:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:35,166 INFO L225 Difference]: With dead ends: 10736 [2021-06-12 20:47:35,166 INFO L226 Difference]: Without dead ends: 10721 [2021-06-12 20:47:35,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1016.2ms TimeCoverageRelationStatistics Valid=315, Invalid=1755, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:47:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2021-06-12 20:47:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 9625. [2021-06-12 20:47:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 4.491479634247714) internal successors, (43226), 9624 states have internal predecessors, (43226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 43226 transitions. [2021-06-12 20:47:35,347 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 43226 transitions. Word has length 33 [2021-06-12 20:47:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:35,348 INFO L482 AbstractCegarLoop]: Abstraction has 9625 states and 43226 transitions. [2021-06-12 20:47:35,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 43226 transitions. [2021-06-12 20:47:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:35,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:35,444 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:35,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:35,644 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash -439213334, now seen corresponding path program 26 times [2021-06-12 20:47:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:35,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607916794] [2021-06-12 20:47:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:35,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:35,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607916794] [2021-06-12 20:47:35,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607916794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:35,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571453855] [2021-06-12 20:47:35,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:35,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:35,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:36,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:36,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:47:36,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:36,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:36,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:36,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-12 20:47:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:36,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571453855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:36,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:36,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:47:36,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991467010] [2021-06-12 20:47:36,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:36,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:36,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:36,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:36,196 INFO L87 Difference]: Start difference. First operand 9625 states and 43226 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:37,888 INFO L93 Difference]: Finished difference Result 10394 states and 46174 transitions. [2021-06-12 20:47:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:47:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:37,911 INFO L225 Difference]: With dead ends: 10394 [2021-06-12 20:47:37,912 INFO L226 Difference]: Without dead ends: 10380 [2021-06-12 20:47:37,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1424.6ms TimeCoverageRelationStatistics Valid=372, Invalid=1698, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:47:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10380 states. [2021-06-12 20:47:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10380 to 9616. [2021-06-12 20:47:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9616 states, 9615 states have (on average 4.492563702548102) internal successors, (43196), 9615 states have internal predecessors, (43196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 43196 transitions. [2021-06-12 20:47:38,081 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 43196 transitions. Word has length 33 [2021-06-12 20:47:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:38,081 INFO L482 AbstractCegarLoop]: Abstraction has 9616 states and 43196 transitions. [2021-06-12 20:47:38,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 43196 transitions. [2021-06-12 20:47:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:38,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:38,098 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:38,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-12 20:47:38,298 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:38,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1630053640, now seen corresponding path program 27 times [2021-06-12 20:47:38,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:38,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735051764] [2021-06-12 20:47:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:38,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:38,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735051764] [2021-06-12 20:47:38,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735051764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:38,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32887253] [2021-06-12 20:47:38,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:38,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:38,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:38,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:38,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:38,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 20:47:38,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:38,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:38,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:38,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-12 20:47:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:38,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32887253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:38,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:38,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:47:38,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426921138] [2021-06-12 20:47:38,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:38,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:38,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:38,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:38,956 INFO L87 Difference]: Start difference. First operand 9616 states and 43196 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:40,511 INFO L93 Difference]: Finished difference Result 10434 states and 46309 transitions. [2021-06-12 20:47:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:47:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:40,535 INFO L225 Difference]: With dead ends: 10434 [2021-06-12 20:47:40,535 INFO L226 Difference]: Without dead ends: 10411 [2021-06-12 20:47:40,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1352.2ms TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:47:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10411 states. [2021-06-12 20:47:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10411 to 9567. [2021-06-12 20:47:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9567 states, 9566 states have (on average 4.492577879991637) internal successors, (42976), 9566 states have internal predecessors, (42976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9567 states to 9567 states and 42976 transitions. [2021-06-12 20:47:40,705 INFO L78 Accepts]: Start accepts. Automaton has 9567 states and 42976 transitions. Word has length 33 [2021-06-12 20:47:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:40,706 INFO L482 AbstractCegarLoop]: Abstraction has 9567 states and 42976 transitions. [2021-06-12 20:47:40,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9567 states and 42976 transitions. [2021-06-12 20:47:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:40,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:40,722 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:40,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-12 20:47:40,922 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:40,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1268058332, now seen corresponding path program 28 times [2021-06-12 20:47:40,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:40,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527758819] [2021-06-12 20:47:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:41,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527758819] [2021-06-12 20:47:41,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527758819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911026911] [2021-06-12 20:47:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:41,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:41,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:41,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:41,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:41,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:41,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:47:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911026911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:41,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:41,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:41,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990798529] [2021-06-12 20:47:41,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:41,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:41,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:41,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:41,399 INFO L87 Difference]: Start difference. First operand 9567 states and 42976 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:43,077 INFO L93 Difference]: Finished difference Result 10346 states and 46169 transitions. [2021-06-12 20:47:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:47:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:43,101 INFO L225 Difference]: With dead ends: 10346 [2021-06-12 20:47:43,102 INFO L226 Difference]: Without dead ends: 10331 [2021-06-12 20:47:43,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1306.0ms TimeCoverageRelationStatistics Valid=332, Invalid=2320, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:47:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-06-12 20:47:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 9573. [2021-06-12 20:47:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9573 states, 9572 states have (on average 4.491955704137067) internal successors, (42997), 9572 states have internal predecessors, (42997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 42997 transitions. [2021-06-12 20:47:43,262 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 42997 transitions. Word has length 33 [2021-06-12 20:47:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:43,262 INFO L482 AbstractCegarLoop]: Abstraction has 9573 states and 42997 transitions. [2021-06-12 20:47:43,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 42997 transitions. [2021-06-12 20:47:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:43,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:43,278 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:43,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-12 20:47:43,478 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash -942316166, now seen corresponding path program 29 times [2021-06-12 20:47:43,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:43,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751343742] [2021-06-12 20:47:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:43,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:43,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751343742] [2021-06-12 20:47:43,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751343742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:43,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019394507] [2021-06-12 20:47:43,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:43,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:43,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:43,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:47:43,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:43,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:43,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:43,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:47:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:43,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019394507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:43,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:43,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:47:43,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889311658] [2021-06-12 20:47:43,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:43,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:43,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:43,933 INFO L87 Difference]: Start difference. First operand 9573 states and 42997 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:45,322 INFO L93 Difference]: Finished difference Result 10632 states and 47132 transitions. [2021-06-12 20:47:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:47:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:45,346 INFO L225 Difference]: With dead ends: 10632 [2021-06-12 20:47:45,346 INFO L226 Difference]: Without dead ends: 10618 [2021-06-12 20:47:45,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1057.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:47:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2021-06-12 20:47:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 9549. [2021-06-12 20:47:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9549 states, 9548 states have (on average 4.491726015919564) internal successors, (42887), 9548 states have internal predecessors, (42887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9549 states to 9549 states and 42887 transitions. [2021-06-12 20:47:45,520 INFO L78 Accepts]: Start accepts. Automaton has 9549 states and 42887 transitions. Word has length 33 [2021-06-12 20:47:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:45,520 INFO L482 AbstractCegarLoop]: Abstraction has 9549 states and 42887 transitions. [2021-06-12 20:47:45,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 9549 states and 42887 transitions. [2021-06-12 20:47:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:45,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:45,535 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:45,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:45,736 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:45,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1631225734, now seen corresponding path program 30 times [2021-06-12 20:47:45,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:45,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676935123] [2021-06-12 20:47:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:45,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676935123] [2021-06-12 20:47:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676935123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456835196] [2021-06-12 20:47:45,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:45,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:45,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:45,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:46,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,220 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:47:46,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:47:46,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:47:46,244 INFO L628 ElimStorePlain]: treesize reduction 62, result has 26.2 percent of original size [2021-06-12 20:47:46,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:46,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-12 20:47:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:46,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456835196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:46,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:46,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:47:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594264497] [2021-06-12 20:47:46,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:47:46,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:47:46,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:47:46,339 INFO L87 Difference]: Start difference. First operand 9549 states and 42887 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:47,754 INFO L93 Difference]: Finished difference Result 10099 states and 45046 transitions. [2021-06-12 20:47:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:47:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:47,778 INFO L225 Difference]: With dead ends: 10099 [2021-06-12 20:47:47,778 INFO L226 Difference]: Without dead ends: 10084 [2021-06-12 20:47:47,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1106.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:47:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10084 states. [2021-06-12 20:47:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10084 to 9528. [2021-06-12 20:47:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 4.49039571743466) internal successors, (42780), 9527 states have internal predecessors, (42780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 42780 transitions. [2021-06-12 20:47:47,937 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 42780 transitions. Word has length 33 [2021-06-12 20:47:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:47,937 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 42780 transitions. [2021-06-12 20:47:47,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 42780 transitions. [2021-06-12 20:47:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:47,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:47,953 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:48,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:48,153 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 978067898, now seen corresponding path program 31 times [2021-06-12 20:47:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:48,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226459702] [2021-06-12 20:47:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:48,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:48,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226459702] [2021-06-12 20:47:48,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226459702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:48,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34944024] [2021-06-12 20:47:48,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:48,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:47:48,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:48,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:48,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:48,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-12 20:47:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:48,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34944024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:48,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:48,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:48,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268348858] [2021-06-12 20:47:48,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:48,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:48,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:48,624 INFO L87 Difference]: Start difference. First operand 9528 states and 42780 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:49,862 INFO L93 Difference]: Finished difference Result 9976 states and 44626 transitions. [2021-06-12 20:47:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:47:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:49,886 INFO L225 Difference]: With dead ends: 9976 [2021-06-12 20:47:49,886 INFO L226 Difference]: Without dead ends: 9961 [2021-06-12 20:47:49,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 990.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:47:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-12 20:47:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 9528. [2021-06-12 20:47:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 4.49039571743466) internal successors, (42780), 9527 states have internal predecessors, (42780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 42780 transitions. [2021-06-12 20:47:50,044 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 42780 transitions. Word has length 33 [2021-06-12 20:47:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:50,044 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 42780 transitions. [2021-06-12 20:47:50,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 42780 transitions. [2021-06-12 20:47:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:50,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:50,059 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:50,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-12 20:47:50,260 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash 913434392, now seen corresponding path program 32 times [2021-06-12 20:47:50,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:50,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363172970] [2021-06-12 20:47:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:50,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:50,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363172970] [2021-06-12 20:47:50,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363172970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:50,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50592752] [2021-06-12 20:47:50,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:50,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:47:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:50,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2021-06-12 20:47:50,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:50,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:50,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:50,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:51 [2021-06-12 20:47:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:50,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50592752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:50,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:50,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:50,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538975538] [2021-06-12 20:47:50,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:47:50,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:47:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:50,984 INFO L87 Difference]: Start difference. First operand 9528 states and 42780 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:51,791 INFO L93 Difference]: Finished difference Result 9838 states and 43930 transitions. [2021-06-12 20:47:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:47:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:51,813 INFO L225 Difference]: With dead ends: 9838 [2021-06-12 20:47:51,813 INFO L226 Difference]: Without dead ends: 9823 [2021-06-12 20:47:51,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:47:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-06-12 20:47:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 9501. [2021-06-12 20:47:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9501 states, 9500 states have (on average 4.490421052631579) internal successors, (42659), 9500 states have internal predecessors, (42659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9501 states to 9501 states and 42659 transitions. [2021-06-12 20:47:51,967 INFO L78 Accepts]: Start accepts. Automaton has 9501 states and 42659 transitions. Word has length 33 [2021-06-12 20:47:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:51,967 INFO L482 AbstractCegarLoop]: Abstraction has 9501 states and 42659 transitions. [2021-06-12 20:47:51,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9501 states and 42659 transitions. [2021-06-12 20:47:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:51,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:51,983 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:52,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:52,184 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1290172674, now seen corresponding path program 33 times [2021-06-12 20:47:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:52,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180933011] [2021-06-12 20:47:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:52,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:52,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180933011] [2021-06-12 20:47:52,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180933011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:52,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900605786] [2021-06-12 20:47:52,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:52,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:47:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:52,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,625 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:47:52,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:47:52,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:47:52,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:52,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:52,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:47:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:52,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900605786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:52,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:52,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71036240] [2021-06-12 20:47:52,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:47:52,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:47:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:52,826 INFO L87 Difference]: Start difference. First operand 9501 states and 42659 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:54,536 INFO L93 Difference]: Finished difference Result 10727 states and 47709 transitions. [2021-06-12 20:47:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:47:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:54,560 INFO L225 Difference]: With dead ends: 10727 [2021-06-12 20:47:54,561 INFO L226 Difference]: Without dead ends: 10708 [2021-06-12 20:47:54,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1556.5ms TimeCoverageRelationStatistics Valid=326, Invalid=2754, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:47:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-06-12 20:47:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 9629. [2021-06-12 20:47:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9629 states, 9628 states have (on average 4.492106356460324) internal successors, (43250), 9628 states have internal predecessors, (43250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9629 states to 9629 states and 43250 transitions. [2021-06-12 20:47:54,739 INFO L78 Accepts]: Start accepts. Automaton has 9629 states and 43250 transitions. Word has length 33 [2021-06-12 20:47:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:54,739 INFO L482 AbstractCegarLoop]: Abstraction has 9629 states and 43250 transitions. [2021-06-12 20:47:54,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 9629 states and 43250 transitions. [2021-06-12 20:47:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:54,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:54,755 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:54,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-12 20:47:54,956 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:54,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:54,956 INFO L82 PathProgramCache]: Analyzing trace with hash 132182152, now seen corresponding path program 34 times [2021-06-12 20:47:54,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:54,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898510218] [2021-06-12 20:47:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:55,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:55,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898510218] [2021-06-12 20:47:55,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898510218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:55,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552435465] [2021-06-12 20:47:55,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:55,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:55,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:55,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:47:55,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:55,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:55,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:55,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:47:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:55,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552435465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:55,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:55,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:55,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920527574] [2021-06-12 20:47:55,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:55,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:55,417 INFO L87 Difference]: Start difference. First operand 9629 states and 43250 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:56,637 INFO L93 Difference]: Finished difference Result 11520 states and 50652 transitions. [2021-06-12 20:47:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:47:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:56,662 INFO L225 Difference]: With dead ends: 11520 [2021-06-12 20:47:56,663 INFO L226 Difference]: Without dead ends: 11496 [2021-06-12 20:47:56,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:47:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-06-12 20:47:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9758. [2021-06-12 20:47:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9758 states, 9757 states have (on average 4.4934918520036895) internal successors, (43843), 9757 states have internal predecessors, (43843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9758 states to 9758 states and 43843 transitions. [2021-06-12 20:47:56,856 INFO L78 Accepts]: Start accepts. Automaton has 9758 states and 43843 transitions. Word has length 33 [2021-06-12 20:47:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:56,856 INFO L482 AbstractCegarLoop]: Abstraction has 9758 states and 43843 transitions. [2021-06-12 20:47:56,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 9758 states and 43843 transitions. [2021-06-12 20:47:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:56,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:56,872 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:57,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-12 20:47:57,073 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1536211290, now seen corresponding path program 35 times [2021-06-12 20:47:57,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:57,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130574696] [2021-06-12 20:47:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:57,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:57,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130574696] [2021-06-12 20:47:57,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130574696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:57,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599975258] [2021-06-12 20:47:57,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:57,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:57,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:47:57,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:57,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:57,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:57,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:47:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599975258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:57,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:57,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:47:57,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350518] [2021-06-12 20:47:57,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:57,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:57,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:57,527 INFO L87 Difference]: Start difference. First operand 9758 states and 43843 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:58,796 INFO L93 Difference]: Finished difference Result 11492 states and 50585 transitions. [2021-06-12 20:47:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:47:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:47:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:58,822 INFO L225 Difference]: With dead ends: 11492 [2021-06-12 20:47:58,822 INFO L226 Difference]: Without dead ends: 11455 [2021-06-12 20:47:58,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1042.3ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:47:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11455 states. [2021-06-12 20:47:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11455 to 9717. [2021-06-12 20:47:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9717 states, 9716 states have (on average 4.494133388225607) internal successors, (43665), 9716 states have internal predecessors, (43665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9717 states to 9717 states and 43665 transitions. [2021-06-12 20:47:59,068 INFO L78 Accepts]: Start accepts. Automaton has 9717 states and 43665 transitions. Word has length 33 [2021-06-12 20:47:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:59,068 INFO L482 AbstractCegarLoop]: Abstraction has 9717 states and 43665 transitions. [2021-06-12 20:47:59,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 9717 states and 43665 transitions. [2021-06-12 20:47:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:47:59,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:59,084 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:59,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-12 20:47:59,285 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash 171060376, now seen corresponding path program 36 times [2021-06-12 20:47:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:59,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059633865] [2021-06-12 20:47:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:59,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:59,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059633865] [2021-06-12 20:47:59,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059633865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:59,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106180369] [2021-06-12 20:47:59,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:59,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:47:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:59,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 65 [2021-06-12 20:47:59,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:59,779 INFO L628 ElimStorePlain]: treesize reduction 57, result has 55.5 percent of original size [2021-06-12 20:47:59,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:59,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:71 [2021-06-12 20:48:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:00,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106180369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:00,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:00,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:48:00,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658242371] [2021-06-12 20:48:00,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:48:00,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:48:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:00,009 INFO L87 Difference]: Start difference. First operand 9717 states and 43665 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:01,957 INFO L93 Difference]: Finished difference Result 10441 states and 46614 transitions. [2021-06-12 20:48:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:48:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:01,981 INFO L225 Difference]: With dead ends: 10441 [2021-06-12 20:48:01,981 INFO L226 Difference]: Without dead ends: 10426 [2021-06-12 20:48:01,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1720.5ms TimeCoverageRelationStatistics Valid=280, Invalid=2690, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:48:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2021-06-12 20:48:02,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 9699. [2021-06-12 20:48:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9699 states, 9698 states have (on average 4.494431841616828) internal successors, (43587), 9698 states have internal predecessors, (43587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 43587 transitions. [2021-06-12 20:48:02,199 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 43587 transitions. Word has length 33 [2021-06-12 20:48:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:02,199 INFO L482 AbstractCegarLoop]: Abstraction has 9699 states and 43587 transitions. [2021-06-12 20:48:02,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 43587 transitions. [2021-06-12 20:48:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:02,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:02,215 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:02,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-12 20:48:02,416 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 534227778, now seen corresponding path program 37 times [2021-06-12 20:48:02,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:02,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260385479] [2021-06-12 20:48:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:02,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260385479] [2021-06-12 20:48:02,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260385479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046328024] [2021-06-12 20:48:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:02,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:02,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:02,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:48:02,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:02,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:02,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:02,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-12 20:48:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:02,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046328024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:02,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:02,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224337977] [2021-06-12 20:48:02,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:02,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:02,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:02,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:02,890 INFO L87 Difference]: Start difference. First operand 9699 states and 43587 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:04,379 INFO L93 Difference]: Finished difference Result 10417 states and 46552 transitions. [2021-06-12 20:48:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:48:04,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:04,402 INFO L225 Difference]: With dead ends: 10417 [2021-06-12 20:48:04,402 INFO L226 Difference]: Without dead ends: 10402 [2021-06-12 20:48:04,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1111.8ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:48:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2021-06-12 20:48:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 9699. [2021-06-12 20:48:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9699 states, 9698 states have (on average 4.494431841616828) internal successors, (43587), 9698 states have internal predecessors, (43587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 43587 transitions. [2021-06-12 20:48:04,670 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 43587 transitions. Word has length 33 [2021-06-12 20:48:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:04,670 INFO L482 AbstractCegarLoop]: Abstraction has 9699 states and 43587 transitions. [2021-06-12 20:48:04,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 43587 transitions. [2021-06-12 20:48:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:04,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:04,687 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:04,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:04,888 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash 968257124, now seen corresponding path program 38 times [2021-06-12 20:48:04,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:04,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485746659] [2021-06-12 20:48:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:05,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:05,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485746659] [2021-06-12 20:48:05,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485746659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:05,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074712473] [2021-06-12 20:48:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:05,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:05,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:48:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:05,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:05,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:48:05,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:05,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:05,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:05,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:42 [2021-06-12 20:48:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:05,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074712473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:05,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:05,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:05,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578865] [2021-06-12 20:48:05,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:48:05,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:48:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:05,473 INFO L87 Difference]: Start difference. First operand 9699 states and 43587 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:06,600 INFO L93 Difference]: Finished difference Result 10293 states and 45958 transitions. [2021-06-12 20:48:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:48:06,600 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:06,623 INFO L225 Difference]: With dead ends: 10293 [2021-06-12 20:48:06,623 INFO L226 Difference]: Without dead ends: 10278 [2021-06-12 20:48:06,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 918.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:48:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-06-12 20:48:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 9675. [2021-06-12 20:48:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9675 states, 9674 states have (on average 4.49472813727517) internal successors, (43482), 9674 states have internal predecessors, (43482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9675 states to 9675 states and 43482 transitions. [2021-06-12 20:48:06,786 INFO L78 Accepts]: Start accepts. Automaton has 9675 states and 43482 transitions. Word has length 33 [2021-06-12 20:48:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:06,786 INFO L482 AbstractCegarLoop]: Abstraction has 9675 states and 43482 transitions. [2021-06-12 20:48:06,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 9675 states and 43482 transitions. [2021-06-12 20:48:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:06,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:06,802 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:07,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:07,003 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:07,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1134233474, now seen corresponding path program 39 times [2021-06-12 20:48:07,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:07,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010956121] [2021-06-12 20:48:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:07,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:07,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010956121] [2021-06-12 20:48:07,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010956121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:07,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316816245] [2021-06-12 20:48:07,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:07,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:48:07,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:48:07,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:07,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:48:07,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:07,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:07,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:07,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-12 20:48:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:07,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316816245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:07,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:07,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:48:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345531203] [2021-06-12 20:48:07,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:48:07,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:48:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:07,640 INFO L87 Difference]: Start difference. First operand 9675 states and 43482 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:08,962 INFO L93 Difference]: Finished difference Result 10488 states and 46759 transitions. [2021-06-12 20:48:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:48:08,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:08,987 INFO L225 Difference]: With dead ends: 10488 [2021-06-12 20:48:08,987 INFO L226 Difference]: Without dead ends: 10469 [2021-06-12 20:48:08,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1281.0ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:48:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10469 states. [2021-06-12 20:48:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10469 to 9776. [2021-06-12 20:48:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9776 states, 9775 states have (on average 4.49462915601023) internal successors, (43935), 9775 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9776 states to 9776 states and 43935 transitions. [2021-06-12 20:48:09,161 INFO L78 Accepts]: Start accepts. Automaton has 9776 states and 43935 transitions. Word has length 33 [2021-06-12 20:48:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:09,161 INFO L482 AbstractCegarLoop]: Abstraction has 9776 states and 43935 transitions. [2021-06-12 20:48:09,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 9776 states and 43935 transitions. [2021-06-12 20:48:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:09,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:09,177 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:09,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-12 20:48:09,378 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1738378996, now seen corresponding path program 40 times [2021-06-12 20:48:09,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:09,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967983487] [2021-06-12 20:48:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:09,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:09,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967983487] [2021-06-12 20:48:09,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967983487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:09,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529596342] [2021-06-12 20:48:09,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:09,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:09,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:09,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:48:09,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:09,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:09,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:09,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:48:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:09,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529596342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:09,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:09,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:09,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130517242] [2021-06-12 20:48:09,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:09,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:09,841 INFO L87 Difference]: Start difference. First operand 9776 states and 43935 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:11,044 INFO L93 Difference]: Finished difference Result 11073 states and 48968 transitions. [2021-06-12 20:48:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:48:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:11,069 INFO L225 Difference]: With dead ends: 11073 [2021-06-12 20:48:11,069 INFO L226 Difference]: Without dead ends: 11049 [2021-06-12 20:48:11,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1102.5ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:48:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2021-06-12 20:48:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 9893. [2021-06-12 20:48:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9893 states, 9892 states have (on average 4.494844318641326) internal successors, (44463), 9892 states have internal predecessors, (44463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 44463 transitions. [2021-06-12 20:48:11,253 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 44463 transitions. Word has length 33 [2021-06-12 20:48:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:11,253 INFO L482 AbstractCegarLoop]: Abstraction has 9893 states and 44463 transitions. [2021-06-12 20:48:11,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 44463 transitions. [2021-06-12 20:48:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:11,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:11,269 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:11,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-12 20:48:11,470 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash 888194858, now seen corresponding path program 41 times [2021-06-12 20:48:11,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:11,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272311942] [2021-06-12 20:48:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:11,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:11,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272311942] [2021-06-12 20:48:11,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272311942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:11,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751859453] [2021-06-12 20:48:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:11,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:48:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:11,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:11,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:11,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:11,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:11,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:48:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:11,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751859453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:11,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:11,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:48:11,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620904236] [2021-06-12 20:48:11,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:11,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:11,922 INFO L87 Difference]: Start difference. First operand 9893 states and 44463 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:13,200 INFO L93 Difference]: Finished difference Result 11045 states and 48901 transitions. [2021-06-12 20:48:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:48:13,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:13,225 INFO L225 Difference]: With dead ends: 11045 [2021-06-12 20:48:13,225 INFO L226 Difference]: Without dead ends: 11008 [2021-06-12 20:48:13,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1070.9ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:48:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2021-06-12 20:48:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 9750. [2021-06-12 20:48:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9750 states, 9749 states have (on average 4.496563750128218) internal successors, (43837), 9749 states have internal predecessors, (43837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9750 states to 9750 states and 43837 transitions. [2021-06-12 20:48:13,411 INFO L78 Accepts]: Start accepts. Automaton has 9750 states and 43837 transitions. Word has length 33 [2021-06-12 20:48:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:13,411 INFO L482 AbstractCegarLoop]: Abstraction has 9750 states and 43837 transitions. [2021-06-12 20:48:13,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9750 states and 43837 transitions. [2021-06-12 20:48:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:13,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:13,430 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:13,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-12 20:48:13,630 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:13,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1699500772, now seen corresponding path program 42 times [2021-06-12 20:48:13,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:13,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790241810] [2021-06-12 20:48:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:13,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:13,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790241810] [2021-06-12 20:48:13,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790241810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:13,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076323390] [2021-06-12 20:48:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:13,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:48:13,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:14,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,051 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:48:14,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:48:14,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:14,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:14,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:14,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-12 20:48:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:14,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076323390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:14,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:14,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:48:14,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524051265] [2021-06-12 20:48:14,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:48:14,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:48:14,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:14,279 INFO L87 Difference]: Start difference. First operand 9750 states and 43837 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:16,181 INFO L93 Difference]: Finished difference Result 10276 states and 45971 transitions. [2021-06-12 20:48:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:48:16,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:16,204 INFO L225 Difference]: With dead ends: 10276 [2021-06-12 20:48:16,205 INFO L226 Difference]: Without dead ends: 10261 [2021-06-12 20:48:16,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1488.0ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:48:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2021-06-12 20:48:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9729. [2021-06-12 20:48:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9729 states, 9728 states have (on average 4.497224506578948) internal successors, (43749), 9728 states have internal predecessors, (43749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 43749 transitions. [2021-06-12 20:48:16,365 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 43749 transitions. Word has length 33 [2021-06-12 20:48:16,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:16,366 INFO L482 AbstractCegarLoop]: Abstraction has 9729 states and 43749 transitions. [2021-06-12 20:48:16,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 43749 transitions. [2021-06-12 20:48:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:16,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:16,382 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:16,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-12 20:48:16,582 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:16,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1231415870, now seen corresponding path program 43 times [2021-06-12 20:48:16,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:16,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082239740] [2021-06-12 20:48:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:16,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:16,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082239740] [2021-06-12 20:48:16,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082239740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:16,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825309983] [2021-06-12 20:48:16,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:16,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:16,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:16,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:16,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:16,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:48:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:17,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825309983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:17,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:17,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:48:17,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150790390] [2021-06-12 20:48:17,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:17,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:17,050 INFO L87 Difference]: Start difference. First operand 9729 states and 43749 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:18,846 INFO L93 Difference]: Finished difference Result 11677 states and 51380 transitions. [2021-06-12 20:48:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:48:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:18,873 INFO L225 Difference]: With dead ends: 11677 [2021-06-12 20:48:18,874 INFO L226 Difference]: Without dead ends: 11639 [2021-06-12 20:48:18,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1640.7ms TimeCoverageRelationStatistics Valid=472, Invalid=2834, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:48:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11639 states. [2021-06-12 20:48:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11639 to 9953. [2021-06-12 20:48:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9953 states, 9952 states have (on average 4.495578778135048) internal successors, (44740), 9952 states have internal predecessors, (44740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9953 states to 9953 states and 44740 transitions. [2021-06-12 20:48:19,060 INFO L78 Accepts]: Start accepts. Automaton has 9953 states and 44740 transitions. Word has length 33 [2021-06-12 20:48:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:19,060 INFO L482 AbstractCegarLoop]: Abstraction has 9953 states and 44740 transitions. [2021-06-12 20:48:19,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 9953 states and 44740 transitions. [2021-06-12 20:48:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:19,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:19,076 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:19,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:19,277 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1641196600, now seen corresponding path program 44 times [2021-06-12 20:48:19,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:19,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199035111] [2021-06-12 20:48:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:19,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:19,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199035111] [2021-06-12 20:48:19,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199035111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:19,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361007327] [2021-06-12 20:48:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:19,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:19,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:19,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:19,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:48:19,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:19,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:19,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:19,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:48:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361007327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:19,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:19,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:19,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091407445] [2021-06-12 20:48:19,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:48:19,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:48:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:19,856 INFO L87 Difference]: Start difference. First operand 9953 states and 44740 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:20,093 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-06-12 20:48:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:21,676 INFO L93 Difference]: Finished difference Result 11227 states and 49454 transitions. [2021-06-12 20:48:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:48:21,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:21,701 INFO L225 Difference]: With dead ends: 11227 [2021-06-12 20:48:21,701 INFO L226 Difference]: Without dead ends: 11205 [2021-06-12 20:48:21,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1629.5ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:48:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-06-12 20:48:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 10046. [2021-06-12 20:48:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10046 states, 10045 states have (on average 4.493379790940766) internal successors, (45136), 10045 states have internal predecessors, (45136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10046 states to 10046 states and 45136 transitions. [2021-06-12 20:48:21,895 INFO L78 Accepts]: Start accepts. Automaton has 10046 states and 45136 transitions. Word has length 33 [2021-06-12 20:48:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:21,895 INFO L482 AbstractCegarLoop]: Abstraction has 10046 states and 45136 transitions. [2021-06-12 20:48:21,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 10046 states and 45136 transitions. [2021-06-12 20:48:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:21,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:21,911 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:22,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:22,112 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2086298620, now seen corresponding path program 45 times [2021-06-12 20:48:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:22,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007466776] [2021-06-12 20:48:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:22,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:22,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007466776] [2021-06-12 20:48:22,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007466776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:22,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133857449] [2021-06-12 20:48:22,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:22,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:48:22,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:22,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:48:22,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:22,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:22,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:22,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:48:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:22,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133857449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:22,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:22,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:22,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043566962] [2021-06-12 20:48:22,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:48:22,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:48:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:22,800 INFO L87 Difference]: Start difference. First operand 10046 states and 45136 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:22,964 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-12 20:48:23,120 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-12 20:48:23,352 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-12 20:48:24,557 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-12 20:48:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:24,821 INFO L93 Difference]: Finished difference Result 10886 states and 48404 transitions. [2021-06-12 20:48:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:48:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:24,846 INFO L225 Difference]: With dead ends: 10886 [2021-06-12 20:48:24,846 INFO L226 Difference]: Without dead ends: 10871 [2021-06-12 20:48:24,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1967.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:48:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-06-12 20:48:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10037. [2021-06-12 20:48:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10037 states, 10036 states have (on average 4.49471901155839) internal successors, (45109), 10036 states have internal predecessors, (45109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10037 states to 10037 states and 45109 transitions. [2021-06-12 20:48:25,021 INFO L78 Accepts]: Start accepts. Automaton has 10037 states and 45109 transitions. Word has length 33 [2021-06-12 20:48:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:25,022 INFO L482 AbstractCegarLoop]: Abstraction has 10037 states and 45109 transitions. [2021-06-12 20:48:25,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 10037 states and 45109 transitions. [2021-06-12 20:48:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:25,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:25,038 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:25,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-12 20:48:25,239 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash 428070374, now seen corresponding path program 46 times [2021-06-12 20:48:25,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:25,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925490150] [2021-06-12 20:48:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:25,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:25,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925490150] [2021-06-12 20:48:25,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925490150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:25,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014903738] [2021-06-12 20:48:25,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:25,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:25,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:25,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:48:25,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:25,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:25,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:25,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:48:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:25,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014903738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:25,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:25,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:25,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919929041] [2021-06-12 20:48:25,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:25,712 INFO L87 Difference]: Start difference. First operand 10037 states and 45109 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:27,194 INFO L93 Difference]: Finished difference Result 11430 states and 50387 transitions. [2021-06-12 20:48:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:48:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:27,220 INFO L225 Difference]: With dead ends: 11430 [2021-06-12 20:48:27,221 INFO L226 Difference]: Without dead ends: 11396 [2021-06-12 20:48:27,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1236.8ms TimeCoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:48:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11396 states. [2021-06-12 20:48:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11396 to 9986. [2021-06-12 20:48:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 4.495943915873811) internal successors, (44892), 9985 states have internal predecessors, (44892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 44892 transitions. [2021-06-12 20:48:27,444 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 44892 transitions. Word has length 33 [2021-06-12 20:48:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:27,444 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 44892 transitions. [2021-06-12 20:48:27,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 44892 transitions. [2021-06-12 20:48:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:27,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:27,465 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:27,688 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:27,688 INFO L82 PathProgramCache]: Analyzing trace with hash 53715198, now seen corresponding path program 47 times [2021-06-12 20:48:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:27,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378921934] [2021-06-12 20:48:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:27,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378921934] [2021-06-12 20:48:27,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378921934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443241714] [2021-06-12 20:48:27,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:28,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:48:28,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:28,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:28,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:28,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:48:28,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:28,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:28,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:28,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:48:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443241714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:28,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:28,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:48:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841273858] [2021-06-12 20:48:28,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:28,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:28,254 INFO L87 Difference]: Start difference. First operand 9986 states and 44892 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:29,606 INFO L93 Difference]: Finished difference Result 10789 states and 48072 transitions. [2021-06-12 20:48:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:48:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:29,631 INFO L225 Difference]: With dead ends: 10789 [2021-06-12 20:48:29,631 INFO L226 Difference]: Without dead ends: 10770 [2021-06-12 20:48:29,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1141.8ms TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:48:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10770 states. [2021-06-12 20:48:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10770 to 9983. [2021-06-12 20:48:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9983 states, 9982 states have (on average 4.496393508314967) internal successors, (44883), 9982 states have internal predecessors, (44883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9983 states to 9983 states and 44883 transitions. [2021-06-12 20:48:29,893 INFO L78 Accepts]: Start accepts. Automaton has 9983 states and 44883 transitions. Word has length 33 [2021-06-12 20:48:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:29,893 INFO L482 AbstractCegarLoop]: Abstraction has 9983 states and 44883 transitions. [2021-06-12 20:48:29,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9983 states and 44883 transitions. [2021-06-12 20:48:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:29,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:29,911 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:30,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-12 20:48:30,111 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:30,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:30,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1774622960, now seen corresponding path program 48 times [2021-06-12 20:48:30,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:30,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443527801] [2021-06-12 20:48:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:30,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:30,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443527801] [2021-06-12 20:48:30,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443527801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:30,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179027980] [2021-06-12 20:48:30,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:30,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:48:30,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:30,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:30,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,520 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:48:30,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:48:30,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:48:30,543 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-12 20:48:30,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:30,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:48:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:30,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179027980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:30,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:30,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:30,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380643929] [2021-06-12 20:48:30,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:48:30,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:48:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:30,674 INFO L87 Difference]: Start difference. First operand 9983 states and 44883 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:32,415 INFO L93 Difference]: Finished difference Result 11320 states and 50378 transitions. [2021-06-12 20:48:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:48:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:32,441 INFO L225 Difference]: With dead ends: 11320 [2021-06-12 20:48:32,441 INFO L226 Difference]: Without dead ends: 11298 [2021-06-12 20:48:32,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1386.2ms TimeCoverageRelationStatistics Valid=346, Invalid=2624, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:48:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11298 states. [2021-06-12 20:48:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11298 to 10100. [2021-06-12 20:48:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10100 states, 10099 states have (on average 4.497772056639271) internal successors, (45423), 10099 states have internal predecessors, (45423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10100 states to 10100 states and 45423 transitions. [2021-06-12 20:48:32,681 INFO L78 Accepts]: Start accepts. Automaton has 10100 states and 45423 transitions. Word has length 33 [2021-06-12 20:48:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:32,682 INFO L482 AbstractCegarLoop]: Abstraction has 10100 states and 45423 transitions. [2021-06-12 20:48:32,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10100 states and 45423 transitions. [2021-06-12 20:48:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:32,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:32,698 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:32,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-12 20:48:32,898 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:32,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1543091530, now seen corresponding path program 49 times [2021-06-12 20:48:32,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:32,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660978292] [2021-06-12 20:48:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:33,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:33,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660978292] [2021-06-12 20:48:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660978292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:33,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437720746] [2021-06-12 20:48:33,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:33,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:33,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:33,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:33,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:33,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:33,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-12 20:48:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437720746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:33,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:33,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572040807] [2021-06-12 20:48:33,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:33,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:33,333 INFO L87 Difference]: Start difference. First operand 10100 states and 45423 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:34,825 INFO L93 Difference]: Finished difference Result 12313 states and 54178 transitions. [2021-06-12 20:48:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:48:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:34,853 INFO L225 Difference]: With dead ends: 12313 [2021-06-12 20:48:34,854 INFO L226 Difference]: Without dead ends: 12283 [2021-06-12 20:48:34,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1225.2ms TimeCoverageRelationStatistics Valid=404, Invalid=2566, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:48:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12283 states. [2021-06-12 20:48:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12283 to 10217. [2021-06-12 20:48:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 4.500587314017228) internal successors, (45978), 10216 states have internal predecessors, (45978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 45978 transitions. [2021-06-12 20:48:35,174 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 45978 transitions. Word has length 33 [2021-06-12 20:48:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:35,174 INFO L482 AbstractCegarLoop]: Abstraction has 10217 states and 45978 transitions. [2021-06-12 20:48:35,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 45978 transitions. [2021-06-12 20:48:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:35,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:35,192 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:35,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:35,392 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash -697115978, now seen corresponding path program 50 times [2021-06-12 20:48:35,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:35,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942881027] [2021-06-12 20:48:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:35,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:35,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942881027] [2021-06-12 20:48:35,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942881027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:35,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047291783] [2021-06-12 20:48:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:35,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:48:35,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:35,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:35,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:35,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-12 20:48:35,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:35,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:35,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:35,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:32 [2021-06-12 20:48:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047291783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:35,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:35,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:48:35,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595872718] [2021-06-12 20:48:35,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:35,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:35,975 INFO L87 Difference]: Start difference. First operand 10217 states and 45978 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:37,152 INFO L93 Difference]: Finished difference Result 11272 states and 50161 transitions. [2021-06-12 20:48:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:48:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:37,178 INFO L225 Difference]: With dead ends: 11272 [2021-06-12 20:48:37,178 INFO L226 Difference]: Without dead ends: 11249 [2021-06-12 20:48:37,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1107.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:48:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11249 states. [2021-06-12 20:48:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11249 to 10163. [2021-06-12 20:48:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 4.5026569572918715) internal successors, (45756), 10162 states have internal predecessors, (45756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 45756 transitions. [2021-06-12 20:48:37,360 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 45756 transitions. Word has length 33 [2021-06-12 20:48:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:37,360 INFO L482 AbstractCegarLoop]: Abstraction has 10163 states and 45756 transitions. [2021-06-12 20:48:37,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 45756 transitions. [2021-06-12 20:48:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:37,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:37,377 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:37,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable573,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:37,577 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:37,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1059111286, now seen corresponding path program 51 times [2021-06-12 20:48:37,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:37,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687554579] [2021-06-12 20:48:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:37,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:37,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687554579] [2021-06-12 20:48:37,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687554579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:37,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640764321] [2021-06-12 20:48:37,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:37,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:48:37,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:48:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:38,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,075 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:48:38,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:48:38,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:48:38,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:38,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:38,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-12 20:48:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:38,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640764321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:38,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:38,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:48:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573542396] [2021-06-12 20:48:38,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:48:38,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:48:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:38,223 INFO L87 Difference]: Start difference. First operand 10163 states and 45756 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:39,891 INFO L93 Difference]: Finished difference Result 11100 states and 49592 transitions. [2021-06-12 20:48:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:48:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:39,917 INFO L225 Difference]: With dead ends: 11100 [2021-06-12 20:48:39,917 INFO L226 Difference]: Without dead ends: 11085 [2021-06-12 20:48:39,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1297.5ms TimeCoverageRelationStatistics Valid=286, Invalid=2576, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:48:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11085 states. [2021-06-12 20:48:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11085 to 10166. [2021-06-12 20:48:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10166 states, 10165 states have (on average 4.502311854402361) internal successors, (45766), 10165 states have internal predecessors, (45766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10166 states to 10166 states and 45766 transitions. [2021-06-12 20:48:40,095 INFO L78 Accepts]: Start accepts. Automaton has 10166 states and 45766 transitions. Word has length 33 [2021-06-12 20:48:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:40,095 INFO L482 AbstractCegarLoop]: Abstraction has 10166 states and 45766 transitions. [2021-06-12 20:48:40,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10166 states and 45766 transitions. [2021-06-12 20:48:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:40,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:40,114 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:40,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-12 20:48:40,337 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1025481512, now seen corresponding path program 52 times [2021-06-12 20:48:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:40,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167932039] [2021-06-12 20:48:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:40,627 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-06-12 20:48:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:40,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:40,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167932039] [2021-06-12 20:48:40,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167932039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:40,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70000768] [2021-06-12 20:48:40,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:40,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:40,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:48:40,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:40,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:40,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:40,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-12 20:48:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:40,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70000768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:40,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:40,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:48:40,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679319697] [2021-06-12 20:48:40,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:40,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:40,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:40,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:40,948 INFO L87 Difference]: Start difference. First operand 10166 states and 45766 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:42,057 INFO L93 Difference]: Finished difference Result 11765 states and 51971 transitions. [2021-06-12 20:48:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:48:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:42,084 INFO L225 Difference]: With dead ends: 11765 [2021-06-12 20:48:42,085 INFO L226 Difference]: Without dead ends: 11741 [2021-06-12 20:48:42,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1042.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:48:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-06-12 20:48:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 10151. [2021-06-12 20:48:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10151 states, 10150 states have (on average 4.502364532019705) internal successors, (45699), 10150 states have internal predecessors, (45699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10151 states to 10151 states and 45699 transitions. [2021-06-12 20:48:42,291 INFO L78 Accepts]: Start accepts. Automaton has 10151 states and 45699 transitions. Word has length 33 [2021-06-12 20:48:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:42,291 INFO L482 AbstractCegarLoop]: Abstraction has 10151 states and 45699 transitions. [2021-06-12 20:48:42,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 10151 states and 45699 transitions. [2021-06-12 20:48:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:42,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:42,310 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:42,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-12 20:48:42,510 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash -695943884, now seen corresponding path program 53 times [2021-06-12 20:48:42,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:42,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038180149] [2021-06-12 20:48:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:42,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038180149] [2021-06-12 20:48:42,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038180149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210916905] [2021-06-12 20:48:42,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:42,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:48:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:42,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-12 20:48:42,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:42,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:42,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:42,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-12 20:48:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:42,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210916905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:42,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:42,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:42,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090378658] [2021-06-12 20:48:42,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:42,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:42,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:42,967 INFO L87 Difference]: Start difference. First operand 10151 states and 45699 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:44,261 INFO L93 Difference]: Finished difference Result 11130 states and 49756 transitions. [2021-06-12 20:48:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:48:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:44,287 INFO L225 Difference]: With dead ends: 11130 [2021-06-12 20:48:44,287 INFO L226 Difference]: Without dead ends: 11115 [2021-06-12 20:48:44,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 998.8ms TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:48:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11115 states. [2021-06-12 20:48:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11115 to 10151. [2021-06-12 20:48:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10151 states, 10150 states have (on average 4.502364532019705) internal successors, (45699), 10150 states have internal predecessors, (45699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10151 states to 10151 states and 45699 transitions. [2021-06-12 20:48:44,463 INFO L78 Accepts]: Start accepts. Automaton has 10151 states and 45699 transitions. Word has length 33 [2021-06-12 20:48:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:44,464 INFO L482 AbstractCegarLoop]: Abstraction has 10151 states and 45699 transitions. [2021-06-12 20:48:44,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 10151 states and 45699 transitions. [2021-06-12 20:48:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:44,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:44,481 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:44,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-12 20:48:44,681 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -261914538, now seen corresponding path program 54 times [2021-06-12 20:48:44,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:44,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832326064] [2021-06-12 20:48:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:44,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:44,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832326064] [2021-06-12 20:48:44,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832326064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:44,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093064766] [2021-06-12 20:48:44,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:44,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:48:44,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:48:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:45,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:45,119 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:48:45,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 20:48:45,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:48:45,150 INFO L628 ElimStorePlain]: treesize reduction 82, result has 22.6 percent of original size [2021-06-12 20:48:45,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:45,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-06-12 20:48:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:45,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093064766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:45,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:45,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:48:45,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263273815] [2021-06-12 20:48:45,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:48:45,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:45,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:48:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:45,264 INFO L87 Difference]: Start difference. First operand 10151 states and 45699 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:46,730 INFO L93 Difference]: Finished difference Result 10994 states and 49150 transitions. [2021-06-12 20:48:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:48:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:46,755 INFO L225 Difference]: With dead ends: 10994 [2021-06-12 20:48:46,755 INFO L226 Difference]: Without dead ends: 10979 [2021-06-12 20:48:46,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1223.8ms TimeCoverageRelationStatistics Valid=238, Invalid=2414, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:48:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-06-12 20:48:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10127. [2021-06-12 20:48:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10127 states, 10126 states have (on average 4.502666403318191) internal successors, (45594), 10126 states have internal predecessors, (45594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10127 states to 10127 states and 45594 transitions. [2021-06-12 20:48:46,934 INFO L78 Accepts]: Start accepts. Automaton has 10127 states and 45594 transitions. Word has length 33 [2021-06-12 20:48:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:46,934 INFO L482 AbstractCegarLoop]: Abstraction has 10127 states and 45594 transitions. [2021-06-12 20:48:46,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10127 states and 45594 transitions. [2021-06-12 20:48:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:46,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:46,952 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:47,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:47,152 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:47,152 INFO L82 PathProgramCache]: Analyzing trace with hash -95938188, now seen corresponding path program 55 times [2021-06-12 20:48:47,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:47,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107084562] [2021-06-12 20:48:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:47,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107084562] [2021-06-12 20:48:47,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107084562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171279334] [2021-06-12 20:48:47,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:47,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:47,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 20:48:47,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:47,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:47,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:47,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-12 20:48:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171279334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:47,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:47,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:48:47,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229810295] [2021-06-12 20:48:47,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:47,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:47,596 INFO L87 Difference]: Start difference. First operand 10127 states and 45594 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:48,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:48,905 INFO L93 Difference]: Finished difference Result 11762 states and 52137 transitions. [2021-06-12 20:48:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:48:48,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:48,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:48,931 INFO L225 Difference]: With dead ends: 11762 [2021-06-12 20:48:48,931 INFO L226 Difference]: Without dead ends: 11721 [2021-06-12 20:48:48,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1158.2ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:48:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11721 states. [2021-06-12 20:48:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11721 to 10331. [2021-06-12 20:48:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10331 states, 10330 states have (on average 4.50242013552759) internal successors, (46510), 10330 states have internal predecessors, (46510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10331 states to 10331 states and 46510 transitions. [2021-06-12 20:48:49,122 INFO L78 Accepts]: Start accepts. Automaton has 10331 states and 46510 transitions. Word has length 33 [2021-06-12 20:48:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:49,122 INFO L482 AbstractCegarLoop]: Abstraction has 10331 states and 46510 transitions. [2021-06-12 20:48:49,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 10331 states and 46510 transitions. [2021-06-12 20:48:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:49,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:49,140 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:49,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-12 20:48:49,340 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 881314618, now seen corresponding path program 56 times [2021-06-12 20:48:49,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:49,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368419028] [2021-06-12 20:48:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:49,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:49,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368419028] [2021-06-12 20:48:49,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368419028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:49,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404192605] [2021-06-12 20:48:49,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:49,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:49,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:49,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:49,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:49,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:49,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:48:49,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:49,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:49,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:49,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:48:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:49,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404192605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:49,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:49,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:49,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798306441] [2021-06-12 20:48:49,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:48:49,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:49,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:48:49,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:49,931 INFO L87 Difference]: Start difference. First operand 10331 states and 46510 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:50,077 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-12 20:48:50,239 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-12 20:48:50,517 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-12 20:48:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:52,086 INFO L93 Difference]: Finished difference Result 11211 states and 50007 transitions. [2021-06-12 20:48:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:48:52,087 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:52,112 INFO L225 Difference]: With dead ends: 11211 [2021-06-12 20:48:52,112 INFO L226 Difference]: Without dead ends: 11183 [2021-06-12 20:48:52,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 2062.2ms TimeCoverageRelationStatistics Valid=444, Invalid=2208, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:48:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11183 states. [2021-06-12 20:48:52,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11183 to 10277. [2021-06-12 20:48:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 4.504476449980537) internal successors, (46288), 10276 states have internal predecessors, (46288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 46288 transitions. [2021-06-12 20:48:52,296 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 46288 transitions. Word has length 33 [2021-06-12 20:48:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:52,296 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 46288 transitions. [2021-06-12 20:48:52,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 46288 transitions. [2021-06-12 20:48:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:52,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:52,314 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:52,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:52,514 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1365294862, now seen corresponding path program 57 times [2021-06-12 20:48:52,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:52,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620855841] [2021-06-12 20:48:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:52,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620855841] [2021-06-12 20:48:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620855841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861034374] [2021-06-12 20:48:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:52,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:48:52,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:48:52,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:52,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:48:52,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:52,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:52,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:52,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-12 20:48:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:53,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861034374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:53,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:53,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037873507] [2021-06-12 20:48:53,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:48:53,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:48:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:53,133 INFO L87 Difference]: Start difference. First operand 10277 states and 46288 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:54,258 INFO L93 Difference]: Finished difference Result 10874 states and 48697 transitions. [2021-06-12 20:48:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:48:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:54,282 INFO L225 Difference]: With dead ends: 10874 [2021-06-12 20:48:54,283 INFO L226 Difference]: Without dead ends: 10859 [2021-06-12 20:48:54,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 996.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:48:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2021-06-12 20:48:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 10277. [2021-06-12 20:48:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 4.504476449980537) internal successors, (46288), 10276 states have internal predecessors, (46288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 46288 transitions. [2021-06-12 20:48:54,457 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 46288 transitions. Word has length 33 [2021-06-12 20:48:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:54,457 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 46288 transitions. [2021-06-12 20:48:54,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 46288 transitions. [2021-06-12 20:48:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:54,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:54,474 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:54,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-12 20:48:54,675 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1012155372, now seen corresponding path program 58 times [2021-06-12 20:48:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:54,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452801782] [2021-06-12 20:48:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:54,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452801782] [2021-06-12 20:48:54,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452801782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165249921] [2021-06-12 20:48:54,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:54,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:55,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:55,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:55,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:55,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:55,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:48:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:55,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165249921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:55,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:55,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:55,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486852355] [2021-06-12 20:48:55,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:55,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:55,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:55,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:55,118 INFO L87 Difference]: Start difference. First operand 10277 states and 46288 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:56,377 INFO L93 Difference]: Finished difference Result 11601 states and 51505 transitions. [2021-06-12 20:48:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:48:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:56,402 INFO L225 Difference]: With dead ends: 11601 [2021-06-12 20:48:56,402 INFO L226 Difference]: Without dead ends: 11567 [2021-06-12 20:48:56,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1065.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:48:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11567 states. [2021-06-12 20:48:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11567 to 10259. [2021-06-12 20:48:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10259 states, 10258 states have (on average 4.504776759602262) internal successors, (46210), 10258 states have internal predecessors, (46210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10259 states to 10259 states and 46210 transitions. [2021-06-12 20:48:56,585 INFO L78 Accepts]: Start accepts. Automaton has 10259 states and 46210 transitions. Word has length 33 [2021-06-12 20:48:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:56,585 INFO L482 AbstractCegarLoop]: Abstraction has 10259 states and 46210 transitions. [2021-06-12 20:48:56,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 10259 states and 46210 transitions. [2021-06-12 20:48:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:56,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:56,602 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:56,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:56,802 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash -244794408, now seen corresponding path program 59 times [2021-06-12 20:48:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:56,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93676064] [2021-06-12 20:48:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:56,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93676064] [2021-06-12 20:48:56,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93676064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219862297] [2021-06-12 20:48:56,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:57,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:48:57,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:57,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:57,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:57,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:57,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:57,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:48:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:57,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219862297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:57,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:57,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:48:57,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372993763] [2021-06-12 20:48:57,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:57,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:57,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:57,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:57,219 INFO L87 Difference]: Start difference. First operand 10259 states and 46210 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:58,409 INFO L93 Difference]: Finished difference Result 12019 states and 52863 transitions. [2021-06-12 20:48:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:48:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:48:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:58,438 INFO L225 Difference]: With dead ends: 12019 [2021-06-12 20:48:58,438 INFO L226 Difference]: Without dead ends: 11986 [2021-06-12 20:48:58,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 941.4ms TimeCoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:48:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-06-12 20:48:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 10401. [2021-06-12 20:48:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10401 states, 10400 states have (on average 4.504615384615384) internal successors, (46848), 10400 states have internal predecessors, (46848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10401 states to 10401 states and 46848 transitions. [2021-06-12 20:48:58,634 INFO L78 Accepts]: Start accepts. Automaton has 10401 states and 46848 transitions. Word has length 33 [2021-06-12 20:48:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:58,634 INFO L482 AbstractCegarLoop]: Abstraction has 10401 states and 46848 transitions. [2021-06-12 20:48:58,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10401 states and 46848 transitions. [2021-06-12 20:48:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:58,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:58,652 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:58,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-12 20:48:58,853 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash 978497014, now seen corresponding path program 60 times [2021-06-12 20:48:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:58,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334533954] [2021-06-12 20:48:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:59,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334533954] [2021-06-12 20:48:59,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334533954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684501308] [2021-06-12 20:48:59,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:59,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:48:59,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:48:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,247 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:48:59,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:48:59,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:59,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:59,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:59,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:59 [2021-06-12 20:48:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:59,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684501308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:59,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:59,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:48:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431463047] [2021-06-12 20:48:59,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:48:59,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:59,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:48:59,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:59,473 INFO L87 Difference]: Start difference. First operand 10401 states and 46848 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:01,193 INFO L93 Difference]: Finished difference Result 11395 states and 50799 transitions. [2021-06-12 20:49:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:49:01,193 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:01,219 INFO L225 Difference]: With dead ends: 11395 [2021-06-12 20:49:01,219 INFO L226 Difference]: Without dead ends: 11368 [2021-06-12 20:49:01,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1519.8ms TimeCoverageRelationStatistics Valid=389, Invalid=2581, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:49:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2021-06-12 20:49:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 10347. [2021-06-12 20:49:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10347 states, 10346 states have (on average 4.506669244152329) internal successors, (46626), 10346 states have internal predecessors, (46626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10347 states to 10347 states and 46626 transitions. [2021-06-12 20:49:01,401 INFO L78 Accepts]: Start accepts. Automaton has 10347 states and 46626 transitions. Word has length 33 [2021-06-12 20:49:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:01,401 INFO L482 AbstractCegarLoop]: Abstraction has 10347 states and 46626 transitions. [2021-06-12 20:49:01,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 10347 states and 46626 transitions. [2021-06-12 20:49:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:01,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:01,419 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:01,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:01,620 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:01,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1176456464, now seen corresponding path program 61 times [2021-06-12 20:49:01,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:01,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927584184] [2021-06-12 20:49:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:01,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927584184] [2021-06-12 20:49:01,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927584184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842622741] [2021-06-12 20:49:01,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:01,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:49:01,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:02,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:02,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:02,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:49:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:02,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842622741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:02,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:02,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:49:02,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610204355] [2021-06-12 20:49:02,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:49:02,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:49:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:49:02,090 INFO L87 Difference]: Start difference. First operand 10347 states and 46626 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:03,521 INFO L93 Difference]: Finished difference Result 11660 states and 51767 transitions. [2021-06-12 20:49:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:49:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:03,547 INFO L225 Difference]: With dead ends: 11660 [2021-06-12 20:49:03,547 INFO L226 Difference]: Without dead ends: 11622 [2021-06-12 20:49:03,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1135.0ms TimeCoverageRelationStatistics Valid=317, Invalid=1939, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:49:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11622 states. [2021-06-12 20:49:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11622 to 10350. [2021-06-12 20:49:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10350 states, 10349 states have (on average 4.506232486230553) internal successors, (46635), 10349 states have internal predecessors, (46635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10350 states to 10350 states and 46635 transitions. [2021-06-12 20:49:03,723 INFO L78 Accepts]: Start accepts. Automaton has 10350 states and 46635 transitions. Word has length 33 [2021-06-12 20:49:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:03,723 INFO L482 AbstractCegarLoop]: Abstraction has 10350 states and 46635 transitions. [2021-06-12 20:49:03,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10350 states and 46635 transitions. [2021-06-12 20:49:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:03,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:03,741 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:03,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-06-12 20:49:03,941 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1221670398, now seen corresponding path program 62 times [2021-06-12 20:49:03,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:03,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987377459] [2021-06-12 20:49:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:04,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987377459] [2021-06-12 20:49:04,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987377459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46516340] [2021-06-12 20:49:04,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:04,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:04,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:04,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:49:04,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:04,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:04,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:04,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:49:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:04,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46516340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:04,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:04,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:49:04,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381048081] [2021-06-12 20:49:04,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:49:04,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:04,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:49:04,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:49:04,474 INFO L87 Difference]: Start difference. First operand 10350 states and 46635 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:05,777 INFO L93 Difference]: Finished difference Result 11045 states and 49387 transitions. [2021-06-12 20:49:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:49:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:05,802 INFO L225 Difference]: With dead ends: 11045 [2021-06-12 20:49:05,802 INFO L226 Difference]: Without dead ends: 11032 [2021-06-12 20:49:05,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1203.1ms TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:49:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11032 states. [2021-06-12 20:49:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11032 to 10335. [2021-06-12 20:49:05,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 4.507838203986839) internal successors, (46584), 10334 states have internal predecessors, (46584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 46584 transitions. [2021-06-12 20:49:05,978 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 46584 transitions. Word has length 33 [2021-06-12 20:49:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:05,978 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 46584 transitions. [2021-06-12 20:49:05,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 46584 transitions. [2021-06-12 20:49:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:05,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:05,995 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:06,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:06,196 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:06,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2002722272, now seen corresponding path program 63 times [2021-06-12 20:49:06,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:06,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612168687] [2021-06-12 20:49:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:06,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:06,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612168687] [2021-06-12 20:49:06,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612168687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:06,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373585185] [2021-06-12 20:49:06,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:06,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:49:06,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:06,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:06,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:06,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 20:49:06,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:06,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:06,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:06,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-12 20:49:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:06,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373585185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:06,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:06,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:49:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923593219] [2021-06-12 20:49:06,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:49:06,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:49:06,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:49:06,754 INFO L87 Difference]: Start difference. First operand 10335 states and 46584 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:06,950 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-12 20:49:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:09,222 INFO L93 Difference]: Finished difference Result 11294 states and 50345 transitions. [2021-06-12 20:49:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:49:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:09,249 INFO L225 Difference]: With dead ends: 11294 [2021-06-12 20:49:09,249 INFO L226 Difference]: Without dead ends: 11247 [2021-06-12 20:49:09,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2159.8ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:49:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11247 states. [2021-06-12 20:49:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11247 to 10439. [2021-06-12 20:49:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10439 states, 10438 states have (on average 4.505269208660663) internal successors, (47026), 10438 states have internal predecessors, (47026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10439 states to 10439 states and 47026 transitions. [2021-06-12 20:49:09,435 INFO L78 Accepts]: Start accepts. Automaton has 10439 states and 47026 transitions. Word has length 33 [2021-06-12 20:49:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:09,435 INFO L482 AbstractCegarLoop]: Abstraction has 10439 states and 47026 transitions. [2021-06-12 20:49:09,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 10439 states and 47026 transitions. [2021-06-12 20:49:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:09,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:09,453 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:09,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-12 20:49:09,654 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash -580367446, now seen corresponding path program 64 times [2021-06-12 20:49:09,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:09,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901484773] [2021-06-12 20:49:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:09,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:09,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901484773] [2021-06-12 20:49:09,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901484773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:09,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972925025] [2021-06-12 20:49:09,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:09,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:09,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:09,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:49:09,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:09,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:09,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:09,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:49:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972925025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:10,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:10,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:49:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868114929] [2021-06-12 20:49:10,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:49:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:49:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:49:10,062 INFO L87 Difference]: Start difference. First operand 10439 states and 47026 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:10,843 INFO L93 Difference]: Finished difference Result 11094 states and 49567 transitions. [2021-06-12 20:49:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:49:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:10,868 INFO L225 Difference]: With dead ends: 11094 [2021-06-12 20:49:10,868 INFO L226 Difference]: Without dead ends: 10984 [2021-06-12 20:49:10,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:49:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-12 20:49:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 10377. [2021-06-12 20:49:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10376 states have (on average 4.505878951426369) internal successors, (46753), 10376 states have internal predecessors, (46753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 46753 transitions. [2021-06-12 20:49:11,041 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 46753 transitions. Word has length 33 [2021-06-12 20:49:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:11,041 INFO L482 AbstractCegarLoop]: Abstraction has 10377 states and 46753 transitions. [2021-06-12 20:49:11,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 46753 transitions. [2021-06-12 20:49:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:11,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:11,058 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:11,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:11,259 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash -541489222, now seen corresponding path program 65 times [2021-06-12 20:49:11,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:11,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558403026] [2021-06-12 20:49:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:11,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:11,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558403026] [2021-06-12 20:49:11,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558403026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:11,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874599313] [2021-06-12 20:49:11,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:11,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:49:11,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 20:49:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 20:49:11,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:11,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:11,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:11,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:23 [2021-06-12 20:49:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:11,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874599313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:11,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:11,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:49:11,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233436569] [2021-06-12 20:49:11,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:49:11,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:49:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:49:11,771 INFO L87 Difference]: Start difference. First operand 10377 states and 46753 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:12,758 INFO L93 Difference]: Finished difference Result 11014 states and 49436 transitions. [2021-06-12 20:49:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:49:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:12,782 INFO L225 Difference]: With dead ends: 11014 [2021-06-12 20:49:12,783 INFO L226 Difference]: Without dead ends: 10973 [2021-06-12 20:49:12,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 802.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:49:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10973 states. [2021-06-12 20:49:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10973 to 10353. [2021-06-12 20:49:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10353 states, 10352 states have (on average 4.507244976816074) internal successors, (46659), 10352 states have internal predecessors, (46659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10353 states to 10353 states and 46659 transitions. [2021-06-12 20:49:13,013 INFO L78 Accepts]: Start accepts. Automaton has 10353 states and 46659 transitions. Word has length 33 [2021-06-12 20:49:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:13,013 INFO L482 AbstractCegarLoop]: Abstraction has 10353 states and 46659 transitions. [2021-06-12 20:49:13,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 10353 states and 46659 transitions. [2021-06-12 20:49:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:13,031 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:13,031 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:13,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:13,231 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1905539876, now seen corresponding path program 66 times [2021-06-12 20:49:13,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:13,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378618189] [2021-06-12 20:49:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:13,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:13,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378618189] [2021-06-12 20:49:13,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378618189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:13,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202999354] [2021-06-12 20:49:13,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:13,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:49:13,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:13,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,626 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-12 20:49:13,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-12 20:49:13,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:13,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:13,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:13,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-12 20:49:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:13,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202999354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:13,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:13,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:49:13,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667897051] [2021-06-12 20:49:13,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:49:13,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:13,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:49:13,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:49:13,834 INFO L87 Difference]: Start difference. First operand 10353 states and 46659 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:15,953 INFO L93 Difference]: Finished difference Result 11179 states and 49775 transitions. [2021-06-12 20:49:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:49:15,953 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:15,979 INFO L225 Difference]: With dead ends: 11179 [2021-06-12 20:49:15,979 INFO L226 Difference]: Without dead ends: 11132 [2021-06-12 20:49:15,979 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1722.7ms TimeCoverageRelationStatistics Valid=367, Invalid=2713, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:49:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2021-06-12 20:49:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 10439. [2021-06-12 20:49:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10439 states, 10438 states have (on average 4.504598582103851) internal successors, (47019), 10438 states have internal predecessors, (47019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10439 states to 10439 states and 47019 transitions. [2021-06-12 20:49:16,168 INFO L78 Accepts]: Start accepts. Automaton has 10439 states and 47019 transitions. Word has length 33 [2021-06-12 20:49:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:16,169 INFO L482 AbstractCegarLoop]: Abstraction has 10439 states and 47019 transitions. [2021-06-12 20:49:16,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 10439 states and 47019 transitions. [2021-06-12 20:49:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:16,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:16,186 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:16,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-12 20:49:16,386 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash -483185050, now seen corresponding path program 67 times [2021-06-12 20:49:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:16,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435483376] [2021-06-12 20:49:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:16,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:16,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435483376] [2021-06-12 20:49:16,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435483376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:16,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777924168] [2021-06-12 20:49:16,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:49:16,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:16,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:16,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:16,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-12 20:49:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:16,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777924168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:16,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:16,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:49:16,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788456258] [2021-06-12 20:49:16,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:49:16,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:49:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:49:16,794 INFO L87 Difference]: Start difference. First operand 10439 states and 47019 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:17,757 INFO L93 Difference]: Finished difference Result 11175 states and 49906 transitions. [2021-06-12 20:49:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:17,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:17,783 INFO L225 Difference]: With dead ends: 11175 [2021-06-12 20:49:17,783 INFO L226 Difference]: Without dead ends: 11096 [2021-06-12 20:49:17,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:49:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11096 states. [2021-06-12 20:49:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11096 to 10379. [2021-06-12 20:49:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 4.505010599344768) internal successors, (46753), 10378 states have internal predecessors, (46753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 46753 transitions. [2021-06-12 20:49:17,957 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 46753 transitions. Word has length 33 [2021-06-12 20:49:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:17,957 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 46753 transitions. [2021-06-12 20:49:17,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 46753 transitions. [2021-06-12 20:49:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:17,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:17,975 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:18,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:18,175 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1211726748, now seen corresponding path program 68 times [2021-06-12 20:49:18,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:18,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366170904] [2021-06-12 20:49:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:18,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:18,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366170904] [2021-06-12 20:49:18,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366170904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:18,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382701877] [2021-06-12 20:49:18,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:18,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:18,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:49:18,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:18,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:18,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:18,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:49:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:18,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382701877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:18,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:18,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:49:18,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186148994] [2021-06-12 20:49:18,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:49:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:18,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:49:18,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:49:18,719 INFO L87 Difference]: Start difference. First operand 10379 states and 46753 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:20,756 INFO L93 Difference]: Finished difference Result 11152 states and 49882 transitions. [2021-06-12 20:49:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:49:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:49:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:20,782 INFO L225 Difference]: With dead ends: 11152 [2021-06-12 20:49:20,783 INFO L226 Difference]: Without dead ends: 11106 [2021-06-12 20:49:20,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1411.5ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:49:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-06-12 20:49:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10379. [2021-06-12 20:49:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 4.504721526305646) internal successors, (46750), 10378 states have internal predecessors, (46750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 46750 transitions. [2021-06-12 20:49:20,963 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 46750 transitions. Word has length 33 [2021-06-12 20:49:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:20,963 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 46750 transitions. [2021-06-12 20:49:20,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 46750 transitions. [2021-06-12 20:49:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:49:20,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:20,981 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:21,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable606 [2021-06-12 20:49:21,181 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2107468512, now seen corresponding path program 69 times [2021-06-12 20:49:21,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:21,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080181574] [2021-06-12 20:49:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:21,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:21,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080181574] [2021-06-12 20:49:21,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080181574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:21,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585607219] [2021-06-12 20:49:21,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:21,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:49:21,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:49:21,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:21,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:21,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:49:21,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:21,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:21,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:21,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-12 20:49:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:21,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585607219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:21,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:21,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:49:21,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085345890] [2021-06-12 20:49:21,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:49:21,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:49:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:49:21,762 INFO L87 Difference]: Start difference. First operand 10379 states and 46750 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-12 20:49:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:49:22,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:22,992 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:49:22,992 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (5/5) [2021-06-12 20:49:22,993 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:49:22,995 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:49:22,995 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:49:22 BasicIcfg [2021-06-12 20:49:22,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:49:22,995 INFO L168 Benchmark]: Toolchain (without parser) took 766741.29 ms. Allocated memory was 178.3 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 157.8 MB in the beginning and 1.1 GB in the end (delta: -946.2 MB). Peak memory consumption was 673.7 MB. Max. memory is 8.0 GB. [2021-06-12 20:49:22,996 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 159.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:49:22,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 178.3 MB. Free memory was 157.8 MB in the beginning and 156.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:49:22,996 INFO L168 Benchmark]: Boogie Preprocessor took 16.88 ms. Allocated memory is still 178.3 MB. Free memory was 156.2 MB in the beginning and 155.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:49:22,996 INFO L168 Benchmark]: RCFGBuilder took 289.94 ms. Allocated memory is still 178.3 MB. Free memory was 155.1 MB in the beginning and 138.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:49:22,996 INFO L168 Benchmark]: TraceAbstraction took 766404.05 ms. Allocated memory was 178.3 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 137.9 MB in the beginning and 1.1 GB in the end (delta: -966.1 MB). Peak memory consumption was 653.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:49:22,996 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 159.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 178.3 MB. Free memory was 157.8 MB in the beginning and 156.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.88 ms. Allocated memory is still 178.3 MB. Free memory was 156.2 MB in the beginning and 155.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 289.94 ms. Allocated memory is still 178.3 MB. Free memory was 155.1 MB in the beginning and 138.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 766404.05 ms. Allocated memory was 178.3 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 137.9 MB in the beginning and 1.1 GB in the end (delta: -966.1 MB). Peak memory consumption was 653.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (10379states) and FLOYD_HOARE automaton (currently 23 states, 24 states before enhancement),while ReachableStatesComputation was computing reachable states (491 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4Thread1of1ForFork4 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 74.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 15.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=447occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 8.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=447occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork1 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=447occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.1ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=447occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 766047.9ms, OverallIterations: 369, TraceHistogramMax: 2, EmptinessCheckTime: 4448.4ms, AutomataDifference: 472572.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46468 SDtfs, 156347 SDslu, 593609 SDs, 0 SdLazy, 384038 SolverSat, 27224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140540.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23227 GetRequests, 7790 SyntacticMatches, 802 SemanticMatches, 14635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171344 ImplicationChecksByTransitivity, 387538.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10439occurred in iteration=363, InterpolantAutomatonStates: 12004, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46280.4ms AutomataMinimizationTime, 368 MinimizatonAttempts, 315421 StatesRemovedByMinimization, 368 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2133.0ms SsaConstructionTime, 5389.8ms SatisfiabilityAnalysisTime, 152125.8ms InterpolantComputationTime, 23357 NumberOfCodeBlocks, 23357 NumberOfCodeBlocksAsserted, 1217 NumberOfCheckSat, 22622 ConstructedInterpolants, 35 QuantifiedInterpolants, 414214 SizeOfPredicates, 4619 NumberOfNonLiveVariables, 50439 ConjunctsInSsa, 13539 ConjunctsInUnsatCore, 735 InterpolantComputations, 5 PerfectInterpolantSequences, 40/4351 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown