/usr/bin/java -Xmx16000000000 -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 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:29:45,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:29:45,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:29:45,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:29:45,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 22:29:45,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 22:29:45,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 22:29:45,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 22:29:45,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 22:29:45,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 22:29:45,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 22:29:45,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 22:29:45,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 22:29:45,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 22:29:45,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 22:29:45,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 22:29:45,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 22:29:45,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 22:29:45,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 22:29:45,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 22:29:45,200 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 [2021-06-05 22:29:45,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:29:45,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:29:45,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:29:45,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:29:45,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:29:45,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:29:45,237 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:29:45,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:29:45,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:29:45,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:29:45,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:29:45,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:29:45,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:29:45,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:29:45,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:29:45,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:29:45,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:29:45,240 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:29:45,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:29:45,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:29:45,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:29:45,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:29:45,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:29:45,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:29:45,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:29:45,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:29:45,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:29:45,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:29:45,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:29:45,241 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:29:45,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:29:45,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:29:45,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:29:45,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:29:45,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:29:45,568 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:29:45,569 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:29:45,570 INFO L432 ainManager$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 [2021-06-05 22:29:45,570 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-06-05 22:29:45,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:29:45,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:29:45,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:29:45,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:29:45,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:29:45,627 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,636 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:29:45,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:29:45,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:29:45,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:29:45,652 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,652 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,663 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,663 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,671 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,673 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,674 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 05.06 10:29:45" (1/1) ... [2021-06-05 22:29:45,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:29:45,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:29:45,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:29:45,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:29:45,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:45" (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 [2021-06-05 22:29:45,741 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:29:45,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:29:45,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:29:45,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:29:45,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:29:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:29:45,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:29:45,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:29:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:29:45,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:29:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:29:45,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:29:45,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 22:29:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 22:29:45,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 22:29:45,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 22:29:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 22:29:45,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 22:29:45,745 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 22:29:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 22:29:45,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 22:29:45,746 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:29:46,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:29:46,033 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 22:29:46,034 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 22:29:46,034 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 22:29:46,034 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 22:29:46,034 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 22:29:46,035 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:29:46 BoogieIcfgContainer [2021-06-05 22:29:46,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:29:46,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:29:46,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:29:46,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:29:46,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:45" (1/2) ... [2021-06-05 22:29:46,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b73034e and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:29:46, skipping insertion in model container [2021-06-05 22:29:46,040 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 05.06 10:29:46" (2/2) ... [2021-06-05 22:29:46,041 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-06-05 22:29:46,061 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:29:46,062 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:29:46,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:29:46,063 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:29:46,206 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-05 22:29:46,225 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:29:46,254 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:29:46,254 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:29:46,254 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:29:46,254 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:29:46,254 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:29:46,254 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:29:46,255 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:29:46,255 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork4======== [2021-06-05 22:29:46,267 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-05 22:29:46,317 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) [2021-06-05 22:29:46,320 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) [2021-06-05 22:29:46,340 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:29:46,341 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork4 was SAFE (1/5) [2021-06-05 22:29:46,343 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:29:46,348 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:29:46,348 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:29:46,348 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:29:46,348 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:29:46,348 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:29:46,348 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:29:46,350 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:29:46,350 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1======== [2021-06-05 22:29:46,354 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-05 22:29:46,368 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) [2021-06-05 22:29:46,369 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) [2021-06-05 22:29:46,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:29:46,371 INFO L301 ceAbstractionStarter]: Result for error location thread1 was SAFE (2/5) [2021-06-05 22:29:46,372 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:29:46,381 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:29:46,381 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:29:46,381 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:29:46,381 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:29:46,381 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:29:46,381 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:29:46,381 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:29:46,382 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork1======== [2021-06-05 22:29:46,384 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-05 22:29:46,400 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) [2021-06-05 22:29:46,401 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) [2021-06-05 22:29:46,402 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:29:46,403 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork1 was SAFE (3/5) [2021-06-05 22:29:46,403 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:29:46,405 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:29:46,405 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:29:46,406 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:29:46,406 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:29:46,406 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:29:46,407 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:29:46,407 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:29:46,407 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4======== [2021-06-05 22:29:46,410 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-05 22:29:46,430 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) [2021-06-05 22:29:46,433 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) [2021-06-05 22:29:46,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:29:46,436 INFO L301 ceAbstractionStarter]: Result for error location thread4 was SAFE (4/5) [2021-06-05 22:29:46,436 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:29:46,439 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:29:46,439 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:29:46,439 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:29:46,439 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:29:46,439 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:29:46,439 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:29:46,439 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:29:46,440 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:29:46,443 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-05 22:29:46,458 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) [2021-06-05 22:29:46,461 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) [2021-06-05 22:29:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:29:46,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:46,464 INFO L554 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] [2021-06-05 22:29:46,464 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:46,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-06-05 22:29:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:46,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593082311] [2021-06-05 22:29:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:46,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:46,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593082311] [2021-06-05 22:29:46,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593082311] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:46,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:29:46,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:29:46,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475771040] [2021-06-05 22:29:46,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:29:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:46,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:29:46,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:29:46,688 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) [2021-06-05 22:29:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:46,789 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2021-06-05 22:29:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:29:46,790 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 [2021-06-05 22:29:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:46,809 INFO L225 Difference]: With dead ends: 893 [2021-06-05 22:29:46,809 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 22:29:46,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:29:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 22:29:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-06-05 22:29:46,879 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) [2021-06-05 22:29:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-06-05 22:29:46,884 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-06-05 22:29:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:46,885 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-06-05 22:29:46,885 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) [2021-06-05 22:29:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-06-05 22:29:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:29:46,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:46,888 INFO L554 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] [2021-06-05 22:29:46,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:29:46,888 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-06-05 22:29:46,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:46,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311552407] [2021-06-05 22:29:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:47,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:47,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311552407] [2021-06-05 22:29:47,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311552407] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:47,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:29:47,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:29:47,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373671963] [2021-06-05 22:29:47,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:29:47,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:47,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:29:47,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:29:47,030 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) [2021-06-05 22:29:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:47,139 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2021-06-05 22:29:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:29:47,140 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 [2021-06-05 22:29:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:47,146 INFO L225 Difference]: With dead ends: 872 [2021-06-05 22:29:47,146 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 22:29:47,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:29:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 22:29:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-06-05 22:29:47,173 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) [2021-06-05 22:29:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-06-05 22:29:47,176 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-06-05 22:29:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:47,177 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-06-05 22:29:47,177 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) [2021-06-05 22:29:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-06-05 22:29:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:29:47,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:47,180 INFO L554 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] [2021-06-05 22:29:47,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:29:47,181 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-06-05 22:29:47,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:47,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288192399] [2021-06-05 22:29:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:47,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:47,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288192399] [2021-06-05 22:29:47,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288192399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:47,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226379507] [2021-06-05 22:29:47,282 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 [2021-06-05 22:29:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:29:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:47,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226379507] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:47,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:29:47,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-06-05 22:29:47,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297687171] [2021-06-05 22:29:47,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:29:47,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:29:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:29:47,516 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) [2021-06-05 22:29:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:47,559 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2021-06-05 22:29:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:29:47,559 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 [2021-06-05 22:29:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:47,565 INFO L225 Difference]: With dead ends: 867 [2021-06-05 22:29:47,565 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 22:29:47,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:29:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 22:29:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-06-05 22:29:47,593 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) [2021-06-05 22:29:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-06-05 22:29:47,597 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-06-05 22:29:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:47,597 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-06-05 22:29:47,597 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) [2021-06-05 22:29:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-06-05 22:29:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:29:47,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:47,600 INFO L554 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] [2021-06-05 22:29:47,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 22:29:47,813 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-06-05 22:29:47,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:47,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263891910] [2021-06-05 22:29:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:47,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:47,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263891910] [2021-06-05 22:29:47,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263891910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:47,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744286768] [2021-06-05 22:29:47,902 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 [2021-06-05 22:29:47,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:47,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:29:47,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744286768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:48,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 22:29:48,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686446800] [2021-06-05 22:29:48,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:29:48,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:48,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:29:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:29:48,054 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) [2021-06-05 22:29:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:48,261 INFO L93 Difference]: Finished difference Result 1660 states and 6252 transitions. [2021-06-05 22:29:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:48,262 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 [2021-06-05 22:29:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:48,270 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 22:29:48,271 INFO L226 Difference]: Without dead ends: 1532 [2021-06-05 22:29:48,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-06-05 22:29:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1029. [2021-06-05 22:29:48,300 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) [2021-06-05 22:29:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4251 transitions. [2021-06-05 22:29:48,305 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4251 transitions. Word has length 27 [2021-06-05 22:29:48,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:48,305 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 4251 transitions. [2021-06-05 22:29:48,306 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) [2021-06-05 22:29:48,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4251 transitions. [2021-06-05 22:29:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:29:48,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:48,309 INFO L554 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] [2021-06-05 22:29:48,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:48,532 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:48,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -700559147, now seen corresponding path program 3 times [2021-06-05 22:29:48,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:48,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812114394] [2021-06-05 22:29:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:48,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812114394] [2021-06-05 22:29:48,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812114394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893775646] [2021-06-05 22:29:48,583 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 [2021-06-05 22:29:48,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:48,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:48,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:29:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893775646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:48,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:29:48,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-06-05 22:29:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126970389] [2021-06-05 22:29:48,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:29:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:29:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:29:48,768 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) [2021-06-05 22:29:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:48,818 INFO L93 Difference]: Finished difference Result 1331 states and 5140 transitions. [2021-06-05 22:29:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:29:48,819 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 [2021-06-05 22:29:48,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:48,827 INFO L225 Difference]: With dead ends: 1331 [2021-06-05 22:29:48,827 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 22:29:48,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:29:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 22:29:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 954. [2021-06-05 22:29:48,858 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) [2021-06-05 22:29:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3883 transitions. [2021-06-05 22:29:48,862 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3883 transitions. Word has length 27 [2021-06-05 22:29:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:48,862 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3883 transitions. [2021-06-05 22:29:48,862 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) [2021-06-05 22:29:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3883 transitions. [2021-06-05 22:29:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:29:48,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:48,866 INFO L554 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] [2021-06-05 22:29:49,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:49,089 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:49,089 INFO L82 PathProgramCache]: Analyzing trace with hash 96535007, now seen corresponding path program 1 times [2021-06-05 22:29:49,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:49,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147846391] [2021-06-05 22:29:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:49,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147846391] [2021-06-05 22:29:49,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147846391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899314470] [2021-06-05 22:29:49,122 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 [2021-06-05 22:29:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:29:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899314470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:49,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 22:29:49,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566825834] [2021-06-05 22:29:49,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:29:49,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:29:49,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:29:49,271 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) [2021-06-05 22:29:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:49,344 INFO L93 Difference]: Finished difference Result 1888 states and 7508 transitions. [2021-06-05 22:29:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:29:49,345 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 [2021-06-05 22:29:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:49,356 INFO L225 Difference]: With dead ends: 1888 [2021-06-05 22:29:49,357 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 22:29:49,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:29:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 22:29:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1443. [2021-06-05 22:29:49,397 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) [2021-06-05 22:29:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5949 transitions. [2021-06-05 22:29:49,404 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5949 transitions. Word has length 27 [2021-06-05 22:29:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:49,404 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 5949 transitions. [2021-06-05 22:29:49,404 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) [2021-06-05 22:29:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5949 transitions. [2021-06-05 22:29:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:29:49,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:49,409 INFO L554 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] [2021-06-05 22:29:49,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:49,632 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-06-05 22:29:49,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:49,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762811690] [2021-06-05 22:29:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762811690] [2021-06-05 22:29:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762811690] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:49,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:29:49,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:29:49,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494636752] [2021-06-05 22:29:49,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:29:49,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:29:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:29:49,658 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) [2021-06-05 22:29:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:49,695 INFO L93 Difference]: Finished difference Result 1479 states and 6007 transitions. [2021-06-05 22:29:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:29:49,695 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 [2021-06-05 22:29:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:49,705 INFO L225 Difference]: With dead ends: 1479 [2021-06-05 22:29:49,705 INFO L226 Difference]: Without dead ends: 1437 [2021-06-05 22:29:49,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:29:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-05 22:29:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1422. [2021-06-05 22:29:49,746 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) [2021-06-05 22:29:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 5869 transitions. [2021-06-05 22:29:49,753 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 5869 transitions. Word has length 27 [2021-06-05 22:29:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:49,753 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 5869 transitions. [2021-06-05 22:29:49,753 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) [2021-06-05 22:29:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 5869 transitions. [2021-06-05 22:29:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:49,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:49,758 INFO L554 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] [2021-06-05 22:29:49,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:29:49,758 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1221830146, now seen corresponding path program 1 times [2021-06-05 22:29:49,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:49,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496954350] [2021-06-05 22:29:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496954350] [2021-06-05 22:29:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496954350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159225756] [2021-06-05 22:29:49,956 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 [2021-06-05 22:29:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:29:50,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:50,249 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 [2021-06-05 22:29:50,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:50,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:50,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:50,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:29:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:50,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159225756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:50,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:50,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:29:50,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235532693] [2021-06-05 22:29:50,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:29:50,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:50,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:29:50,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:50,381 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) [2021-06-05 22:29:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:51,221 INFO L93 Difference]: Finished difference Result 1985 states and 8093 transitions. [2021-06-05 22:29:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:51,221 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 [2021-06-05 22:29:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:51,234 INFO L225 Difference]: With dead ends: 1985 [2021-06-05 22:29:51,234 INFO L226 Difference]: Without dead ends: 1966 [2021-06-05 22:29:51,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 721.3ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:29:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-06-05 22:29:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1519. [2021-06-05 22:29:51,296 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) [2021-06-05 22:29:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6252 transitions. [2021-06-05 22:29:51,303 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6252 transitions. Word has length 29 [2021-06-05 22:29:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:51,303 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6252 transitions. [2021-06-05 22:29:51,304 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) [2021-06-05 22:29:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6252 transitions. [2021-06-05 22:29:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:51,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:51,311 INFO L554 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] [2021-06-05 22:29:51,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:51,535 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1456540984, now seen corresponding path program 2 times [2021-06-05 22:29:51,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:51,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753398169] [2021-06-05 22:29:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:51,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:51,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753398169] [2021-06-05 22:29:51,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753398169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:51,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486082874] [2021-06-05 22:29:51,669 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 [2021-06-05 22:29:51,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:51,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:29:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:51,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:51,869 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 22:29:51,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:51,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:51,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:51,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:29:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486082874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:52,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732503611] [2021-06-05 22:29:52,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:52,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:52,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:52,033 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) [2021-06-05 22:29:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:52,466 INFO L93 Difference]: Finished difference Result 1822 states and 7414 transitions. [2021-06-05 22:29:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:29:52,466 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 [2021-06-05 22:29:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:52,493 INFO L225 Difference]: With dead ends: 1822 [2021-06-05 22:29:52,494 INFO L226 Difference]: Without dead ends: 1803 [2021-06-05 22:29:52,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:29:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-06-05 22:29:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1522. [2021-06-05 22:29:52,535 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) [2021-06-05 22:29:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6262 transitions. [2021-06-05 22:29:52,540 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6262 transitions. Word has length 29 [2021-06-05 22:29:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:52,541 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6262 transitions. [2021-06-05 22:29:52,542 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) [2021-06-05 22:29:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6262 transitions. [2021-06-05 22:29:52,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:52,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:52,547 INFO L554 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] [2021-06-05 22:29:52,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:52,761 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2020138408, now seen corresponding path program 3 times [2021-06-05 22:29:52,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:52,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386454987] [2021-06-05 22:29:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:52,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386454987] [2021-06-05 22:29:52,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386454987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242536604] [2021-06-05 22:29:52,901 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 [2021-06-05 22:29:52,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:52,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:29:52,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:53,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:53,080 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 [2021-06-05 22:29:53,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:53,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:53,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:53,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:29:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242536604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:53,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:53,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613196449] [2021-06-05 22:29:53,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:53,226 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) [2021-06-05 22:29:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:53,620 INFO L93 Difference]: Finished difference Result 1919 states and 7749 transitions. [2021-06-05 22:29:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:53,621 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 [2021-06-05 22:29:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:53,628 INFO L225 Difference]: With dead ends: 1919 [2021-06-05 22:29:53,628 INFO L226 Difference]: Without dead ends: 1900 [2021-06-05 22:29:53,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:29:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-06-05 22:29:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1529. [2021-06-05 22:29:53,683 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) [2021-06-05 22:29:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 6283 transitions. [2021-06-05 22:29:53,689 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 6283 transitions. Word has length 29 [2021-06-05 22:29:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:53,689 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 6283 transitions. [2021-06-05 22:29:53,689 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) [2021-06-05 22:29:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 6283 transitions. [2021-06-05 22:29:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:53,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:53,694 INFO L554 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] [2021-06-05 22:29:53,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:29:53,916 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1903603882, now seen corresponding path program 4 times [2021-06-05 22:29:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:53,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738598647] [2021-06-05 22:29:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:54,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:54,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738598647] [2021-06-05 22:29:54,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738598647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:54,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411706399] [2021-06-05 22:29:54,055 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 [2021-06-05 22:29:54,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:54,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:29:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:54,207 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 [2021-06-05 22:29:54,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:54,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:54,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:54,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-05 22:29:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:54,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411706399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:54,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:54,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:29:54,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617917951] [2021-06-05 22:29:54,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:29:54,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:29:54,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:54,319 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) [2021-06-05 22:29:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:55,099 INFO L93 Difference]: Finished difference Result 2650 states and 10619 transitions. [2021-06-05 22:29:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:29:55,099 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 [2021-06-05 22:29:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:55,109 INFO L225 Difference]: With dead ends: 2650 [2021-06-05 22:29:55,109 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 22:29:55,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:29:55,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 22:29:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1650. [2021-06-05 22:29:55,158 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) [2021-06-05 22:29:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6825 transitions. [2021-06-05 22:29:55,165 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6825 transitions. Word has length 29 [2021-06-05 22:29:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:55,165 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 6825 transitions. [2021-06-05 22:29:55,185 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) [2021-06-05 22:29:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6825 transitions. [2021-06-05 22:29:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:55,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:55,191 INFO L554 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] [2021-06-05 22:29:55,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 22:29:55,407 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:55,407 INFO L82 PathProgramCache]: Analyzing trace with hash 235210440, now seen corresponding path program 5 times [2021-06-05 22:29:55,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:55,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12371626] [2021-06-05 22:29:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:55,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:55,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12371626] [2021-06-05 22:29:55,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12371626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103411588] [2021-06-05 22:29:55,530 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 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 [2021-06-05 22:29:55,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:55,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:55,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:29:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:55,691 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 [2021-06-05 22:29:55,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:55,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:55,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:55,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-05 22:29:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:55,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103411588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:55,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:29:55,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098503446] [2021-06-05 22:29:55,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:29:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:29:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:55,799 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) [2021-06-05 22:29:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:56,572 INFO L93 Difference]: Finished difference Result 2697 states and 10750 transitions. [2021-06-05 22:29:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:56,572 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 [2021-06-05 22:29:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:56,581 INFO L225 Difference]: With dead ends: 2697 [2021-06-05 22:29:56,581 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 22:29:56,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:29:56,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 22:29:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1614. [2021-06-05 22:29:56,626 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) [2021-06-05 22:29:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 6686 transitions. [2021-06-05 22:29:56,632 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 6686 transitions. Word has length 29 [2021-06-05 22:29:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:56,632 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 6686 transitions. [2021-06-05 22:29:56,633 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) [2021-06-05 22:29:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 6686 transitions. [2021-06-05 22:29:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:56,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:56,639 INFO L554 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] [2021-06-05 22:29:56,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:56,858 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash -986184770, now seen corresponding path program 6 times [2021-06-05 22:29:56,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:56,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593649715] [2021-06-05 22:29:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:57,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:57,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593649715] [2021-06-05 22:29:57,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593649715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:57,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605194314] [2021-06-05 22:29:57,006 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 [2021-06-05 22:29:57,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:29:57,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:57,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:29:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:57,180 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 [2021-06-05 22:29:57,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:57,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:57,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:57,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-05 22:29:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:57,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605194314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:57,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:57,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:29:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079452452] [2021-06-05 22:29:57,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:29:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:29:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:57,336 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) [2021-06-05 22:29:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:58,232 INFO L93 Difference]: Finished difference Result 2293 states and 9357 transitions. [2021-06-05 22:29:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:29:58,232 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 [2021-06-05 22:29:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:58,241 INFO L225 Difference]: With dead ends: 2293 [2021-06-05 22:29:58,241 INFO L226 Difference]: Without dead ends: 2274 [2021-06-05 22:29:58,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:29:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-06-05 22:29:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1602. [2021-06-05 22:29:58,284 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) [2021-06-05 22:29:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6640 transitions. [2021-06-05 22:29:58,290 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6640 transitions. Word has length 29 [2021-06-05 22:29:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:58,290 INFO L482 AbstractCegarLoop]: Abstraction has 1602 states and 6640 transitions. [2021-06-05 22:29:58,290 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) [2021-06-05 22:29:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6640 transitions. [2021-06-05 22:29:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:58,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:58,294 INFO L554 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] [2021-06-05 22:29:58,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:58,509 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:58,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1050279366, now seen corresponding path program 7 times [2021-06-05 22:29:58,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:58,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224492955] [2021-06-05 22:29:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:58,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:58,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224492955] [2021-06-05 22:29:58,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224492955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:58,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665202643] [2021-06-05 22:29:58,661 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 [2021-06-05 22:29:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:29:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:58,785 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 [2021-06-05 22:29:58,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:58,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:58,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:58,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 22:29:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:58,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665202643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:58,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:58,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:29:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131394619] [2021-06-05 22:29:58,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:29:58,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:29:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:58,925 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) [2021-06-05 22:29:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:59,524 INFO L93 Difference]: Finished difference Result 2048 states and 8428 transitions. [2021-06-05 22:29:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:59,524 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 [2021-06-05 22:29:59,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:59,531 INFO L225 Difference]: With dead ends: 2048 [2021-06-05 22:29:59,531 INFO L226 Difference]: Without dead ends: 2033 [2021-06-05 22:29:59,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:29:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-06-05 22:29:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1635. [2021-06-05 22:29:59,569 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) [2021-06-05 22:29:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6789 transitions. [2021-06-05 22:29:59,574 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6789 transitions. Word has length 29 [2021-06-05 22:29:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:59,574 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 6789 transitions. [2021-06-05 22:29:59,574 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) [2021-06-05 22:29:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6789 transitions. [2021-06-05 22:29:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:29:59,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:59,578 INFO L554 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] [2021-06-05 22:29:59,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 22:29:59,800 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1403418856, now seen corresponding path program 8 times [2021-06-05 22:29:59,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:59,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006537171] [2021-06-05 22:29:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:59,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:59,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006537171] [2021-06-05 22:29:59,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006537171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937489838] [2021-06-05 22:29:59,925 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 [2021-06-05 22:29:59,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:00,035 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 [2021-06-05 22:30:00,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:00,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:00,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:00,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:21 [2021-06-05 22:30:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937489838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:00,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:00,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:30:00,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229427305] [2021-06-05 22:30:00,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:30:00,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:00,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:30:00,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:00,163 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) [2021-06-05 22:30:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:01,007 INFO L93 Difference]: Finished difference Result 2546 states and 10245 transitions. [2021-06-05 22:30:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:30:01,008 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 [2021-06-05 22:30:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:01,014 INFO L225 Difference]: With dead ends: 2546 [2021-06-05 22:30:01,014 INFO L226 Difference]: Without dead ends: 2516 [2021-06-05 22:30:01,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 668.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:30:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-06-05 22:30:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1748. [2021-06-05 22:30:01,058 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) [2021-06-05 22:30:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 7273 transitions. [2021-06-05 22:30:01,064 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 7273 transitions. Word has length 29 [2021-06-05 22:30:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:01,065 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 7273 transitions. [2021-06-05 22:30:01,065 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) [2021-06-05 22:30:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 7273 transitions. [2021-06-05 22:30:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:01,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:01,069 INFO L554 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] [2021-06-05 22:30:01,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:30:01,285 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1034313432, now seen corresponding path program 9 times [2021-06-05 22:30:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101338540] [2021-06-05 22:30:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:01,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101338540] [2021-06-05 22:30:01,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101338540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89369903] [2021-06-05 22:30:01,419 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 [2021-06-05 22:30:01,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:01,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:30:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:01,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:01,523 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 11 treesize of output 15 [2021-06-05 22:30:01,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:01,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:01,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:01,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 22:30:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89369903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:01,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:01,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:01,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407162340] [2021-06-05 22:30:01,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:01,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:01,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:01,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:01,682 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) [2021-06-05 22:30:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:01,998 INFO L93 Difference]: Finished difference Result 2035 states and 8391 transitions. [2021-06-05 22:30:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:01,998 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 [2021-06-05 22:30:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:02,003 INFO L225 Difference]: With dead ends: 2035 [2021-06-05 22:30:02,003 INFO L226 Difference]: Without dead ends: 2021 [2021-06-05 22:30:02,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-05 22:30:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1745. [2021-06-05 22:30:02,040 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) [2021-06-05 22:30:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 7263 transitions. [2021-06-05 22:30:02,073 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 7263 transitions. Word has length 29 [2021-06-05 22:30:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:02,073 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 7263 transitions. [2021-06-05 22:30:02,073 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) [2021-06-05 22:30:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 7263 transitions. [2021-06-05 22:30:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:02,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:02,078 INFO L554 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] [2021-06-05 22:30:02,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:30:02,293 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1148225234, now seen corresponding path program 10 times [2021-06-05 22:30:02,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:02,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63687850] [2021-06-05 22:30:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63687850] [2021-06-05 22:30:02,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63687850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310263488] [2021-06-05 22:30:02,412 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 [2021-06-05 22:30:02,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:02,525 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 [2021-06-05 22:30:02,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:02,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:02,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:02,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 22:30:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310263488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:02,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:30:02,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727153864] [2021-06-05 22:30:02,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:30:02,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:30:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:02,631 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) [2021-06-05 22:30:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:03,228 INFO L93 Difference]: Finished difference Result 2564 states and 10283 transitions. [2021-06-05 22:30:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:03,229 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 [2021-06-05 22:30:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:03,233 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 22:30:03,233 INFO L226 Difference]: Without dead ends: 2519 [2021-06-05 22:30:03,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-05 22:30:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1747. [2021-06-05 22:30:03,275 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) [2021-06-05 22:30:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 7302 transitions. [2021-06-05 22:30:03,282 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 7302 transitions. Word has length 29 [2021-06-05 22:30:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:03,282 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 7302 transitions. [2021-06-05 22:30:03,282 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) [2021-06-05 22:30:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 7302 transitions. [2021-06-05 22:30:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:03,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:03,287 INFO L554 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] [2021-06-05 22:30:03,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:03,497 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1678080530, now seen corresponding path program 11 times [2021-06-05 22:30:03,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:03,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050689151] [2021-06-05 22:30:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:03,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:03,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050689151] [2021-06-05 22:30:03,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050689151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:03,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748571038] [2021-06-05 22:30:03,615 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 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 [2021-06-05 22:30:03,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:03,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:03,731 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 [2021-06-05 22:30:03,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:03,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:03,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:03,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 22:30:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:03,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748571038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:03,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:03,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:30:03,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395665443] [2021-06-05 22:30:03,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:30:03,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:03,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:30:03,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:03,852 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) [2021-06-05 22:30:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:04,590 INFO L93 Difference]: Finished difference Result 2798 states and 11434 transitions. [2021-06-05 22:30:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:04,590 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 [2021-06-05 22:30:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:04,596 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 22:30:04,596 INFO L226 Difference]: Without dead ends: 2768 [2021-06-05 22:30:04,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 605.5ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-06-05 22:30:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1923. [2021-06-05 22:30:04,643 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) [2021-06-05 22:30:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 8091 transitions. [2021-06-05 22:30:04,650 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 8091 transitions. Word has length 29 [2021-06-05 22:30:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:04,651 INFO L482 AbstractCegarLoop]: Abstraction has 1923 states and 8091 transitions. [2021-06-05 22:30:04,651 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) [2021-06-05 22:30:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 8091 transitions. [2021-06-05 22:30:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:04,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:04,656 INFO L554 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] [2021-06-05 22:30:04,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:30:04,869 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash -179154478, now seen corresponding path program 12 times [2021-06-05 22:30:04,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:04,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485857773] [2021-06-05 22:30:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:04,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485857773] [2021-06-05 22:30:04,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485857773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973368853] [2021-06-05 22:30:04,985 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 [2021-06-05 22:30:05,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:05,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:05,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:05,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:30:05,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:05,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:05,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:05,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:05,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973368853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:05,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:05,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:05,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573756394] [2021-06-05 22:30:05,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:05,261 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) [2021-06-05 22:30:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:06,082 INFO L93 Difference]: Finished difference Result 2469 states and 10170 transitions. [2021-06-05 22:30:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:06,083 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 [2021-06-05 22:30:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:06,088 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 22:30:06,088 INFO L226 Difference]: Without dead ends: 2455 [2021-06-05 22:30:06,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 743.2ms TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:30:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-05 22:30:06,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1916. [2021-06-05 22:30:06,126 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) [2021-06-05 22:30:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 8067 transitions. [2021-06-05 22:30:06,133 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 8067 transitions. Word has length 29 [2021-06-05 22:30:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:06,134 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 8067 transitions. [2021-06-05 22:30:06,134 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) [2021-06-05 22:30:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 8067 transitions. [2021-06-05 22:30:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:06,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:06,138 INFO L554 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] [2021-06-05 22:30:06,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:06,353 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:06,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:06,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1437329684, now seen corresponding path program 13 times [2021-06-05 22:30:06,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:06,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423754167] [2021-06-05 22:30:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:06,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:06,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423754167] [2021-06-05 22:30:06,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423754167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:06,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092348126] [2021-06-05 22:30:06,461 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 [2021-06-05 22:30:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:06,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:06,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:06,555 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 [2021-06-05 22:30:06,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:06,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:06,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:06,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 22:30:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:06,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092348126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:06,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:06,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:30:06,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116740359] [2021-06-05 22:30:06,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:30:06,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:30:06,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:06,661 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) [2021-06-05 22:30:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:07,321 INFO L93 Difference]: Finished difference Result 2797 states and 11216 transitions. [2021-06-05 22:30:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:07,321 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 [2021-06-05 22:30:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:07,327 INFO L225 Difference]: With dead ends: 2797 [2021-06-05 22:30:07,327 INFO L226 Difference]: Without dead ends: 2755 [2021-06-05 22:30:07,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 536.9ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-06-05 22:30:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1875. [2021-06-05 22:30:07,390 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) [2021-06-05 22:30:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 7906 transitions. [2021-06-05 22:30:07,398 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 7906 transitions. Word has length 29 [2021-06-05 22:30:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:07,398 INFO L482 AbstractCegarLoop]: Abstraction has 1875 states and 7906 transitions. [2021-06-05 22:30:07,399 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) [2021-06-05 22:30:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 7906 transitions. [2021-06-05 22:30:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:07,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:07,403 INFO L554 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] [2021-06-05 22:30:07,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:07,622 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1021452718, now seen corresponding path program 14 times [2021-06-05 22:30:07,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:07,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818737777] [2021-06-05 22:30:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:07,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818737777] [2021-06-05 22:30:07,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818737777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58704123] [2021-06-05 22:30:07,744 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 [2021-06-05 22:30:07,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:07,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:07,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:07,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:07,843 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 [2021-06-05 22:30:07,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:07,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:07,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:07,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:08,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58704123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:08,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:08,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:08,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443286626] [2021-06-05 22:30:08,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:08,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:08,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:08,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:08,021 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) [2021-06-05 22:30:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:08,317 INFO L93 Difference]: Finished difference Result 2030 states and 8484 transitions. [2021-06-05 22:30:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:08,318 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 [2021-06-05 22:30:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:08,322 INFO L225 Difference]: With dead ends: 2030 [2021-06-05 22:30:08,322 INFO L226 Difference]: Without dead ends: 2011 [2021-06-05 22:30:08,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-05 22:30:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1860. [2021-06-05 22:30:08,351 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) [2021-06-05 22:30:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 7847 transitions. [2021-06-05 22:30:08,356 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 7847 transitions. Word has length 29 [2021-06-05 22:30:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:08,356 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 7847 transitions. [2021-06-05 22:30:08,357 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) [2021-06-05 22:30:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 7847 transitions. [2021-06-05 22:30:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:08,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:08,361 INFO L554 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] [2021-06-05 22:30:08,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:30:08,584 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash 312359488, now seen corresponding path program 1 times [2021-06-05 22:30:08,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:08,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697418568] [2021-06-05 22:30:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:08,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:08,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697418568] [2021-06-05 22:30:08,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697418568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:08,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422518454] [2021-06-05 22:30:08,709 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 [2021-06-05 22:30:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:08,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:08,806 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 [2021-06-05 22:30:08,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:08,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:08,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:08,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:30:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:08,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422518454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:08,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:08,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:30:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214382030] [2021-06-05 22:30:08,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:08,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:08,887 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) [2021-06-05 22:30:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:09,064 INFO L93 Difference]: Finished difference Result 2474 states and 10275 transitions. [2021-06-05 22:30:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:09,064 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 [2021-06-05 22:30:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:09,071 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 22:30:09,071 INFO L226 Difference]: Without dead ends: 2455 [2021-06-05 22:30:09,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-05 22:30:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1974. [2021-06-05 22:30:09,108 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) [2021-06-05 22:30:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 8341 transitions. [2021-06-05 22:30:09,114 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 8341 transitions. Word has length 29 [2021-06-05 22:30:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:09,114 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 8341 transitions. [2021-06-05 22:30:09,114 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) [2021-06-05 22:30:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 8341 transitions. [2021-06-05 22:30:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:09,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:09,119 INFO L554 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] [2021-06-05 22:30:09,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:09,329 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:09,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1734714314, now seen corresponding path program 2 times [2021-06-05 22:30:09,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:09,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687841276] [2021-06-05 22:30:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:09,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:09,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687841276] [2021-06-05 22:30:09,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687841276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:09,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667667257] [2021-06-05 22:30:09,439 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 [2021-06-05 22:30:09,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:09,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:09,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:09,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:09,601 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 [2021-06-05 22:30:09,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:09,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:09,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:09,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:09,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667667257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:09,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:09,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:30:09,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997122054] [2021-06-05 22:30:09,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:30:09,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:09,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:30:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:09,760 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) [2021-06-05 22:30:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:10,346 INFO L93 Difference]: Finished difference Result 2637 states and 10901 transitions. [2021-06-05 22:30:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:10,346 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 [2021-06-05 22:30:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:10,351 INFO L225 Difference]: With dead ends: 2637 [2021-06-05 22:30:10,351 INFO L226 Difference]: Without dead ends: 2606 [2021-06-05 22:30:10,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-05 22:30:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1919. [2021-06-05 22:30:10,387 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) [2021-06-05 22:30:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8129 transitions. [2021-06-05 22:30:10,393 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8129 transitions. Word has length 29 [2021-06-05 22:30:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:10,393 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8129 transitions. [2021-06-05 22:30:10,393 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) [2021-06-05 22:30:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8129 transitions. [2021-06-05 22:30:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:10,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:10,398 INFO L554 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] [2021-06-05 22:30:10,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:30:10,613 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:10,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1773592538, now seen corresponding path program 3 times [2021-06-05 22:30:10,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:10,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496716279] [2021-06-05 22:30:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:10,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:10,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496716279] [2021-06-05 22:30:10,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496716279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:10,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556316880] [2021-06-05 22:30:10,709 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 [2021-06-05 22:30:10,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:10,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:10,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:30:10,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:10,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:10,806 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 [2021-06-05 22:30:10,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:10,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:10,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:10,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 22:30:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:10,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556316880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:10,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:10,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:30:10,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749819096] [2021-06-05 22:30:10,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:10,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:10,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:10,935 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) [2021-06-05 22:30:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:11,575 INFO L93 Difference]: Finished difference Result 2442 states and 10230 transitions. [2021-06-05 22:30:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:11,575 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 [2021-06-05 22:30:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:11,580 INFO L225 Difference]: With dead ends: 2442 [2021-06-05 22:30:11,580 INFO L226 Difference]: Without dead ends: 2427 [2021-06-05 22:30:11,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-05 22:30:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1904. [2021-06-05 22:30:11,604 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) [2021-06-05 22:30:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 8073 transitions. [2021-06-05 22:30:11,609 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 8073 transitions. Word has length 29 [2021-06-05 22:30:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:11,610 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 8073 transitions. [2021-06-05 22:30:11,610 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) [2021-06-05 22:30:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 8073 transitions. [2021-06-05 22:30:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:11,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:11,614 INFO L554 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] [2021-06-05 22:30:11,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 22:30:11,837 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash 409541884, now seen corresponding path program 4 times [2021-06-05 22:30:11,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:11,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759340196] [2021-06-05 22:30:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:11,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759340196] [2021-06-05 22:30:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759340196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395362845] [2021-06-05 22:30:11,949 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 [2021-06-05 22:30:11,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:11,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:12,046 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 [2021-06-05 22:30:12,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:12,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:12,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:12,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:30:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:12,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395362845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:12,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:30:12,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238634766] [2021-06-05 22:30:12,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:12,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:12,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:12,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:12,122 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) [2021-06-05 22:30:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:12,291 INFO L93 Difference]: Finished difference Result 2559 states and 10558 transitions. [2021-06-05 22:30:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:12,292 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 [2021-06-05 22:30:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:12,297 INFO L225 Difference]: With dead ends: 2559 [2021-06-05 22:30:12,297 INFO L226 Difference]: Without dead ends: 2540 [2021-06-05 22:30:12,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-06-05 22:30:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2000. [2021-06-05 22:30:12,325 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) [2021-06-05 22:30:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 8487 transitions. [2021-06-05 22:30:12,330 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 8487 transitions. Word has length 29 [2021-06-05 22:30:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:12,330 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 8487 transitions. [2021-06-05 22:30:12,330 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) [2021-06-05 22:30:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 8487 transitions. [2021-06-05 22:30:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:12,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:12,334 INFO L554 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] [2021-06-05 22:30:12,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:12,535 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:12,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1831896710, now seen corresponding path program 5 times [2021-06-05 22:30:12,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:12,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853980962] [2021-06-05 22:30:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:12,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:12,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853980962] [2021-06-05 22:30:12,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853980962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288922169] [2021-06-05 22:30:12,623 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 [2021-06-05 22:30:12,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:12,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:12,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:12,717 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 [2021-06-05 22:30:12,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:12,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:12,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:12,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:30:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:12,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288922169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:12,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:12,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517197161] [2021-06-05 22:30:12,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:30:12,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:12,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:30:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:12,818 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) [2021-06-05 22:30:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:12,964 INFO L93 Difference]: Finished difference Result 2517 states and 10450 transitions. [2021-06-05 22:30:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:12,964 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 [2021-06-05 22:30:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:12,968 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 22:30:12,969 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 22:30:12,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 22:30:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1928. [2021-06-05 22:30:13,001 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) [2021-06-05 22:30:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 8175 transitions. [2021-06-05 22:30:13,006 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 8175 transitions. Word has length 29 [2021-06-05 22:30:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:13,007 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 8175 transitions. [2021-06-05 22:30:13,007 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) [2021-06-05 22:30:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 8175 transitions. [2021-06-05 22:30:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:13,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:13,011 INFO L554 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] [2021-06-05 22:30:13,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 22:30:13,232 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash -768158788, now seen corresponding path program 6 times [2021-06-05 22:30:13,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:13,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221242451] [2021-06-05 22:30:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:13,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221242451] [2021-06-05 22:30:13,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221242451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507349636] [2021-06-05 22:30:13,356 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 [2021-06-05 22:30:13,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:13,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:13,484 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 [2021-06-05 22:30:13,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:13,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:13,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:13,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:13,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507349636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:13,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:13,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:30:13,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682807070] [2021-06-05 22:30:13,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:13,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:13,695 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) [2021-06-05 22:30:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:14,272 INFO L93 Difference]: Finished difference Result 2183 states and 9102 transitions. [2021-06-05 22:30:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:14,273 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 [2021-06-05 22:30:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:14,277 INFO L225 Difference]: With dead ends: 2183 [2021-06-05 22:30:14,277 INFO L226 Difference]: Without dead ends: 2164 [2021-06-05 22:30:14,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:30:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-06-05 22:30:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1916. [2021-06-05 22:30:14,299 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) [2021-06-05 22:30:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 8133 transitions. [2021-06-05 22:30:14,303 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 8133 transitions. Word has length 29 [2021-06-05 22:30:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:14,303 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 8133 transitions. [2021-06-05 22:30:14,303 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) [2021-06-05 22:30:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 8133 transitions. [2021-06-05 22:30:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:14,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:14,307 INFO L554 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] [2021-06-05 22:30:14,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:14,507 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 783680366, now seen corresponding path program 7 times [2021-06-05 22:30:14,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:14,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590708349] [2021-06-05 22:30:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590708349] [2021-06-05 22:30:14,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590708349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171971974] [2021-06-05 22:30:14,619 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 [2021-06-05 22:30:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:14,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:14,724 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 [2021-06-05 22:30:14,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:14,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:14,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:14,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 22:30:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171971974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:14,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249199979] [2021-06-05 22:30:14,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:30:14,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:30:14,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:14,806 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) [2021-06-05 22:30:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:15,025 INFO L93 Difference]: Finished difference Result 2667 states and 11011 transitions. [2021-06-05 22:30:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:15,025 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 [2021-06-05 22:30:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:15,031 INFO L225 Difference]: With dead ends: 2667 [2021-06-05 22:30:15,031 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 22:30:15,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 22:30:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2020. [2021-06-05 22:30:15,067 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) [2021-06-05 22:30:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 8573 transitions. [2021-06-05 22:30:15,073 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 8573 transitions. Word has length 29 [2021-06-05 22:30:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:15,073 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 8573 transitions. [2021-06-05 22:30:15,073 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) [2021-06-05 22:30:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 8573 transitions. [2021-06-05 22:30:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:15,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:15,078 INFO L554 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] [2021-06-05 22:30:15,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:30:15,295 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2088932104, now seen corresponding path program 8 times [2021-06-05 22:30:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:15,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429140358] [2021-06-05 22:30:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:15,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:15,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429140358] [2021-06-05 22:30:15,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429140358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012730876] [2021-06-05 22:30:15,392 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 [2021-06-05 22:30:15,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:15,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:15,510 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 [2021-06-05 22:30:15,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:15,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:15,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:15,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:30:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:15,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012730876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:15,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:30:15,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909270158] [2021-06-05 22:30:15,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:30:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:30:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:15,682 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) [2021-06-05 22:30:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:16,388 INFO L93 Difference]: Finished difference Result 2896 states and 11879 transitions. [2021-06-05 22:30:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:16,389 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 [2021-06-05 22:30:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:16,394 INFO L225 Difference]: With dead ends: 2896 [2021-06-05 22:30:16,394 INFO L226 Difference]: Without dead ends: 2852 [2021-06-05 22:30:16,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-06-05 22:30:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1948. [2021-06-05 22:30:16,425 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) [2021-06-05 22:30:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 8261 transitions. [2021-06-05 22:30:16,430 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 8261 transitions. Word has length 29 [2021-06-05 22:30:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:16,430 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 8261 transitions. [2021-06-05 22:30:16,430 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) [2021-06-05 22:30:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 8261 transitions. [2021-06-05 22:30:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:16,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:16,433 INFO L554 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] [2021-06-05 22:30:16,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:30:16,634 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -394020306, now seen corresponding path program 9 times [2021-06-05 22:30:16,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:16,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158996006] [2021-06-05 22:30:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:16,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158996006] [2021-06-05 22:30:16,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158996006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885232340] [2021-06-05 22:30:16,732 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 [2021-06-05 22:30:16,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:16,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:16,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:16,851 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 [2021-06-05 22:30:16,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:16,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:16,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:16,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:30:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:16,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885232340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:16,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:16,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:30:16,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425426617] [2021-06-05 22:30:16,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:16,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:16,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:16,983 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) [2021-06-05 22:30:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:17,613 INFO L93 Difference]: Finished difference Result 2330 states and 9645 transitions. [2021-06-05 22:30:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:17,613 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 [2021-06-05 22:30:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:17,618 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 22:30:17,618 INFO L226 Difference]: Without dead ends: 2311 [2021-06-05 22:30:17,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:30:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-05 22:30:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1924. [2021-06-05 22:30:17,644 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) [2021-06-05 22:30:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 8159 transitions. [2021-06-05 22:30:17,649 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 8159 transitions. Word has length 29 [2021-06-05 22:30:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:17,649 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 8159 transitions. [2021-06-05 22:30:17,650 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) [2021-06-05 22:30:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 8159 transitions. [2021-06-05 22:30:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:17,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:17,654 INFO L554 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] [2021-06-05 22:30:17,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:17,854 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1761581676, now seen corresponding path program 10 times [2021-06-05 22:30:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:17,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915502141] [2021-06-05 22:30:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:18,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915502141] [2021-06-05 22:30:18,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915502141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610364676] [2021-06-05 22:30:18,020 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 [2021-06-05 22:30:18,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:18,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:18,133 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 [2021-06-05 22:30:18,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:18,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:18,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:18,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-05 22:30:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610364676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:18,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 22:30:18,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212865653] [2021-06-05 22:30:18,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:18,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:18,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:18,201 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) [2021-06-05 22:30:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:18,450 INFO L93 Difference]: Finished difference Result 2053 states and 8574 transitions. [2021-06-05 22:30:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:18,451 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 [2021-06-05 22:30:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:18,456 INFO L225 Difference]: With dead ends: 2053 [2021-06-05 22:30:18,456 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 22:30:18,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 22:30:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1927. [2021-06-05 22:30:18,489 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) [2021-06-05 22:30:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 8164 transitions. [2021-06-05 22:30:18,496 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 8164 transitions. Word has length 29 [2021-06-05 22:30:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:18,496 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 8164 transitions. [2021-06-05 22:30:18,496 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) [2021-06-05 22:30:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 8164 transitions. [2021-06-05 22:30:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:18,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:18,501 INFO L554 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] [2021-06-05 22:30:18,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:18,717 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 15 times [2021-06-05 22:30:18,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:18,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044150511] [2021-06-05 22:30:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044150511] [2021-06-05 22:30:18,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044150511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411578078] [2021-06-05 22:30:18,841 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 [2021-06-05 22:30:18,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:18,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:18,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:18,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:18,975 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 [2021-06-05 22:30:18,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:18,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:18,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:18,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:30:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411578078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:19,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372972745] [2021-06-05 22:30:19,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:19,126 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) [2021-06-05 22:30:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:19,936 INFO L93 Difference]: Finished difference Result 2479 states and 10386 transitions. [2021-06-05 22:30:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:19,937 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 [2021-06-05 22:30:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:19,942 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 22:30:19,942 INFO L226 Difference]: Without dead ends: 2464 [2021-06-05 22:30:19,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-06-05 22:30:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2017. [2021-06-05 22:30:19,967 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) [2021-06-05 22:30:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 8567 transitions. [2021-06-05 22:30:19,971 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 8567 transitions. Word has length 29 [2021-06-05 22:30:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:19,971 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 8567 transitions. [2021-06-05 22:30:19,971 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) [2021-06-05 22:30:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 8567 transitions. [2021-06-05 22:30:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:19,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:19,975 INFO L554 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] [2021-06-05 22:30:20,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 22:30:20,175 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:20,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1416726916, now seen corresponding path program 16 times [2021-06-05 22:30:20,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:20,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969543570] [2021-06-05 22:30:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:20,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:20,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969543570] [2021-06-05 22:30:20,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969543570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:20,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051579428] [2021-06-05 22:30:20,296 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 [2021-06-05 22:30:20,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:20,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:20,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:20,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:20,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:30:20,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:20,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:20,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:20,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-05 22:30:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:20,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051579428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:20,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:20,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:20,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436367047] [2021-06-05 22:30:20,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:20,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:20,584 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) [2021-06-05 22:30:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:21,160 INFO L93 Difference]: Finished difference Result 2677 states and 10974 transitions. [2021-06-05 22:30:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:30:21,161 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 [2021-06-05 22:30:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:21,166 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 22:30:21,166 INFO L226 Difference]: Without dead ends: 2625 [2021-06-05 22:30:21,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-05 22:30:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2077. [2021-06-05 22:30:21,194 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) [2021-06-05 22:30:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 8809 transitions. [2021-06-05 22:30:21,199 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 8809 transitions. Word has length 29 [2021-06-05 22:30:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:21,199 INFO L482 AbstractCegarLoop]: Abstraction has 2077 states and 8809 transitions. [2021-06-05 22:30:21,200 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) [2021-06-05 22:30:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 8809 transitions. [2021-06-05 22:30:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:21,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:21,203 INFO L554 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] [2021-06-05 22:30:21,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:21,404 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 17 times [2021-06-05 22:30:21,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:21,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461906320] [2021-06-05 22:30:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:21,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461906320] [2021-06-05 22:30:21,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461906320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946495259] [2021-06-05 22:30:21,527 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 [2021-06-05 22:30:21,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:21,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:21,653 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 [2021-06-05 22:30:21,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:21,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:21,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:21,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-05 22:30:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946495259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:21,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:30:21,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727681925] [2021-06-05 22:30:21,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:30:21,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:21,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:30:21,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:21,749 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) [2021-06-05 22:30:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:22,177 INFO L93 Difference]: Finished difference Result 2569 states and 10651 transitions. [2021-06-05 22:30:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:22,177 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 [2021-06-05 22:30:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:22,182 INFO L225 Difference]: With dead ends: 2569 [2021-06-05 22:30:22,182 INFO L226 Difference]: Without dead ends: 2539 [2021-06-05 22:30:22,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:30:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-06-05 22:30:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2080. [2021-06-05 22:30:22,208 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) [2021-06-05 22:30:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 8829 transitions. [2021-06-05 22:30:22,213 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 8829 transitions. Word has length 29 [2021-06-05 22:30:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:22,213 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 8829 transitions. [2021-06-05 22:30:22,213 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) [2021-06-05 22:30:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 8829 transitions. [2021-06-05 22:30:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:22,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:22,216 INFO L554 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] [2021-06-05 22:30:22,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 22:30:22,417 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 506860148, now seen corresponding path program 18 times [2021-06-05 22:30:22,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:22,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109717283] [2021-06-05 22:30:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:22,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109717283] [2021-06-05 22:30:22,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109717283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936377181] [2021-06-05 22:30:22,535 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 [2021-06-05 22:30:22,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:22,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:22,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:22,668 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 [2021-06-05 22:30:22,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:22,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:22,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:22,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:30:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936377181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:22,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:22,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437763875] [2021-06-05 22:30:22,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:22,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:22,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:22,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:22,852 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) [2021-06-05 22:30:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:23,546 INFO L93 Difference]: Finished difference Result 2573 states and 10625 transitions. [2021-06-05 22:30:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:23,546 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 [2021-06-05 22:30:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:23,551 INFO L225 Difference]: With dead ends: 2573 [2021-06-05 22:30:23,551 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 22:30:23,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 604.5ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 22:30:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2080. [2021-06-05 22:30:23,577 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) [2021-06-05 22:30:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 8826 transitions. [2021-06-05 22:30:23,581 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 8826 transitions. Word has length 29 [2021-06-05 22:30:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:23,581 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 8826 transitions. [2021-06-05 22:30:23,581 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) [2021-06-05 22:30:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 8826 transitions. [2021-06-05 22:30:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:23,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:23,585 INFO L554 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] [2021-06-05 22:30:23,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 22:30:23,786 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:23,787 INFO L82 PathProgramCache]: Analyzing trace with hash -751315058, now seen corresponding path program 19 times [2021-06-05 22:30:23,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:23,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536588583] [2021-06-05 22:30:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:23,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536588583] [2021-06-05 22:30:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536588583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827231879] [2021-06-05 22:30:23,898 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 [2021-06-05 22:30:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:24,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:30:24,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:24,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:24,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:24,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-05 22:30:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827231879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:24,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:24,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711969825] [2021-06-05 22:30:24,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:24,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:24,153 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) [2021-06-05 22:30:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:24,663 INFO L93 Difference]: Finished difference Result 2713 states and 11103 transitions. [2021-06-05 22:30:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:24,664 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 [2021-06-05 22:30:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:24,669 INFO L225 Difference]: With dead ends: 2713 [2021-06-05 22:30:24,669 INFO L226 Difference]: Without dead ends: 2639 [2021-06-05 22:30:24,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-06-05 22:30:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2120. [2021-06-05 22:30:24,701 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) [2021-06-05 22:30:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 9044 transitions. [2021-06-05 22:30:24,706 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 9044 transitions. Word has length 29 [2021-06-05 22:30:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:24,706 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 9044 transitions. [2021-06-05 22:30:24,706 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) [2021-06-05 22:30:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 9044 transitions. [2021-06-05 22:30:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:24,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:24,710 INFO L554 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] [2021-06-05 22:30:24,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 22:30:24,911 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 20 times [2021-06-05 22:30:24,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:24,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480985406] [2021-06-05 22:30:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:25,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:25,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480985406] [2021-06-05 22:30:25,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480985406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:25,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626831610] [2021-06-05 22:30:25,086 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 [2021-06-05 22:30:25,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:25,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:25,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:25,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:25,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:25,285 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 [2021-06-05 22:30:25,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:25,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:25,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:25,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 22:30:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:25,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626831610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:25,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:25,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:25,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275351902] [2021-06-05 22:30:25,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:25,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:25,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:25,383 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) [2021-06-05 22:30:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:25,806 INFO L93 Difference]: Finished difference Result 2325 states and 9823 transitions. [2021-06-05 22:30:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:30:25,806 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 [2021-06-05 22:30:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:25,811 INFO L225 Difference]: With dead ends: 2325 [2021-06-05 22:30:25,811 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 22:30:25,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:30:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 22:30:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2132. [2021-06-05 22:30:25,835 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) [2021-06-05 22:30:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 9076 transitions. [2021-06-05 22:30:25,840 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 9076 transitions. Word has length 29 [2021-06-05 22:30:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:25,840 INFO L482 AbstractCegarLoop]: Abstraction has 2132 states and 9076 transitions. [2021-06-05 22:30:25,840 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) [2021-06-05 22:30:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 9076 transitions. [2021-06-05 22:30:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:25,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:25,843 INFO L554 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] [2021-06-05 22:30:26,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:30:26,044 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:26,044 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 21 times [2021-06-05 22:30:26,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:26,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918362452] [2021-06-05 22:30:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:26,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918362452] [2021-06-05 22:30:26,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918362452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648728883] [2021-06-05 22:30:26,147 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 [2021-06-05 22:30:26,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:26,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:26,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:26,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:26,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:26,252 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 [2021-06-05 22:30:26,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:26,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:26,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:26,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648728883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:26,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:26,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131144268] [2021-06-05 22:30:26,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:26,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:26,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:26,413 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) [2021-06-05 22:30:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:27,288 INFO L93 Difference]: Finished difference Result 2534 states and 10676 transitions. [2021-06-05 22:30:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:27,289 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 [2021-06-05 22:30:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:27,294 INFO L225 Difference]: With dead ends: 2534 [2021-06-05 22:30:27,294 INFO L226 Difference]: Without dead ends: 2519 [2021-06-05 22:30:27,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 792.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:30:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-05 22:30:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2165. [2021-06-05 22:30:27,319 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) [2021-06-05 22:30:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 9228 transitions. [2021-06-05 22:30:27,323 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 9228 transitions. Word has length 29 [2021-06-05 22:30:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:27,323 INFO L482 AbstractCegarLoop]: Abstraction has 2165 states and 9228 transitions. [2021-06-05 22:30:27,323 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) [2021-06-05 22:30:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 9228 transitions. [2021-06-05 22:30:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:27,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:27,327 INFO L554 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] [2021-06-05 22:30:27,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:30:27,528 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:27,528 INFO L82 PathProgramCache]: Analyzing trace with hash 532560704, now seen corresponding path program 22 times [2021-06-05 22:30:27,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:27,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122057036] [2021-06-05 22:30:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:27,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122057036] [2021-06-05 22:30:27,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122057036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763510137] [2021-06-05 22:30:27,632 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 [2021-06-05 22:30:27,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:27,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:27,733 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 [2021-06-05 22:30:27,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:27,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:27,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:27,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 22:30:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763510137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:27,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:27,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443068887] [2021-06-05 22:30:27,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:27,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:27,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:27,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:27,923 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) [2021-06-05 22:30:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:28,675 INFO L93 Difference]: Finished difference Result 2816 states and 11692 transitions. [2021-06-05 22:30:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:28,676 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 [2021-06-05 22:30:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:28,681 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 22:30:28,681 INFO L226 Difference]: Without dead ends: 2764 [2021-06-05 22:30:28,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:30:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-06-05 22:30:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2221. [2021-06-05 22:30:28,722 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) [2021-06-05 22:30:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 9459 transitions. [2021-06-05 22:30:28,730 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 9459 transitions. Word has length 29 [2021-06-05 22:30:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:28,730 INFO L482 AbstractCegarLoop]: Abstraction has 2221 states and 9459 transitions. [2021-06-05 22:30:28,730 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) [2021-06-05 22:30:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 9459 transitions. [2021-06-05 22:30:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:28,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:28,734 INFO L554 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] [2021-06-05 22:30:28,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 22:30:28,937 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1324674304, now seen corresponding path program 23 times [2021-06-05 22:30:28,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:28,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481067470] [2021-06-05 22:30:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:29,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481067470] [2021-06-05 22:30:29,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481067470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518955848] [2021-06-05 22:30:29,045 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 [2021-06-05 22:30:29,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:29,158 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 [2021-06-05 22:30:29,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:29,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:29,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:29,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 22:30:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518955848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:29,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:30:29,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27686010] [2021-06-05 22:30:29,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:30:29,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:29,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:30:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:29,249 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) [2021-06-05 22:30:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:29,745 INFO L93 Difference]: Finished difference Result 2674 states and 11191 transitions. [2021-06-05 22:30:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:30:29,745 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 [2021-06-05 22:30:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:29,751 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 22:30:29,751 INFO L226 Difference]: Without dead ends: 2644 [2021-06-05 22:30:29,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:30:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-06-05 22:30:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2225. [2021-06-05 22:30:29,779 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) [2021-06-05 22:30:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 9480 transitions. [2021-06-05 22:30:29,786 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 9480 transitions. Word has length 29 [2021-06-05 22:30:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:29,787 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 9480 transitions. [2021-06-05 22:30:29,787 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) [2021-06-05 22:30:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 9480 transitions. [2021-06-05 22:30:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:29,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:29,791 INFO L554 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] [2021-06-05 22:30:30,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:30:30,001 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1838819528, now seen corresponding path program 24 times [2021-06-05 22:30:30,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:30,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125398813] [2021-06-05 22:30:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:30,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125398813] [2021-06-05 22:30:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125398813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254248016] [2021-06-05 22:30:30,102 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 [2021-06-05 22:30:30,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:30,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:30,218 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 [2021-06-05 22:30:30,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:30,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:30,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:30,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:30,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254248016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:30,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:30,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694157767] [2021-06-05 22:30:30,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:30,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:30,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:30,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:30,363 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) [2021-06-05 22:30:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:31,062 INFO L93 Difference]: Finished difference Result 2614 states and 10932 transitions. [2021-06-05 22:30:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:31,062 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 [2021-06-05 22:30:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:31,068 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 22:30:31,068 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 22:30:31,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:30:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 22:30:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2218. [2021-06-05 22:30:31,095 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) [2021-06-05 22:30:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 9456 transitions. [2021-06-05 22:30:31,100 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 9456 transitions. Word has length 29 [2021-06-05 22:30:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:31,100 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 9456 transitions. [2021-06-05 22:30:31,100 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) [2021-06-05 22:30:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 9456 transitions. [2021-06-05 22:30:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:31,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:31,103 INFO L554 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] [2021-06-05 22:30:31,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:31,304 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1197972562, now seen corresponding path program 25 times [2021-06-05 22:30:31,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:31,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197425977] [2021-06-05 22:30:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:31,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197425977] [2021-06-05 22:30:31,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197425977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058763578] [2021-06-05 22:30:31,408 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 [2021-06-05 22:30:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:31,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:31,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:31,517 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 [2021-06-05 22:30:31,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:31,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:31,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:31,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 22:30:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058763578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:31,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:31,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346727265] [2021-06-05 22:30:31,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:31,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:31,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:31,672 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) [2021-06-05 22:30:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:32,396 INFO L93 Difference]: Finished difference Result 2842 states and 11822 transitions. [2021-06-05 22:30:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:32,397 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 [2021-06-05 22:30:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:32,403 INFO L225 Difference]: With dead ends: 2842 [2021-06-05 22:30:32,403 INFO L226 Difference]: Without dead ends: 2771 [2021-06-05 22:30:32,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-06-05 22:30:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2141. [2021-06-05 22:30:32,444 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) [2021-06-05 22:30:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 9118 transitions. [2021-06-05 22:30:32,450 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 9118 transitions. Word has length 29 [2021-06-05 22:30:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:32,451 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 9118 transitions. [2021-06-05 22:30:32,451 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) [2021-06-05 22:30:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 9118 transitions. [2021-06-05 22:30:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:32,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:32,455 INFO L554 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] [2021-06-05 22:30:32,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:32,670 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash -680907206, now seen corresponding path program 26 times [2021-06-05 22:30:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:32,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104176057] [2021-06-05 22:30:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:32,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:32,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104176057] [2021-06-05 22:30:32,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104176057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:32,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008578059] [2021-06-05 22:30:32,779 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 [2021-06-05 22:30:32,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:32,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:32,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:32,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:32,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:32,889 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 [2021-06-05 22:30:32,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:32,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:32,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:32,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008578059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649442348] [2021-06-05 22:30:33,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:33,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:33,056 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) [2021-06-05 22:30:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:34,010 INFO L93 Difference]: Finished difference Result 2748 states and 11494 transitions. [2021-06-05 22:30:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:34,010 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 [2021-06-05 22:30:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:34,017 INFO L225 Difference]: With dead ends: 2748 [2021-06-05 22:30:34,017 INFO L226 Difference]: Without dead ends: 2733 [2021-06-05 22:30:34,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 841.9ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:30:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-06-05 22:30:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2211. [2021-06-05 22:30:34,044 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) [2021-06-05 22:30:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 9438 transitions. [2021-06-05 22:30:34,051 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 9438 transitions. Word has length 29 [2021-06-05 22:30:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:34,052 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 9438 transitions. [2021-06-05 22:30:34,052 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) [2021-06-05 22:30:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 9438 transitions. [2021-06-05 22:30:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:34,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:34,056 INFO L554 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] [2021-06-05 22:30:34,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:34,271 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -869748772, now seen corresponding path program 27 times [2021-06-05 22:30:34,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:34,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935168179] [2021-06-05 22:30:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:34,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:34,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935168179] [2021-06-05 22:30:34,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935168179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:34,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729988670] [2021-06-05 22:30:34,373 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 [2021-06-05 22:30:34,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:34,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:34,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:34,467 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 [2021-06-05 22:30:34,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:34,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:34,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:34,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:34,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729988670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:34,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:34,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518658778] [2021-06-05 22:30:34,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:34,604 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) [2021-06-05 22:30:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:35,304 INFO L93 Difference]: Finished difference Result 2647 states and 11020 transitions. [2021-06-05 22:30:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:35,305 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 [2021-06-05 22:30:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:35,310 INFO L225 Difference]: With dead ends: 2647 [2021-06-05 22:30:35,310 INFO L226 Difference]: Without dead ends: 2638 [2021-06-05 22:30:35,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:30:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-06-05 22:30:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2218. [2021-06-05 22:30:35,340 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) [2021-06-05 22:30:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 9459 transitions. [2021-06-05 22:30:35,345 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 9459 transitions. Word has length 29 [2021-06-05 22:30:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:35,345 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 9459 transitions. [2021-06-05 22:30:35,345 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) [2021-06-05 22:30:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 9459 transitions. [2021-06-05 22:30:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:35,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:35,350 INFO L554 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] [2021-06-05 22:30:35,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 22:30:35,552 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1756825082, now seen corresponding path program 28 times [2021-06-05 22:30:35,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:35,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943042671] [2021-06-05 22:30:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943042671] [2021-06-05 22:30:35,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943042671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431911136] [2021-06-05 22:30:35,659 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 [2021-06-05 22:30:35,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:35,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:35,782 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 [2021-06-05 22:30:35,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:35,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:35,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:35,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 22:30:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431911136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:35,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:35,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732201255] [2021-06-05 22:30:35,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:35,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:35,933 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) [2021-06-05 22:30:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:36,618 INFO L93 Difference]: Finished difference Result 3047 states and 12394 transitions. [2021-06-05 22:30:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:36,618 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 [2021-06-05 22:30:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:36,624 INFO L225 Difference]: With dead ends: 3047 [2021-06-05 22:30:36,624 INFO L226 Difference]: Without dead ends: 2981 [2021-06-05 22:30:36,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-06-05 22:30:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2274. [2021-06-05 22:30:36,653 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) [2021-06-05 22:30:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 9721 transitions. [2021-06-05 22:30:36,658 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 9721 transitions. Word has length 29 [2021-06-05 22:30:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:36,658 INFO L482 AbstractCegarLoop]: Abstraction has 2274 states and 9721 transitions. [2021-06-05 22:30:36,658 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) [2021-06-05 22:30:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 9721 transitions. [2021-06-05 22:30:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:36,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:36,662 INFO L554 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] [2021-06-05 22:30:36,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:36,862 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2127923978, now seen corresponding path program 29 times [2021-06-05 22:30:36,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:36,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050156267] [2021-06-05 22:30:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:36,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050156267] [2021-06-05 22:30:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050156267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056325554] [2021-06-05 22:30:36,968 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 [2021-06-05 22:30:37,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:37,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:37,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:37,069 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 [2021-06-05 22:30:37,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:37,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:37,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:37,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 22:30:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:37,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056325554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:37,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:37,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:30:37,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105333902] [2021-06-05 22:30:37,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:30:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:30:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:37,159 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) [2021-06-05 22:30:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:37,580 INFO L93 Difference]: Finished difference Result 2757 states and 11551 transitions. [2021-06-05 22:30:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:37,580 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 [2021-06-05 22:30:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:37,586 INFO L225 Difference]: With dead ends: 2757 [2021-06-05 22:30:37,586 INFO L226 Difference]: Without dead ends: 2719 [2021-06-05 22:30:37,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:30:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-06-05 22:30:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2235. [2021-06-05 22:30:37,618 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) [2021-06-05 22:30:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 9572 transitions. [2021-06-05 22:30:37,623 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 9572 transitions. Word has length 29 [2021-06-05 22:30:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:37,623 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 9572 transitions. [2021-06-05 22:30:37,623 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) [2021-06-05 22:30:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 9572 transitions. [2021-06-05 22:30:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:37,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:37,627 INFO L554 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] [2021-06-05 22:30:37,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:37,827 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 914526842, now seen corresponding path program 30 times [2021-06-05 22:30:37,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:37,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056253084] [2021-06-05 22:30:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:37,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:37,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056253084] [2021-06-05 22:30:37,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056253084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:37,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374552702] [2021-06-05 22:30:37,940 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 [2021-06-05 22:30:37,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:37,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:38,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:38,054 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 [2021-06-05 22:30:38,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:38,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:38,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:38,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:38,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374552702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:38,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:38,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:38,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55604152] [2021-06-05 22:30:38,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:38,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:38,238 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) [2021-06-05 22:30:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:38,578 INFO L93 Difference]: Finished difference Result 2333 states and 9898 transitions. [2021-06-05 22:30:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:38,579 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 [2021-06-05 22:30:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:38,584 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 22:30:38,584 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 22:30:38,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 22:30:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2232. [2021-06-05 22:30:38,608 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) [2021-06-05 22:30:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 9562 transitions. [2021-06-05 22:30:38,613 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 9562 transitions. Word has length 29 [2021-06-05 22:30:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:38,613 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 9562 transitions. [2021-06-05 22:30:38,614 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) [2021-06-05 22:30:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 9562 transitions. [2021-06-05 22:30:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:38,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:38,617 INFO L554 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] [2021-06-05 22:30:38,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 22:30:38,817 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 11 times [2021-06-05 22:30:38,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:38,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367348035] [2021-06-05 22:30:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:39,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:39,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367348035] [2021-06-05 22:30:39,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367348035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:39,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687689976] [2021-06-05 22:30:39,026 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 [2021-06-05 22:30:39,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:39,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:39,135 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 [2021-06-05 22:30:39,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:39,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:39,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:39,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 22:30:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:39,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687689976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:39,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:39,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:30:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081820341] [2021-06-05 22:30:39,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:39,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:39,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:39,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:39,218 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) [2021-06-05 22:30:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:39,460 INFO L93 Difference]: Finished difference Result 2975 states and 12517 transitions. [2021-06-05 22:30:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:39,460 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 [2021-06-05 22:30:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:39,466 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 22:30:39,466 INFO L226 Difference]: Without dead ends: 2956 [2021-06-05 22:30:39,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:39,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-06-05 22:30:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2412. [2021-06-05 22:30:39,497 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) [2021-06-05 22:30:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 10344 transitions. [2021-06-05 22:30:39,503 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 10344 transitions. Word has length 29 [2021-06-05 22:30:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:39,503 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 10344 transitions. [2021-06-05 22:30:39,503 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) [2021-06-05 22:30:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 10344 transitions. [2021-06-05 22:30:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:39,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:39,506 INFO L554 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] [2021-06-05 22:30:39,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 22:30:39,707 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:39,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 12 times [2021-06-05 22:30:39,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:39,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944901051] [2021-06-05 22:30:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:39,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:39,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944901051] [2021-06-05 22:30:39,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944901051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:39,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264862359] [2021-06-05 22:30:39,867 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 [2021-06-05 22:30:39,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:39,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:39,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:39,974 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 [2021-06-05 22:30:39,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:39,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:39,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:39,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:30:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:40,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264862359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:40,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:40,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886954928] [2021-06-05 22:30:40,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:40,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:40,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:40,114 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) [2021-06-05 22:30:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:40,580 INFO L93 Difference]: Finished difference Result 2833 states and 11900 transitions. [2021-06-05 22:30:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:40,580 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 [2021-06-05 22:30:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:40,586 INFO L225 Difference]: With dead ends: 2833 [2021-06-05 22:30:40,586 INFO L226 Difference]: Without dead ends: 2820 [2021-06-05 22:30:40,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:30:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-05 22:30:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2403. [2021-06-05 22:30:40,632 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) [2021-06-05 22:30:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 10314 transitions. [2021-06-05 22:30:40,638 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 10314 transitions. Word has length 29 [2021-06-05 22:30:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:40,638 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 10314 transitions. [2021-06-05 22:30:40,638 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) [2021-06-05 22:30:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 10314 transitions. [2021-06-05 22:30:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:40,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:40,642 INFO L554 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] [2021-06-05 22:30:40,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 22:30:40,845 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 13 times [2021-06-05 22:30:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:40,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828399453] [2021-06-05 22:30:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:41,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:41,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828399453] [2021-06-05 22:30:41,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828399453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:41,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813442489] [2021-06-05 22:30:41,022 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 [2021-06-05 22:30:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:41,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:41,126 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 [2021-06-05 22:30:41,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:41,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:41,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:41,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-05 22:30:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:41,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813442489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:41,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:41,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:30:41,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518095808] [2021-06-05 22:30:41,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:41,226 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) [2021-06-05 22:30:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:41,471 INFO L93 Difference]: Finished difference Result 2988 states and 12543 transitions. [2021-06-05 22:30:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:41,471 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 [2021-06-05 22:30:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:41,477 INFO L225 Difference]: With dead ends: 2988 [2021-06-05 22:30:41,477 INFO L226 Difference]: Without dead ends: 2960 [2021-06-05 22:30:41,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-06-05 22:30:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2382. [2021-06-05 22:30:41,506 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) [2021-06-05 22:30:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 10222 transitions. [2021-06-05 22:30:41,511 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 10222 transitions. Word has length 29 [2021-06-05 22:30:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:41,512 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 10222 transitions. [2021-06-05 22:30:41,512 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) [2021-06-05 22:30:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 10222 transitions. [2021-06-05 22:30:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:41,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:41,515 INFO L554 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] [2021-06-05 22:30:41,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:41,716 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 14 times [2021-06-05 22:30:41,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:41,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210737185] [2021-06-05 22:30:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:41,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210737185] [2021-06-05 22:30:41,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210737185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490092607] [2021-06-05 22:30:41,899 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 [2021-06-05 22:30:41,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:41,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:42,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:42,002 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 [2021-06-05 22:30:42,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:42,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:42,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:42,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 22:30:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:42,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490092607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:42,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:42,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:42,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751090164] [2021-06-05 22:30:42,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:42,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:42,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:42,149 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) [2021-06-05 22:30:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:42,999 INFO L93 Difference]: Finished difference Result 3041 states and 12875 transitions. [2021-06-05 22:30:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:43,000 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 [2021-06-05 22:30:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:43,006 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 22:30:43,006 INFO L226 Difference]: Without dead ends: 3026 [2021-06-05 22:30:43,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:30:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-05 22:30:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2370. [2021-06-05 22:30:43,035 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) [2021-06-05 22:30:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 10176 transitions. [2021-06-05 22:30:43,041 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 10176 transitions. Word has length 29 [2021-06-05 22:30:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:43,041 INFO L482 AbstractCegarLoop]: Abstraction has 2370 states and 10176 transitions. [2021-06-05 22:30:43,041 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) [2021-06-05 22:30:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 10176 transitions. [2021-06-05 22:30:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:43,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:43,045 INFO L554 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] [2021-06-05 22:30:43,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:43,245 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 15 times [2021-06-05 22:30:43,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268601172] [2021-06-05 22:30:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:43,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:43,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268601172] [2021-06-05 22:30:43,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268601172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:43,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642159874] [2021-06-05 22:30:43,425 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 [2021-06-05 22:30:43,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:43,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:43,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:43,580 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 [2021-06-05 22:30:43,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:43,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:43,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:43,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 22:30:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:43,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642159874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:43,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:43,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:43,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263956441] [2021-06-05 22:30:43,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:43,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:43,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:43,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:43,678 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) [2021-06-05 22:30:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:44,207 INFO L93 Difference]: Finished difference Result 2464 states and 10478 transitions. [2021-06-05 22:30:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:30:44,207 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 [2021-06-05 22:30:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:44,212 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 22:30:44,212 INFO L226 Difference]: Without dead ends: 2449 [2021-06-05 22:30:44,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:30:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-05 22:30:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2364. [2021-06-05 22:30:44,237 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) [2021-06-05 22:30:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 10157 transitions. [2021-06-05 22:30:44,242 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 10157 transitions. Word has length 29 [2021-06-05 22:30:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:44,243 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 10157 transitions. [2021-06-05 22:30:44,243 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) [2021-06-05 22:30:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 10157 transitions. [2021-06-05 22:30:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:44,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:44,246 INFO L554 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] [2021-06-05 22:30:44,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:44,447 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 16 times [2021-06-05 22:30:44,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:44,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509370801] [2021-06-05 22:30:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:44,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:44,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509370801] [2021-06-05 22:30:44,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509370801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199706090] [2021-06-05 22:30:44,616 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 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 [2021-06-05 22:30:44,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:44,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:44,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:44,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:30:44,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:44,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:44,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:44,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 22:30:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:44,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199706090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:44,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:30:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73419900] [2021-06-05 22:30:44,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:44,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:44,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:44,776 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) [2021-06-05 22:30:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:44,943 INFO L93 Difference]: Finished difference Result 2936 states and 12417 transitions. [2021-06-05 22:30:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:44,943 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 [2021-06-05 22:30:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:44,949 INFO L225 Difference]: With dead ends: 2936 [2021-06-05 22:30:44,949 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 22:30:44,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 22:30:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2475. [2021-06-05 22:30:44,996 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) [2021-06-05 22:30:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10641 transitions. [2021-06-05 22:30:45,002 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10641 transitions. Word has length 29 [2021-06-05 22:30:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:45,002 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10641 transitions. [2021-06-05 22:30:45,002 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) [2021-06-05 22:30:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10641 transitions. [2021-06-05 22:30:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:45,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:45,006 INFO L554 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] [2021-06-05 22:30:45,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:45,223 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 17 times [2021-06-05 22:30:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:45,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44555746] [2021-06-05 22:30:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:45,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:45,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44555746] [2021-06-05 22:30:45,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44555746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:45,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405092237] [2021-06-05 22:30:45,383 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 [2021-06-05 22:30:45,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:45,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:45,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:45,470 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 [2021-06-05 22:30:45,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:45,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:45,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:45,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:30:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:45,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405092237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:45,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:45,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:30:45,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904684888] [2021-06-05 22:30:45,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:45,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:45,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:45,560 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) [2021-06-05 22:30:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:45,707 INFO L93 Difference]: Finished difference Result 2952 states and 12454 transitions. [2021-06-05 22:30:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:45,707 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 [2021-06-05 22:30:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:45,713 INFO L225 Difference]: With dead ends: 2952 [2021-06-05 22:30:45,713 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 22:30:45,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 22:30:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-05 22:30:45,747 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) [2021-06-05 22:30:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 10332 transitions. [2021-06-05 22:30:45,755 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 10332 transitions. Word has length 29 [2021-06-05 22:30:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:45,755 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 10332 transitions. [2021-06-05 22:30:45,755 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) [2021-06-05 22:30:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 10332 transitions. [2021-06-05 22:30:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:45,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:45,760 INFO L554 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] [2021-06-05 22:30:45,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 22:30:45,960 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:45,961 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 18 times [2021-06-05 22:30:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:45,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016872743] [2021-06-05 22:30:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:46,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016872743] [2021-06-05 22:30:46,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016872743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886416808] [2021-06-05 22:30:46,127 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 [2021-06-05 22:30:46,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:46,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:46,242 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 [2021-06-05 22:30:46,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:46,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:46,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:46,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:46,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886416808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:46,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:46,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:46,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191644246] [2021-06-05 22:30:46,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:46,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:46,416 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) [2021-06-05 22:30:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:47,092 INFO L93 Difference]: Finished difference Result 2619 states and 11113 transitions. [2021-06-05 22:30:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:47,092 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 [2021-06-05 22:30:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:47,098 INFO L225 Difference]: With dead ends: 2619 [2021-06-05 22:30:47,098 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 22:30:47,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 22:30:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2373. [2021-06-05 22:30:47,124 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) [2021-06-05 22:30:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 10196 transitions. [2021-06-05 22:30:47,130 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 10196 transitions. Word has length 29 [2021-06-05 22:30:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:47,130 INFO L482 AbstractCegarLoop]: Abstraction has 2373 states and 10196 transitions. [2021-06-05 22:30:47,130 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) [2021-06-05 22:30:47,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 10196 transitions. [2021-06-05 22:30:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:47,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:47,154 INFO L554 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] [2021-06-05 22:30:47,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:47,354 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 19 times [2021-06-05 22:30:47,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:47,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533173944] [2021-06-05 22:30:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:47,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:47,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533173944] [2021-06-05 22:30:47,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533173944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:47,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118633088] [2021-06-05 22:30:47,636 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 [2021-06-05 22:30:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:47,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:47,724 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 [2021-06-05 22:30:47,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:47,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:47,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:47,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:30:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:47,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118633088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:47,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:47,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:30:47,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199974448] [2021-06-05 22:30:47,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:47,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:47,846 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) [2021-06-05 22:30:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:48,015 INFO L93 Difference]: Finished difference Result 2980 states and 12477 transitions. [2021-06-05 22:30:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:48,015 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 [2021-06-05 22:30:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:48,021 INFO L225 Difference]: With dead ends: 2980 [2021-06-05 22:30:48,021 INFO L226 Difference]: Without dead ends: 2961 [2021-06-05 22:30:48,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-06-05 22:30:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2469. [2021-06-05 22:30:48,052 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) [2021-06-05 22:30:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 10604 transitions. [2021-06-05 22:30:48,058 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 10604 transitions. Word has length 29 [2021-06-05 22:30:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:48,058 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 10604 transitions. [2021-06-05 22:30:48,058 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) [2021-06-05 22:30:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 10604 transitions. [2021-06-05 22:30:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:48,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:48,062 INFO L554 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] [2021-06-05 22:30:48,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 22:30:48,263 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 20 times [2021-06-05 22:30:48,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:48,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428894336] [2021-06-05 22:30:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:48,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:48,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428894336] [2021-06-05 22:30:48,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428894336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:48,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095658427] [2021-06-05 22:30:48,523 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 [2021-06-05 22:30:48,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:48,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:48,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:48,660 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 [2021-06-05 22:30:48,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:48,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:48,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:48,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:48,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095658427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:48,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:48,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742741856] [2021-06-05 22:30:48,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:48,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:48,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:48,838 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) [2021-06-05 22:30:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:49,440 INFO L93 Difference]: Finished difference Result 2879 states and 12012 transitions. [2021-06-05 22:30:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:30:49,440 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 [2021-06-05 22:30:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:49,446 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 22:30:49,446 INFO L226 Difference]: Without dead ends: 2866 [2021-06-05 22:30:49,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 619.9ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-06-05 22:30:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2469. [2021-06-05 22:30:49,475 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) [2021-06-05 22:30:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 10601 transitions. [2021-06-05 22:30:49,480 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 10601 transitions. Word has length 29 [2021-06-05 22:30:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:49,480 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 10601 transitions. [2021-06-05 22:30:49,480 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) [2021-06-05 22:30:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 10601 transitions. [2021-06-05 22:30:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:49,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:49,485 INFO L554 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] [2021-06-05 22:30:49,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 22:30:49,701 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 32025046, now seen corresponding path program 21 times [2021-06-05 22:30:49,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:49,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759539795] [2021-06-05 22:30:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:49,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:49,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759539795] [2021-06-05 22:30:49,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759539795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:49,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353867744] [2021-06-05 22:30:49,949 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 [2021-06-05 22:30:49,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:49,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:50,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:50,098 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 [2021-06-05 22:30:50,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:50,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:50,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:50,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:50,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353867744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:50,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:50,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:50,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734361718] [2021-06-05 22:30:50,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:50,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:50,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:50,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:50,260 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) [2021-06-05 22:30:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:51,049 INFO L93 Difference]: Finished difference Result 2832 states and 11880 transitions. [2021-06-05 22:30:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:51,049 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 [2021-06-05 22:30:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:51,055 INFO L225 Difference]: With dead ends: 2832 [2021-06-05 22:30:51,055 INFO L226 Difference]: Without dead ends: 2817 [2021-06-05 22:30:51,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-06-05 22:30:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2476. [2021-06-05 22:30:51,094 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) [2021-06-05 22:30:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 10622 transitions. [2021-06-05 22:30:51,100 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 10622 transitions. Word has length 29 [2021-06-05 22:30:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:51,100 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 10622 transitions. [2021-06-05 22:30:51,100 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) [2021-06-05 22:30:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 10622 transitions. [2021-06-05 22:30:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:51,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:51,104 INFO L554 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] [2021-06-05 22:30:51,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:51,305 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:51,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:51,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1748573256, now seen corresponding path program 22 times [2021-06-05 22:30:51,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:51,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505586954] [2021-06-05 22:30:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:51,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:51,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505586954] [2021-06-05 22:30:51,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505586954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:51,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845514888] [2021-06-05 22:30:51,542 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 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 [2021-06-05 22:30:51,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:51,614 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 [2021-06-05 22:30:51,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:51,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:51,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:51,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:30:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:51,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845514888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:51,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:51,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:30:51,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214318377] [2021-06-05 22:30:51,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:51,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:51,703 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) [2021-06-05 22:30:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:51,859 INFO L93 Difference]: Finished difference Result 2938 states and 12363 transitions. [2021-06-05 22:30:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:51,860 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 [2021-06-05 22:30:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:51,865 INFO L225 Difference]: With dead ends: 2938 [2021-06-05 22:30:51,866 INFO L226 Difference]: Without dead ends: 2913 [2021-06-05 22:30:51,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2021-06-05 22:30:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2397. [2021-06-05 22:30:51,895 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) [2021-06-05 22:30:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 10295 transitions. [2021-06-05 22:30:51,900 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 10295 transitions. Word has length 29 [2021-06-05 22:30:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:51,900 INFO L482 AbstractCegarLoop]: Abstraction has 2397 states and 10295 transitions. [2021-06-05 22:30:51,900 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) [2021-06-05 22:30:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 10295 transitions. [2021-06-05 22:30:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:51,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:51,903 INFO L554 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] [2021-06-05 22:30:52,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 22:30:52,111 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2122928432, now seen corresponding path program 23 times [2021-06-05 22:30:52,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:52,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975912868] [2021-06-05 22:30:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:52,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:52,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975912868] [2021-06-05 22:30:52,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975912868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:52,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550154957] [2021-06-05 22:30:52,306 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 [2021-06-05 22:30:52,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:52,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:52,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:30:52,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:52,480 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 [2021-06-05 22:30:52,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:52,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:52,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:52,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-05 22:30:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:52,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550154957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:52,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:52,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 22:30:52,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491965966] [2021-06-05 22:30:52,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:52,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:52,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:52,669 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) [2021-06-05 22:30:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:53,019 INFO L93 Difference]: Finished difference Result 2543 states and 10791 transitions. [2021-06-05 22:30:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:30:53,019 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 [2021-06-05 22:30:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:53,026 INFO L225 Difference]: With dead ends: 2543 [2021-06-05 22:30:53,026 INFO L226 Difference]: Without dead ends: 2524 [2021-06-05 22:30:53,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 372.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-06-05 22:30:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2394. [2021-06-05 22:30:53,064 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) [2021-06-05 22:30:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 10286 transitions. [2021-06-05 22:30:53,071 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 10286 transitions. Word has length 29 [2021-06-05 22:30:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:53,071 INFO L482 AbstractCegarLoop]: Abstraction has 2394 states and 10286 transitions. [2021-06-05 22:30:53,071 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) [2021-06-05 22:30:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 10286 transitions. [2021-06-05 22:30:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:53,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:53,076 INFO L554 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] [2021-06-05 22:30:53,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:53,297 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash 837938, now seen corresponding path program 1 times [2021-06-05 22:30:53,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:53,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543019661] [2021-06-05 22:30:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:53,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:53,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543019661] [2021-06-05 22:30:53,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543019661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948497212] [2021-06-05 22:30:53,490 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 [2021-06-05 22:30:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:53,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:53,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:53,624 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 [2021-06-05 22:30:53,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:53,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:53,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:53,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-05 22:30:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:53,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948497212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:53,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:30:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790158253] [2021-06-05 22:30:53,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:53,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:53,681 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) [2021-06-05 22:30:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:53,990 INFO L93 Difference]: Finished difference Result 2646 states and 11184 transitions. [2021-06-05 22:30:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:53,990 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 [2021-06-05 22:30:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:53,995 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 22:30:53,996 INFO L226 Difference]: Without dead ends: 2627 [2021-06-05 22:30:53,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-06-05 22:30:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2496. [2021-06-05 22:30:54,023 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) [2021-06-05 22:30:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 10697 transitions. [2021-06-05 22:30:54,029 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 10697 transitions. Word has length 29 [2021-06-05 22:30:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:54,029 INFO L482 AbstractCegarLoop]: Abstraction has 2496 states and 10697 transitions. [2021-06-05 22:30:54,029 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) [2021-06-05 22:30:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 10697 transitions. [2021-06-05 22:30:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:54,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:54,033 INFO L554 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] [2021-06-05 22:30:54,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 22:30:54,233 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:54,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash -3932270, now seen corresponding path program 1 times [2021-06-05 22:30:54,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:54,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508894091] [2021-06-05 22:30:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:54,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508894091] [2021-06-05 22:30:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508894091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208997582] [2021-06-05 22:30:54,465 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 [2021-06-05 22:30:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:54,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:54,629 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 [2021-06-05 22:30:54,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:54,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:54,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:54,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-05 22:30:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:54,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208997582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:54,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:54,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:30:54,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950696283] [2021-06-05 22:30:54,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:30:54,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:54,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:30:54,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:54,685 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) [2021-06-05 22:30:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:55,124 INFO L93 Difference]: Finished difference Result 2655 states and 11205 transitions. [2021-06-05 22:30:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:55,124 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 [2021-06-05 22:30:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:55,131 INFO L225 Difference]: With dead ends: 2655 [2021-06-05 22:30:55,131 INFO L226 Difference]: Without dead ends: 2636 [2021-06-05 22:30:55,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-06-05 22:30:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2498. [2021-06-05 22:30:55,171 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) [2021-06-05 22:30:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 10705 transitions. [2021-06-05 22:30:55,179 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 10705 transitions. Word has length 29 [2021-06-05 22:30:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:55,180 INFO L482 AbstractCegarLoop]: Abstraction has 2498 states and 10705 transitions. [2021-06-05 22:30:55,180 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) [2021-06-05 22:30:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 10705 transitions. [2021-06-05 22:30:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:55,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:55,185 INFO L554 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] [2021-06-05 22:30:55,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:55,409 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1006933494, now seen corresponding path program 2 times [2021-06-05 22:30:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:55,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392562605] [2021-06-05 22:30:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:55,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392562605] [2021-06-05 22:30:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392562605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431262736] [2021-06-05 22:30:55,617 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 [2021-06-05 22:30:55,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:55,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:55,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:55,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:55,776 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 [2021-06-05 22:30:55,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:55,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:55,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:55,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 22:30:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431262736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:55,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:30:55,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563552972] [2021-06-05 22:30:55,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:30:55,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:55,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:30:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:55,966 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) [2021-06-05 22:30:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:56,790 INFO L93 Difference]: Finished difference Result 2861 states and 12082 transitions. [2021-06-05 22:30:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:56,791 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 [2021-06-05 22:30:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:56,797 INFO L225 Difference]: With dead ends: 2861 [2021-06-05 22:30:56,797 INFO L226 Difference]: Without dead ends: 2842 [2021-06-05 22:30:56,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 796.5ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-06-05 22:30:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2528. [2021-06-05 22:30:56,826 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) [2021-06-05 22:30:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 10841 transitions. [2021-06-05 22:30:56,832 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 10841 transitions. Word has length 29 [2021-06-05 22:30:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:56,832 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 10841 transitions. [2021-06-05 22:30:56,832 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) [2021-06-05 22:30:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 10841 transitions. [2021-06-05 22:30:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:56,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:56,836 INFO L554 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] [2021-06-05 22:30:57,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 22:30:57,037 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:57,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:57,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1570530918, now seen corresponding path program 3 times [2021-06-05 22:30:57,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:57,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314021481] [2021-06-05 22:30:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:57,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:57,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314021481] [2021-06-05 22:30:57,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314021481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:57,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81912988] [2021-06-05 22:30:57,240 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 [2021-06-05 22:30:57,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:57,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:57,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:57,387 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 [2021-06-05 22:30:57,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:57,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:57,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:57,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:30:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:57,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81912988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:57,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:57,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:30:57,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080159573] [2021-06-05 22:30:57,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:30:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:30:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:57,490 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) [2021-06-05 22:30:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:58,299 INFO L93 Difference]: Finished difference Result 3104 states and 12900 transitions. [2021-06-05 22:30:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:58,299 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 [2021-06-05 22:30:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:58,305 INFO L225 Difference]: With dead ends: 3104 [2021-06-05 22:30:58,305 INFO L226 Difference]: Without dead ends: 3066 [2021-06-05 22:30:58,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:30:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-06-05 22:30:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2598. [2021-06-05 22:30:58,338 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) [2021-06-05 22:30:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 11144 transitions. [2021-06-05 22:30:58,344 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 11144 transitions. Word has length 29 [2021-06-05 22:30:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:58,345 INFO L482 AbstractCegarLoop]: Abstraction has 2598 states and 11144 transitions. [2021-06-05 22:30:58,345 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) [2021-06-05 22:30:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 11144 transitions. [2021-06-05 22:30:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:58,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:58,349 INFO L554 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] [2021-06-05 22:30:58,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:58,549 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:58,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1941755924, now seen corresponding path program 4 times [2021-06-05 22:30:58,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:58,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502296403] [2021-06-05 22:30:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:58,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502296403] [2021-06-05 22:30:58,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502296403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322227216] [2021-06-05 22:30:58,723 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 [2021-06-05 22:30:58,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:58,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:58,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:58,838 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 [2021-06-05 22:30:58,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:58,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:58,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:58,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 22:30:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:58,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322227216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:58,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 22:30:58,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574518382] [2021-06-05 22:30:58,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:30:58,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:30:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:58,897 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) [2021-06-05 22:30:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:59,232 INFO L93 Difference]: Finished difference Result 3138 states and 13215 transitions. [2021-06-05 22:30:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:59,233 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 [2021-06-05 22:30:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:59,239 INFO L225 Difference]: With dead ends: 3138 [2021-06-05 22:30:59,239 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 22:30:59,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 22:30:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2607. [2021-06-05 22:30:59,273 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) [2021-06-05 22:30:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 11171 transitions. [2021-06-05 22:30:59,279 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 11171 transitions. Word has length 29 [2021-06-05 22:30:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:59,279 INFO L482 AbstractCegarLoop]: Abstraction has 2607 states and 11171 transitions. [2021-06-05 22:30:59,279 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) [2021-06-05 22:30:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 11171 transitions. [2021-06-05 22:30:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:30:59,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:59,284 INFO L554 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] [2021-06-05 22:30:59,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 22:30:59,484 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash 684817930, now seen corresponding path program 5 times [2021-06-05 22:30:59,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:59,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884460002] [2021-06-05 22:30:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:59,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884460002] [2021-06-05 22:30:59,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884460002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75025060] [2021-06-05 22:30:59,645 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 [2021-06-05 22:30:59,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:59,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:59,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:59,765 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 [2021-06-05 22:30:59,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:59,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:59,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:59,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 22:30:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:59,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75025060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:59,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:59,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 22:30:59,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261800367] [2021-06-05 22:30:59,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:30:59,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:30:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:59,837 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) [2021-06-05 22:31:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:00,123 INFO L93 Difference]: Finished difference Result 3151 states and 13265 transitions. [2021-06-05 22:31:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:31:00,124 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 [2021-06-05 22:31:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:00,130 INFO L225 Difference]: With dead ends: 3151 [2021-06-05 22:31:00,130 INFO L226 Difference]: Without dead ends: 3125 [2021-06-05 22:31:00,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-06-05 22:31:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2512. [2021-06-05 22:31:00,160 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) [2021-06-05 22:31:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 10792 transitions. [2021-06-05 22:31:00,165 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 10792 transitions. Word has length 29 [2021-06-05 22:31:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:00,166 INFO L482 AbstractCegarLoop]: Abstraction has 2512 states and 10792 transitions. [2021-06-05 22:31:00,166 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) [2021-06-05 22:31:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 10792 transitions. [2021-06-05 22:31:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:00,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:00,169 INFO L554 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] [2021-06-05 22:31:00,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:00,373 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:00,373 INFO L82 PathProgramCache]: Analyzing trace with hash -420261250, now seen corresponding path program 2 times [2021-06-05 22:31:00,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:00,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223025560] [2021-06-05 22:31:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:00,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:00,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223025560] [2021-06-05 22:31:00,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223025560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:00,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074519531] [2021-06-05 22:31:00,470 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 [2021-06-05 22:31:00,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:00,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:00,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:00,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:00,601 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 [2021-06-05 22:31:00,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:00,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:00,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:00,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:31:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:00,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074519531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:00,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:00,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:31:00,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640809225] [2021-06-05 22:31:00,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:00,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:00,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:00,723 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) [2021-06-05 22:31:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:01,400 INFO L93 Difference]: Finished difference Result 3043 states and 12775 transitions. [2021-06-05 22:31:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:01,401 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 [2021-06-05 22:31:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:01,407 INFO L225 Difference]: With dead ends: 3043 [2021-06-05 22:31:01,407 INFO L226 Difference]: Without dead ends: 3024 [2021-06-05 22:31:01,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:31:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-06-05 22:31:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2542. [2021-06-05 22:31:01,438 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) [2021-06-05 22:31:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 10918 transitions. [2021-06-05 22:31:01,444 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 10918 transitions. Word has length 29 [2021-06-05 22:31:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:01,444 INFO L482 AbstractCegarLoop]: Abstraction has 2542 states and 10918 transitions. [2021-06-05 22:31:01,444 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) [2021-06-05 22:31:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 10918 transitions. [2021-06-05 22:31:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:01,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:01,448 INFO L554 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] [2021-06-05 22:31:01,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 22:31:01,653 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash 555510786, now seen corresponding path program 3 times [2021-06-05 22:31:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:01,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425303114] [2021-06-05 22:31:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:01,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:01,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425303114] [2021-06-05 22:31:01,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425303114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:01,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194420140] [2021-06-05 22:31:01,761 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 [2021-06-05 22:31:01,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:31:01,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:01,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:01,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:01,954 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 [2021-06-05 22:31:01,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:01,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:01,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:01,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:31:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:02,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194420140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:02,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:02,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:31:02,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531074447] [2021-06-05 22:31:02,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:02,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:02,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:02,083 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) [2021-06-05 22:31:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:02,811 INFO L93 Difference]: Finished difference Result 3597 states and 14864 transitions. [2021-06-05 22:31:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:02,811 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 [2021-06-05 22:31:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:02,818 INFO L225 Difference]: With dead ends: 3597 [2021-06-05 22:31:02,818 INFO L226 Difference]: Without dead ends: 3559 [2021-06-05 22:31:02,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-06-05 22:31:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2634. [2021-06-05 22:31:02,853 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) [2021-06-05 22:31:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 11311 transitions. [2021-06-05 22:31:02,858 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 11311 transitions. Word has length 29 [2021-06-05 22:31:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:02,859 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 11311 transitions. [2021-06-05 22:31:02,859 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) [2021-06-05 22:31:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 11311 transitions. [2021-06-05 22:31:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:02,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:02,862 INFO L554 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] [2021-06-05 22:31:03,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 22:31:03,063 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1977865612, now seen corresponding path program 4 times [2021-06-05 22:31:03,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:03,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334584332] [2021-06-05 22:31:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:03,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:03,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334584332] [2021-06-05 22:31:03,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334584332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:03,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051557076] [2021-06-05 22:31:03,159 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 [2021-06-05 22:31:03,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:03,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:03,249 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 [2021-06-05 22:31:03,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:03,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:03,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:03,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 22:31:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:03,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051557076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:03,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:03,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 22:31:03,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811248893] [2021-06-05 22:31:03,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:31:03,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:03,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:31:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:03,290 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) [2021-06-05 22:31:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:03,554 INFO L93 Difference]: Finished difference Result 3229 states and 13604 transitions. [2021-06-05 22:31:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:31:03,554 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 [2021-06-05 22:31:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:03,560 INFO L225 Difference]: With dead ends: 3229 [2021-06-05 22:31:03,561 INFO L226 Difference]: Without dead ends: 3198 [2021-06-05 22:31:03,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-06-05 22:31:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2494. [2021-06-05 22:31:03,593 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) [2021-06-05 22:31:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 10729 transitions. [2021-06-05 22:31:03,598 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 10729 transitions. Word has length 29 [2021-06-05 22:31:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:03,598 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 10729 transitions. [2021-06-05 22:31:03,598 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) [2021-06-05 22:31:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 10729 transitions. [2021-06-05 22:31:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:03,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:03,602 INFO L554 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] [2021-06-05 22:31:03,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 22:31:03,802 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:03,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 6 times [2021-06-05 22:31:03,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:03,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574091873] [2021-06-05 22:31:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:03,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:03,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574091873] [2021-06-05 22:31:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574091873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:03,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849133579] [2021-06-05 22:31:03,960 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 [2021-06-05 22:31:04,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:04,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:31:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:04,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:04,072 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 [2021-06-05 22:31:04,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:04,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:04,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:04,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 22:31:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:04,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849133579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:04,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:04,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:04,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235137614] [2021-06-05 22:31:04,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:04,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:04,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:04,211 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) [2021-06-05 22:31:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:05,076 INFO L93 Difference]: Finished difference Result 3192 states and 13404 transitions. [2021-06-05 22:31:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:05,076 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 [2021-06-05 22:31:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:05,083 INFO L225 Difference]: With dead ends: 3192 [2021-06-05 22:31:05,083 INFO L226 Difference]: Without dead ends: 3173 [2021-06-05 22:31:05,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:31:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2021-06-05 22:31:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 2594. [2021-06-05 22:31:05,113 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) [2021-06-05 22:31:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 11161 transitions. [2021-06-05 22:31:05,119 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 11161 transitions. Word has length 29 [2021-06-05 22:31:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:05,119 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 11161 transitions. [2021-06-05 22:31:05,119 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) [2021-06-05 22:31:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 11161 transitions. [2021-06-05 22:31:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:05,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:05,122 INFO L554 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] [2021-06-05 22:31:05,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:05,323 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 7 times [2021-06-05 22:31:05,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:05,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744203182] [2021-06-05 22:31:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:05,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744203182] [2021-06-05 22:31:05,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744203182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409984768] [2021-06-05 22:31:05,465 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 [2021-06-05 22:31:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:05,548 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 [2021-06-05 22:31:05,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:05,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:05,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:05,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:31:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409984768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:05,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 22:31:05,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772508398] [2021-06-05 22:31:05,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:31:05,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:31:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:31:05,622 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) [2021-06-05 22:31:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:05,810 INFO L93 Difference]: Finished difference Result 3054 states and 12848 transitions. [2021-06-05 22:31:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:31:05,811 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 [2021-06-05 22:31:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:05,816 INFO L225 Difference]: With dead ends: 3054 [2021-06-05 22:31:05,817 INFO L226 Difference]: Without dead ends: 3039 [2021-06-05 22:31:05,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-06-05 22:31:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2606. [2021-06-05 22:31:05,848 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) [2021-06-05 22:31:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 11197 transitions. [2021-06-05 22:31:05,854 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 11197 transitions. Word has length 29 [2021-06-05 22:31:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:05,854 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 11197 transitions. [2021-06-05 22:31:05,854 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) [2021-06-05 22:31:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 11197 transitions. [2021-06-05 22:31:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:05,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:05,859 INFO L554 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] [2021-06-05 22:31:06,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:06,061 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 8 times [2021-06-05 22:31:06,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:06,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308329462] [2021-06-05 22:31:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:06,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:06,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308329462] [2021-06-05 22:31:06,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308329462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:06,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906279840] [2021-06-05 22:31:06,207 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 [2021-06-05 22:31:06,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:06,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:06,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:06,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:06,317 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 [2021-06-05 22:31:06,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:06,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:06,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:06,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906279840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:06,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:06,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:31:06,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515251193] [2021-06-05 22:31:06,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:06,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:06,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:06,458 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) [2021-06-05 22:31:07,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:07,119 INFO L93 Difference]: Finished difference Result 2958 states and 12432 transitions. [2021-06-05 22:31:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:07,120 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 [2021-06-05 22:31:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:07,126 INFO L225 Difference]: With dead ends: 2958 [2021-06-05 22:31:07,126 INFO L226 Difference]: Without dead ends: 2944 [2021-06-05 22:31:07,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-06-05 22:31:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2599. [2021-06-05 22:31:07,160 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) [2021-06-05 22:31:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 11173 transitions. [2021-06-05 22:31:07,166 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 11173 transitions. Word has length 29 [2021-06-05 22:31:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:07,166 INFO L482 AbstractCegarLoop]: Abstraction has 2599 states and 11173 transitions. [2021-06-05 22:31:07,166 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) [2021-06-05 22:31:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 11173 transitions. [2021-06-05 22:31:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:07,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:07,171 INFO L554 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] [2021-06-05 22:31:07,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:07,371 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 9 times [2021-06-05 22:31:07,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:07,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021771925] [2021-06-05 22:31:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:07,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:07,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021771925] [2021-06-05 22:31:07,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021771925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:07,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252272959] [2021-06-05 22:31:07,527 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 [2021-06-05 22:31:07,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:07,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:07,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:31:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:07,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:07,632 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 [2021-06-05 22:31:07,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:07,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:07,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:07,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 22:31:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:07,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252272959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:07,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:07,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:31:07,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330066513] [2021-06-05 22:31:07,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:07,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:07,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:07,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:07,748 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) [2021-06-05 22:31:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:08,291 INFO L93 Difference]: Finished difference Result 3121 states and 13032 transitions. [2021-06-05 22:31:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:08,291 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 [2021-06-05 22:31:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:08,298 INFO L225 Difference]: With dead ends: 3121 [2021-06-05 22:31:08,298 INFO L226 Difference]: Without dead ends: 3098 [2021-06-05 22:31:08,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-06-05 22:31:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2536. [2021-06-05 22:31:08,328 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) [2021-06-05 22:31:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 10894 transitions. [2021-06-05 22:31:08,333 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 10894 transitions. Word has length 29 [2021-06-05 22:31:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:08,333 INFO L482 AbstractCegarLoop]: Abstraction has 2536 states and 10894 transitions. [2021-06-05 22:31:08,333 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) [2021-06-05 22:31:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 10894 transitions. [2021-06-05 22:31:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:08,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:08,337 INFO L554 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] [2021-06-05 22:31:08,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 22:31:08,541 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 10 times [2021-06-05 22:31:08,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:08,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039004288] [2021-06-05 22:31:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:08,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:08,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039004288] [2021-06-05 22:31:08,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039004288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:08,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31281027] [2021-06-05 22:31:08,685 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 [2021-06-05 22:31:08,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:08,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:08,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:08,760 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 [2021-06-05 22:31:08,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:08,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:08,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:08,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 22:31:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:08,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31281027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:08,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:08,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:31:08,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424665120] [2021-06-05 22:31:08,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:31:08,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:31:08,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:31:08,850 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) [2021-06-05 22:31:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:09,080 INFO L93 Difference]: Finished difference Result 2645 states and 11262 transitions. [2021-06-05 22:31:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:31:09,080 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 [2021-06-05 22:31:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:09,112 INFO L225 Difference]: With dead ends: 2645 [2021-06-05 22:31:09,112 INFO L226 Difference]: Without dead ends: 2630 [2021-06-05 22:31:09,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-06-05 22:31:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2536. [2021-06-05 22:31:09,138 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) [2021-06-05 22:31:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 10894 transitions. [2021-06-05 22:31:09,144 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 10894 transitions. Word has length 29 [2021-06-05 22:31:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:09,144 INFO L482 AbstractCegarLoop]: Abstraction has 2536 states and 10894 transitions. [2021-06-05 22:31:09,144 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) [2021-06-05 22:31:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 10894 transitions. [2021-06-05 22:31:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:09,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:09,149 INFO L554 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] [2021-06-05 22:31:09,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:09,353 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 11 times [2021-06-05 22:31:09,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:09,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943766094] [2021-06-05 22:31:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:09,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943766094] [2021-06-05 22:31:09,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943766094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102905039] [2021-06-05 22:31:09,499 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 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 [2021-06-05 22:31:09,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:09,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:09,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:31:09,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:09,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:09,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:09,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 22:31:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:09,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102905039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:09,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:09,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 22:31:09,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622683891] [2021-06-05 22:31:09,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:31:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:31:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:31:09,684 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) [2021-06-05 22:31:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:09,931 INFO L93 Difference]: Finished difference Result 2988 states and 12674 transitions. [2021-06-05 22:31:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:31:09,931 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 [2021-06-05 22:31:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:09,939 INFO L225 Difference]: With dead ends: 2988 [2021-06-05 22:31:09,939 INFO L226 Difference]: Without dead ends: 2974 [2021-06-05 22:31:09,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2021-06-05 22:31:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2524. [2021-06-05 22:31:09,985 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) [2021-06-05 22:31:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 10858 transitions. [2021-06-05 22:31:09,993 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 10858 transitions. Word has length 29 [2021-06-05 22:31:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:09,994 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 10858 transitions. [2021-06-05 22:31:09,994 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) [2021-06-05 22:31:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 10858 transitions. [2021-06-05 22:31:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:09,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:09,999 INFO L554 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] [2021-06-05 22:31:10,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:10,213 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 12 times [2021-06-05 22:31:10,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:10,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598752021] [2021-06-05 22:31:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:10,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598752021] [2021-06-05 22:31:10,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598752021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:10,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754186199] [2021-06-05 22:31:10,370 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 [2021-06-05 22:31:10,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:31:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:10,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:10,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:10,484 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 [2021-06-05 22:31:10,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:10,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:10,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:10,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:10,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754186199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:10,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:10,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:31:10,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918462245] [2021-06-05 22:31:10,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:31:10,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:10,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:31:10,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:10,642 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) [2021-06-05 22:31:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:11,528 INFO L93 Difference]: Finished difference Result 3051 states and 12761 transitions. [2021-06-05 22:31:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:31:11,529 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 [2021-06-05 22:31:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:11,535 INFO L225 Difference]: With dead ends: 3051 [2021-06-05 22:31:11,535 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 22:31:11,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:31:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 22:31:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2621. [2021-06-05 22:31:11,567 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) [2021-06-05 22:31:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11287 transitions. [2021-06-05 22:31:11,572 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11287 transitions. Word has length 29 [2021-06-05 22:31:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:11,572 INFO L482 AbstractCegarLoop]: Abstraction has 2621 states and 11287 transitions. [2021-06-05 22:31:11,573 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) [2021-06-05 22:31:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11287 transitions. [2021-06-05 22:31:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:11,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:11,577 INFO L554 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] [2021-06-05 22:31:11,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:11,777 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 13 times [2021-06-05 22:31:11,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:11,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71553329] [2021-06-05 22:31:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:11,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71553329] [2021-06-05 22:31:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71553329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040256306] [2021-06-05 22:31:11,949 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 [2021-06-05 22:31:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:12,022 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 [2021-06-05 22:31:12,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:12,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:12,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:12,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:31:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:12,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040256306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:12,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:12,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 22:31:12,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94273880] [2021-06-05 22:31:12,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:31:12,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:31:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:31:12,094 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) [2021-06-05 22:31:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:12,318 INFO L93 Difference]: Finished difference Result 3084 states and 13046 transitions. [2021-06-05 22:31:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:31:12,318 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 [2021-06-05 22:31:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:12,324 INFO L225 Difference]: With dead ends: 3084 [2021-06-05 22:31:12,324 INFO L226 Difference]: Without dead ends: 3069 [2021-06-05 22:31:12,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-05 22:31:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2633. [2021-06-05 22:31:12,353 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) [2021-06-05 22:31:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 11324 transitions. [2021-06-05 22:31:12,358 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 11324 transitions. Word has length 29 [2021-06-05 22:31:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:12,358 INFO L482 AbstractCegarLoop]: Abstraction has 2633 states and 11324 transitions. [2021-06-05 22:31:12,358 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) [2021-06-05 22:31:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 11324 transitions. [2021-06-05 22:31:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:12,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:12,362 INFO L554 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] [2021-06-05 22:31:12,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 22:31:12,562 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 14 times [2021-06-05 22:31:12,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:12,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130387024] [2021-06-05 22:31:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:12,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:12,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130387024] [2021-06-05 22:31:12,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130387024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:12,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154762126] [2021-06-05 22:31:12,694 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 [2021-06-05 22:31:12,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:12,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:12,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:12,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:12,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:12,786 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 [2021-06-05 22:31:12,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:12,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:12,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:12,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:12,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154762126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:12,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:12,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:31:12,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73118438] [2021-06-05 22:31:12,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:12,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:12,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:12,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:12,905 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) [2021-06-05 22:31:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:13,641 INFO L93 Difference]: Finished difference Result 3046 states and 12754 transitions. [2021-06-05 22:31:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:13,642 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 [2021-06-05 22:31:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:13,649 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 22:31:13,650 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 22:31:13,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 22:31:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2626. [2021-06-05 22:31:13,690 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) [2021-06-05 22:31:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 11300 transitions. [2021-06-05 22:31:13,695 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 11300 transitions. Word has length 29 [2021-06-05 22:31:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:13,695 INFO L482 AbstractCegarLoop]: Abstraction has 2626 states and 11300 transitions. [2021-06-05 22:31:13,695 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) [2021-06-05 22:31:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 11300 transitions. [2021-06-05 22:31:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:13,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:13,699 INFO L554 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] [2021-06-05 22:31:13,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:13,899 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 15 times [2021-06-05 22:31:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:13,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632951178] [2021-06-05 22:31:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:14,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632951178] [2021-06-05 22:31:14,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632951178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794023169] [2021-06-05 22:31:14,037 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 [2021-06-05 22:31:14,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:31:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:14,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:14,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:31:14,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:14,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:14,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:14,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794023169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:14,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:14,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:31:14,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373400567] [2021-06-05 22:31:14,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:14,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:14,319 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) [2021-06-05 22:31:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:14,899 INFO L93 Difference]: Finished difference Result 3014 states and 12683 transitions. [2021-06-05 22:31:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:14,899 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 [2021-06-05 22:31:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:14,905 INFO L225 Difference]: With dead ends: 3014 [2021-06-05 22:31:14,905 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 22:31:14,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:31:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 22:31:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2554. [2021-06-05 22:31:14,935 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) [2021-06-05 22:31:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 10994 transitions. [2021-06-05 22:31:14,942 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 10994 transitions. Word has length 29 [2021-06-05 22:31:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:14,942 INFO L482 AbstractCegarLoop]: Abstraction has 2554 states and 10994 transitions. [2021-06-05 22:31:14,942 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) [2021-06-05 22:31:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 10994 transitions. [2021-06-05 22:31:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:14,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:14,946 INFO L554 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] [2021-06-05 22:31:15,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:15,146 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 16 times [2021-06-05 22:31:15,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:15,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598137271] [2021-06-05 22:31:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:15,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:15,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598137271] [2021-06-05 22:31:15,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598137271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:15,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140106959] [2021-06-05 22:31:15,307 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 [2021-06-05 22:31:15,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:15,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:15,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:15,397 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 [2021-06-05 22:31:15,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:15,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:15,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:15,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:31:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:15,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140106959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:15,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:15,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:31:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600916083] [2021-06-05 22:31:15,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:31:15,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:15,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:31:15,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:31:15,489 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) [2021-06-05 22:31:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:15,708 INFO L93 Difference]: Finished difference Result 2689 states and 11475 transitions. [2021-06-05 22:31:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:31:15,709 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 [2021-06-05 22:31:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:15,714 INFO L225 Difference]: With dead ends: 2689 [2021-06-05 22:31:15,714 INFO L226 Difference]: Without dead ends: 2670 [2021-06-05 22:31:15,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-06-05 22:31:15,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2554. [2021-06-05 22:31:15,742 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) [2021-06-05 22:31:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 10994 transitions. [2021-06-05 22:31:15,747 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 10994 transitions. Word has length 29 [2021-06-05 22:31:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:15,748 INFO L482 AbstractCegarLoop]: Abstraction has 2554 states and 10994 transitions. [2021-06-05 22:31:15,748 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) [2021-06-05 22:31:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 10994 transitions. [2021-06-05 22:31:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:15,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:15,751 INFO L554 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] [2021-06-05 22:31:15,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 22:31:15,952 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:15,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 17 times [2021-06-05 22:31:15,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:15,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674628503] [2021-06-05 22:31:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674628503] [2021-06-05 22:31:16,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674628503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478204713] [2021-06-05 22:31:16,082 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 [2021-06-05 22:31:16,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:16,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:16,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:16,160 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 [2021-06-05 22:31:16,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:16,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-06-05 22:31:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478204713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:16,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 22:31:16,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484262807] [2021-06-05 22:31:16,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:16,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:16,273 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) [2021-06-05 22:31:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:16,484 INFO L93 Difference]: Finished difference Result 3041 states and 12849 transitions. [2021-06-05 22:31:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:31:16,484 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 [2021-06-05 22:31:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:16,490 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 22:31:16,490 INFO L226 Difference]: Without dead ends: 3018 [2021-06-05 22:31:16,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-06-05 22:31:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 2524. [2021-06-05 22:31:16,519 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) [2021-06-05 22:31:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 10858 transitions. [2021-06-05 22:31:16,525 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 10858 transitions. Word has length 29 [2021-06-05 22:31:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:16,525 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 10858 transitions. [2021-06-05 22:31:16,525 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) [2021-06-05 22:31:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 10858 transitions. [2021-06-05 22:31:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:16,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:16,528 INFO L554 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] [2021-06-05 22:31:16,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:16,729 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-06-05 22:31:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93216179] [2021-06-05 22:31:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:16,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93216179] [2021-06-05 22:31:16,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93216179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597976888] [2021-06-05 22:31:16,902 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 [2021-06-05 22:31:16,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:16,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:16,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:16,981 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 [2021-06-05 22:31:16,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:16,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:31:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:17,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597976888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:17,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:17,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:31:17,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555468584] [2021-06-05 22:31:17,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:31:17,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:31:17,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:31:17,056 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) [2021-06-05 22:31:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:17,371 INFO L93 Difference]: Finished difference Result 3131 states and 13228 transitions. [2021-06-05 22:31:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:31:17,372 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 [2021-06-05 22:31:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:17,378 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 22:31:17,378 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 22:31:17,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 22:31:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2655. [2021-06-05 22:31:17,410 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) [2021-06-05 22:31:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 11410 transitions. [2021-06-05 22:31:17,416 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 11410 transitions. Word has length 29 [2021-06-05 22:31:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:17,416 INFO L482 AbstractCegarLoop]: Abstraction has 2655 states and 11410 transitions. [2021-06-05 22:31:17,416 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) [2021-06-05 22:31:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 11410 transitions. [2021-06-05 22:31:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:17,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:17,420 INFO L554 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] [2021-06-05 22:31:17,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:17,620 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-06-05 22:31:17,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:17,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194070554] [2021-06-05 22:31:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:17,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:17,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194070554] [2021-06-05 22:31:17,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194070554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:17,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54056230] [2021-06-05 22:31:17,776 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 [2021-06-05 22:31:17,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:17,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:17,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:31:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:17,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:17,882 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 [2021-06-05 22:31:17,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:17,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:17,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:17,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 22:31:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:17,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54056230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:17,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:17,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 22:31:17,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391351753] [2021-06-05 22:31:17,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:17,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:17,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:17,995 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) [2021-06-05 22:31:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:18,483 INFO L93 Difference]: Finished difference Result 3482 states and 14542 transitions. [2021-06-05 22:31:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:18,484 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 [2021-06-05 22:31:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:18,491 INFO L225 Difference]: With dead ends: 3482 [2021-06-05 22:31:18,491 INFO L226 Difference]: Without dead ends: 3451 [2021-06-05 22:31:18,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:31:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2021-06-05 22:31:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 2563. [2021-06-05 22:31:18,526 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) [2021-06-05 22:31:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 11017 transitions. [2021-06-05 22:31:18,532 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 11017 transitions. Word has length 29 [2021-06-05 22:31:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:18,532 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 11017 transitions. [2021-06-05 22:31:18,532 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) [2021-06-05 22:31:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 11017 transitions. [2021-06-05 22:31:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:18,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:18,535 INFO L554 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] [2021-06-05 22:31:18,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:18,736 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-06-05 22:31:18,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:18,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604395535] [2021-06-05 22:31:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:18,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604395535] [2021-06-05 22:31:18,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604395535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352740812] [2021-06-05 22:31:18,869 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 [2021-06-05 22:31:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:18,939 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 [2021-06-05 22:31:18,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:18,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:18,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:18,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:31:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:19,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352740812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:19,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:19,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:31:19,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547797173] [2021-06-05 22:31:19,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:31:19,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:31:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:31:19,030 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) [2021-06-05 22:31:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:19,358 INFO L93 Difference]: Finished difference Result 2681 states and 11419 transitions. [2021-06-05 22:31:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:31:19,358 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 [2021-06-05 22:31:19,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:19,363 INFO L225 Difference]: With dead ends: 2681 [2021-06-05 22:31:19,364 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 22:31:19,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 22:31:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2539. [2021-06-05 22:31:19,392 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) [2021-06-05 22:31:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 10918 transitions. [2021-06-05 22:31:19,397 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 10918 transitions. Word has length 29 [2021-06-05 22:31:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:19,398 INFO L482 AbstractCegarLoop]: Abstraction has 2539 states and 10918 transitions. [2021-06-05 22:31:19,398 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) [2021-06-05 22:31:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 10918 transitions. [2021-06-05 22:31:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:19,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:19,402 INFO L554 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] [2021-06-05 22:31:19,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:19,602 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-06-05 22:31:19,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:19,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651175993] [2021-06-05 22:31:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:19,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651175993] [2021-06-05 22:31:19,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651175993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431217994] [2021-06-05 22:31:19,744 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 [2021-06-05 22:31:19,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:19,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:19,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:31:19,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:19,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:19,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:19,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:19,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431217994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:19,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:19,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:31:19,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688004256] [2021-06-05 22:31:19,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:19,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:19,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:19,972 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) [2021-06-05 22:31:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:21,158 INFO L93 Difference]: Finished difference Result 3321 states and 13753 transitions. [2021-06-05 22:31:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:21,159 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 [2021-06-05 22:31:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:21,165 INFO L225 Difference]: With dead ends: 3321 [2021-06-05 22:31:21,165 INFO L226 Difference]: Without dead ends: 3275 [2021-06-05 22:31:21,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:31:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-06-05 22:31:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 2683. [2021-06-05 22:31:21,196 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) [2021-06-05 22:31:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 11483 transitions. [2021-06-05 22:31:21,202 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 11483 transitions. Word has length 29 [2021-06-05 22:31:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:21,202 INFO L482 AbstractCegarLoop]: Abstraction has 2683 states and 11483 transitions. [2021-06-05 22:31:21,202 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) [2021-06-05 22:31:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 11483 transitions. [2021-06-05 22:31:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:21,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:21,206 INFO L554 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] [2021-06-05 22:31:21,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:21,406 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-06-05 22:31:21,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:21,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816992240] [2021-06-05 22:31:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:21,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:21,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816992240] [2021-06-05 22:31:21,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816992240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:21,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930801361] [2021-06-05 22:31:21,538 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 [2021-06-05 22:31:21,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:21,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:31:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:21,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:21,621 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 [2021-06-05 22:31:21,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:21,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:21,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:21,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 22:31:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:21,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930801361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:21,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:21,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 22:31:21,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961953362] [2021-06-05 22:31:21,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:21,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:21,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:21,734 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) [2021-06-05 22:31:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:22,177 INFO L93 Difference]: Finished difference Result 3482 states and 14556 transitions. [2021-06-05 22:31:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:22,177 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 [2021-06-05 22:31:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:22,184 INFO L225 Difference]: With dead ends: 3482 [2021-06-05 22:31:22,184 INFO L226 Difference]: Without dead ends: 3409 [2021-06-05 22:31:22,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:31:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-06-05 22:31:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2623. [2021-06-05 22:31:22,219 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) [2021-06-05 22:31:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 11281 transitions. [2021-06-05 22:31:22,225 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 11281 transitions. Word has length 29 [2021-06-05 22:31:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:22,225 INFO L482 AbstractCegarLoop]: Abstraction has 2623 states and 11281 transitions. [2021-06-05 22:31:22,225 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) [2021-06-05 22:31:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 11281 transitions. [2021-06-05 22:31:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:22,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:22,230 INFO L554 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] [2021-06-05 22:31:22,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:22,430 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash 794590770, now seen corresponding path program 10 times [2021-06-05 22:31:22,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:22,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445519838] [2021-06-05 22:31:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:22,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445519838] [2021-06-05 22:31:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445519838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119810935] [2021-06-05 22:31:22,553 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 [2021-06-05 22:31:22,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:22,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:22,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:22,624 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 [2021-06-05 22:31:22,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:22,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:22,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:22,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:31:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:22,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119810935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:22,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:22,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 22:31:22,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127507073] [2021-06-05 22:31:22,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:31:22,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:31:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:22,687 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) [2021-06-05 22:31:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:22,941 INFO L93 Difference]: Finished difference Result 2767 states and 11771 transitions. [2021-06-05 22:31:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:31:22,941 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 [2021-06-05 22:31:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:22,946 INFO L225 Difference]: With dead ends: 2767 [2021-06-05 22:31:22,946 INFO L226 Difference]: Without dead ends: 2748 [2021-06-05 22:31:22,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-06-05 22:31:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2620. [2021-06-05 22:31:22,974 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) [2021-06-05 22:31:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 11272 transitions. [2021-06-05 22:31:22,980 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 11272 transitions. Word has length 29 [2021-06-05 22:31:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:22,980 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 11272 transitions. [2021-06-05 22:31:22,980 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) [2021-06-05 22:31:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 11272 transitions. [2021-06-05 22:31:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:22,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:22,984 INFO L554 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] [2021-06-05 22:31:23,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 22:31:23,184 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:23,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 18 times [2021-06-05 22:31:23,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:23,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767769262] [2021-06-05 22:31:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:23,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:23,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767769262] [2021-06-05 22:31:23,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767769262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:23,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064195690] [2021-06-05 22:31:23,258 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 [2021-06-05 22:31:23,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:31:23,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:23,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:23,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:23,348 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 [2021-06-05 22:31:23,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:23,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:23,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:23,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:23,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064195690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:23,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:23,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:31:23,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263994100] [2021-06-05 22:31:23,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:23,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:23,476 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) [2021-06-05 22:31:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:23,949 INFO L93 Difference]: Finished difference Result 3193 states and 13486 transitions. [2021-06-05 22:31:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:23,949 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 [2021-06-05 22:31:23,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:23,956 INFO L225 Difference]: With dead ends: 3193 [2021-06-05 22:31:23,956 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 22:31:23,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:31:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 22:31:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2728. [2021-06-05 22:31:23,989 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) [2021-06-05 22:31:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 11735 transitions. [2021-06-05 22:31:23,995 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 11735 transitions. Word has length 29 [2021-06-05 22:31:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:23,995 INFO L482 AbstractCegarLoop]: Abstraction has 2728 states and 11735 transitions. [2021-06-05 22:31:23,995 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) [2021-06-05 22:31:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 11735 transitions. [2021-06-05 22:31:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:23,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:23,999 INFO L554 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] [2021-06-05 22:31:24,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:24,199 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 19 times [2021-06-05 22:31:24,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:24,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812750789] [2021-06-05 22:31:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:24,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:24,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812750789] [2021-06-05 22:31:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812750789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964821633] [2021-06-05 22:31:24,276 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 [2021-06-05 22:31:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:24,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:24,378 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 [2021-06-05 22:31:24,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:24,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:24,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:24,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-05 22:31:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:24,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964821633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:24,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:24,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-05 22:31:24,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912761850] [2021-06-05 22:31:24,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:31:24,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:31:24,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:31:24,480 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) [2021-06-05 22:31:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:24,715 INFO L93 Difference]: Finished difference Result 3118 states and 13129 transitions. [2021-06-05 22:31:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:31:24,715 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 [2021-06-05 22:31:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:24,722 INFO L225 Difference]: With dead ends: 3118 [2021-06-05 22:31:24,722 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 22:31:24,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 22:31:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2691. [2021-06-05 22:31:24,753 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) [2021-06-05 22:31:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 11587 transitions. [2021-06-05 22:31:24,759 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 11587 transitions. Word has length 29 [2021-06-05 22:31:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:24,759 INFO L482 AbstractCegarLoop]: Abstraction has 2691 states and 11587 transitions. [2021-06-05 22:31:24,759 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) [2021-06-05 22:31:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 11587 transitions. [2021-06-05 22:31:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:24,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:24,763 INFO L554 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] [2021-06-05 22:31:24,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 22:31:24,964 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 20 times [2021-06-05 22:31:24,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:24,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022996616] [2021-06-05 22:31:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:25,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:25,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022996616] [2021-06-05 22:31:25,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022996616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:25,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436165459] [2021-06-05 22:31:25,048 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 [2021-06-05 22:31:25,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:25,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:25,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:25,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:25,155 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 [2021-06-05 22:31:25,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:25,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:25,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:25,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436165459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:25,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:25,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:31:25,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357360553] [2021-06-05 22:31:25,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:25,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:25,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:25,320 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) [2021-06-05 22:31:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:25,894 INFO L93 Difference]: Finished difference Result 2858 states and 12147 transitions. [2021-06-05 22:31:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:25,894 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 [2021-06-05 22:31:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:25,900 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 22:31:25,900 INFO L226 Difference]: Without dead ends: 2843 [2021-06-05 22:31:25,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:31:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2021-06-05 22:31:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2688. [2021-06-05 22:31:25,930 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) [2021-06-05 22:31:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 11578 transitions. [2021-06-05 22:31:25,935 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 11578 transitions. Word has length 29 [2021-06-05 22:31:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:25,936 INFO L482 AbstractCegarLoop]: Abstraction has 2688 states and 11578 transitions. [2021-06-05 22:31:25,936 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) [2021-06-05 22:31:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 11578 transitions. [2021-06-05 22:31:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:25,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:25,939 INFO L554 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] [2021-06-05 22:31:26,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 22:31:26,140 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:26,140 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 21 times [2021-06-05 22:31:26,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:26,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189258905] [2021-06-05 22:31:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:26,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189258905] [2021-06-05 22:31:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189258905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980929368] [2021-06-05 22:31:26,214 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 [2021-06-05 22:31:26,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:26,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:31:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:26,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:26,296 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 [2021-06-05 22:31:26,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:26,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:26,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:26,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 22:31:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:26,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980929368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:26,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:26,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:31:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406899960] [2021-06-05 22:31:26,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:26,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:26,411 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) [2021-06-05 22:31:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:26,928 INFO L93 Difference]: Finished difference Result 3616 states and 15137 transitions. [2021-06-05 22:31:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:26,928 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 [2021-06-05 22:31:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:26,937 INFO L225 Difference]: With dead ends: 3616 [2021-06-05 22:31:26,938 INFO L226 Difference]: Without dead ends: 3597 [2021-06-05 22:31:26,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-06-05 22:31:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2790. [2021-06-05 22:31:26,981 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) [2021-06-05 22:31:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 12023 transitions. [2021-06-05 22:31:26,988 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 12023 transitions. Word has length 29 [2021-06-05 22:31:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:26,988 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 12023 transitions. [2021-06-05 22:31:26,988 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) [2021-06-05 22:31:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 12023 transitions. [2021-06-05 22:31:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:26,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:26,992 INFO L554 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] [2021-06-05 22:31:27,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:27,193 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 22 times [2021-06-05 22:31:27,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:27,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840818001] [2021-06-05 22:31:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:27,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840818001] [2021-06-05 22:31:27,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840818001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204165178] [2021-06-05 22:31:27,277 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 [2021-06-05 22:31:27,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:27,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:27,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:27,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:27,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:31:27,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:27,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:27,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:27,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-06-05 22:31:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204165178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:27,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:27,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-05 22:31:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917958686] [2021-06-05 22:31:27,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:31:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:31:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:31:27,441 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) [2021-06-05 22:31:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:27,707 INFO L93 Difference]: Finished difference Result 3192 states and 13469 transitions. [2021-06-05 22:31:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:31:27,707 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 [2021-06-05 22:31:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:27,713 INFO L225 Difference]: With dead ends: 3192 [2021-06-05 22:31:27,714 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 22:31:27,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 22:31:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2718. [2021-06-05 22:31:27,745 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) [2021-06-05 22:31:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11702 transitions. [2021-06-05 22:31:27,751 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11702 transitions. Word has length 29 [2021-06-05 22:31:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:27,751 INFO L482 AbstractCegarLoop]: Abstraction has 2718 states and 11702 transitions. [2021-06-05 22:31:27,751 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) [2021-06-05 22:31:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11702 transitions. [2021-06-05 22:31:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:27,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:27,755 INFO L554 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] [2021-06-05 22:31:27,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:27,956 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 23 times [2021-06-05 22:31:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:27,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669114294] [2021-06-05 22:31:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669114294] [2021-06-05 22:31:28,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669114294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179744975] [2021-06-05 22:31:28,031 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 [2021-06-05 22:31:28,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:28,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:28,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:28,107 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 [2021-06-05 22:31:28,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:28,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:28,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:28,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 22:31:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179744975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:28,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:31:28,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351585794] [2021-06-05 22:31:28,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:31:28,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:31:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:31:28,152 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) [2021-06-05 22:31:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:28,308 INFO L93 Difference]: Finished difference Result 2847 states and 12154 transitions. [2021-06-05 22:31:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:31:28,309 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 [2021-06-05 22:31:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:28,314 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 22:31:28,314 INFO L226 Difference]: Without dead ends: 2828 [2021-06-05 22:31:28,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-06-05 22:31:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2703. [2021-06-05 22:31:28,343 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) [2021-06-05 22:31:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 11655 transitions. [2021-06-05 22:31:28,350 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 11655 transitions. Word has length 29 [2021-06-05 22:31:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:28,350 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 11655 transitions. [2021-06-05 22:31:28,350 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) [2021-06-05 22:31:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 11655 transitions. [2021-06-05 22:31:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:28,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:28,354 INFO L554 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] [2021-06-05 22:31:28,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:28,554 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-06-05 22:31:28,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:28,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659400288] [2021-06-05 22:31:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:28,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659400288] [2021-06-05 22:31:28,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659400288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144252873] [2021-06-05 22:31:28,636 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 [2021-06-05 22:31:28,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:31:28,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:28,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:28,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:28,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:28,739 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 [2021-06-05 22:31:28,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:28,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:28,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:28,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:31:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144252873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:28,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:31:28,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790904925] [2021-06-05 22:31:28,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:28,850 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) [2021-06-05 22:31:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:29,313 INFO L93 Difference]: Finished difference Result 3325 states and 14048 transitions. [2021-06-05 22:31:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:31:29,314 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 [2021-06-05 22:31:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:29,320 INFO L225 Difference]: With dead ends: 3325 [2021-06-05 22:31:29,321 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 22:31:29,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 22:31:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2810. [2021-06-05 22:31:29,353 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) [2021-06-05 22:31:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 12106 transitions. [2021-06-05 22:31:29,359 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 12106 transitions. Word has length 29 [2021-06-05 22:31:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:29,359 INFO L482 AbstractCegarLoop]: Abstraction has 2810 states and 12106 transitions. [2021-06-05 22:31:29,359 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) [2021-06-05 22:31:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 12106 transitions. [2021-06-05 22:31:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:29,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:29,363 INFO L554 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] [2021-06-05 22:31:29,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 22:31:29,572 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:29,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-06-05 22:31:29,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:29,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941080900] [2021-06-05 22:31:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:29,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941080900] [2021-06-05 22:31:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941080900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484295639] [2021-06-05 22:31:29,649 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 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 [2021-06-05 22:31:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:29,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:29,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:29,726 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 [2021-06-05 22:31:29,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:29,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:29,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:29,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:24 [2021-06-05 22:31:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:29,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484295639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:29,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:29,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-06-05 22:31:29,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127083975] [2021-06-05 22:31:29,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:31:29,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:31:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:29,815 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) [2021-06-05 22:31:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:30,164 INFO L93 Difference]: Finished difference Result 3209 states and 13510 transitions. [2021-06-05 22:31:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:31:30,164 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 [2021-06-05 22:31:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:30,170 INFO L225 Difference]: With dead ends: 3209 [2021-06-05 22:31:30,170 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 22:31:30,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 22:31:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2738. [2021-06-05 22:31:30,205 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) [2021-06-05 22:31:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 11794 transitions. [2021-06-05 22:31:30,211 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 11794 transitions. Word has length 29 [2021-06-05 22:31:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:30,211 INFO L482 AbstractCegarLoop]: Abstraction has 2738 states and 11794 transitions. [2021-06-05 22:31:30,211 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) [2021-06-05 22:31:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 11794 transitions. [2021-06-05 22:31:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:30,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:30,215 INFO L554 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] [2021-06-05 22:31:30,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:30,416 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:30,416 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-06-05 22:31:30,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:30,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060622971] [2021-06-05 22:31:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:30,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:30,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060622971] [2021-06-05 22:31:30,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060622971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:30,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192250863] [2021-06-05 22:31:30,504 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 [2021-06-05 22:31:30,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:30,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:30,631 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 [2021-06-05 22:31:30,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:30,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:30,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:30,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:31:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:30,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192250863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:30,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:30,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:31:30,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990893730] [2021-06-05 22:31:30,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:30,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:30,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:30,766 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) [2021-06-05 22:31:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:31,321 INFO L93 Difference]: Finished difference Result 2966 states and 12573 transitions. [2021-06-05 22:31:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:31,321 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 [2021-06-05 22:31:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:31,327 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 22:31:31,327 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 22:31:31,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:31:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 22:31:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2714. [2021-06-05 22:31:31,356 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) [2021-06-05 22:31:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 11692 transitions. [2021-06-05 22:31:31,361 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 11692 transitions. Word has length 29 [2021-06-05 22:31:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:31,362 INFO L482 AbstractCegarLoop]: Abstraction has 2714 states and 11692 transitions. [2021-06-05 22:31:31,362 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) [2021-06-05 22:31:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 11692 transitions. [2021-06-05 22:31:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:31,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:31,365 INFO L554 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] [2021-06-05 22:31:31,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 22:31:31,566 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-06-05 22:31:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:31,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007107603] [2021-06-05 22:31:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:31,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:31,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007107603] [2021-06-05 22:31:31,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007107603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:31,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316093550] [2021-06-05 22:31:31,660 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 [2021-06-05 22:31:31,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:31:31,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:31,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:31,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:31,841 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 [2021-06-05 22:31:31,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:31,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:31,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:31,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 22:31:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:31,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316093550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:31,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:31,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:31:31,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867146095] [2021-06-05 22:31:31,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:31,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:31,916 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) [2021-06-05 22:31:32,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:32,249 INFO L93 Difference]: Finished difference Result 2853 states and 12150 transitions. [2021-06-05 22:31:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:31:32,249 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 [2021-06-05 22:31:32,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:32,255 INFO L225 Difference]: With dead ends: 2853 [2021-06-05 22:31:32,255 INFO L226 Difference]: Without dead ends: 2838 [2021-06-05 22:31:32,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:31:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-05 22:31:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2722. [2021-06-05 22:31:32,285 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) [2021-06-05 22:31:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11714 transitions. [2021-06-05 22:31:32,292 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11714 transitions. Word has length 29 [2021-06-05 22:31:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:32,292 INFO L482 AbstractCegarLoop]: Abstraction has 2722 states and 11714 transitions. [2021-06-05 22:31:32,292 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) [2021-06-05 22:31:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11714 transitions. [2021-06-05 22:31:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:32,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:32,296 INFO L554 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] [2021-06-05 22:31:32,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:32,496 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-06-05 22:31:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:32,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057676445] [2021-06-05 22:31:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:32,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:32,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057676445] [2021-06-05 22:31:32,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057676445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:32,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552890833] [2021-06-05 22:31:32,634 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 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 [2021-06-05 22:31:32,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:32,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:32,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:32,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:32,720 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 [2021-06-05 22:31:32,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:32,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:32,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:32,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 22:31:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:32,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552890833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:32,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:32,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:31:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877657694] [2021-06-05 22:31:32,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:31:32,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:31:32,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:31:32,776 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) [2021-06-05 22:31:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:33,074 INFO L93 Difference]: Finished difference Result 3419 states and 14437 transitions. [2021-06-05 22:31:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:31:33,074 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 [2021-06-05 22:31:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:33,081 INFO L225 Difference]: With dead ends: 3419 [2021-06-05 22:31:33,081 INFO L226 Difference]: Without dead ends: 3400 [2021-06-05 22:31:33,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-06-05 22:31:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2857. [2021-06-05 22:31:33,119 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) [2021-06-05 22:31:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 12274 transitions. [2021-06-05 22:31:33,125 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 12274 transitions. Word has length 29 [2021-06-05 22:31:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:33,125 INFO L482 AbstractCegarLoop]: Abstraction has 2857 states and 12274 transitions. [2021-06-05 22:31:33,125 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) [2021-06-05 22:31:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 12274 transitions. [2021-06-05 22:31:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:33,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:33,130 INFO L554 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] [2021-06-05 22:31:33,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:33,330 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:33,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-06-05 22:31:33,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:33,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521499839] [2021-06-05 22:31:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:33,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521499839] [2021-06-05 22:31:33,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521499839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054693353] [2021-06-05 22:31:33,466 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 [2021-06-05 22:31:33,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:31:33,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:33,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:33,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:33,575 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 [2021-06-05 22:31:33,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:33,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:33,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:33,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 22:31:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:33,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054693353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:33,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:33,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 22:31:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939691279] [2021-06-05 22:31:33,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:31:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:31:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:33,675 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) [2021-06-05 22:31:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:34,442 INFO L93 Difference]: Finished difference Result 3478 states and 14599 transitions. [2021-06-05 22:31:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:34,443 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 [2021-06-05 22:31:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:34,450 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 22:31:34,450 INFO L226 Difference]: Without dead ends: 3447 [2021-06-05 22:31:34,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 660.1ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:31:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-06-05 22:31:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2777. [2021-06-05 22:31:34,495 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) [2021-06-05 22:31:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 11937 transitions. [2021-06-05 22:31:34,503 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 11937 transitions. Word has length 29 [2021-06-05 22:31:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:34,504 INFO L482 AbstractCegarLoop]: Abstraction has 2777 states and 11937 transitions. [2021-06-05 22:31:34,504 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) [2021-06-05 22:31:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 11937 transitions. [2021-06-05 22:31:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:34,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:34,508 INFO L554 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] [2021-06-05 22:31:34,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 22:31:34,709 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-06-05 22:31:34,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:34,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153521096] [2021-06-05 22:31:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:34,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153521096] [2021-06-05 22:31:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153521096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445999801] [2021-06-05 22:31:34,834 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 [2021-06-05 22:31:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:34,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:34,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:34,931 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 [2021-06-05 22:31:34,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:34,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:34,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:34,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-05 22:31:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:35,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445999801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:35,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:35,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:31:35,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172763780] [2021-06-05 22:31:35,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:31:35,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:31:35,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:31:35,008 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) [2021-06-05 22:31:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:35,277 INFO L93 Difference]: Finished difference Result 2968 states and 12609 transitions. [2021-06-05 22:31:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:31:35,277 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 [2021-06-05 22:31:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:35,283 INFO L225 Difference]: With dead ends: 2968 [2021-06-05 22:31:35,283 INFO L226 Difference]: Without dead ends: 2953 [2021-06-05 22:31:35,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-06-05 22:31:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2765. [2021-06-05 22:31:35,318 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) [2021-06-05 22:31:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 11895 transitions. [2021-06-05 22:31:35,324 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 11895 transitions. Word has length 29 [2021-06-05 22:31:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:35,324 INFO L482 AbstractCegarLoop]: Abstraction has 2765 states and 11895 transitions. [2021-06-05 22:31:35,324 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) [2021-06-05 22:31:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 11895 transitions. [2021-06-05 22:31:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:35,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:35,328 INFO L554 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] [2021-06-05 22:31:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 22:31:35,528 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-06-05 22:31:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:35,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486088148] [2021-06-05 22:31:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:35,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:35,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486088148] [2021-06-05 22:31:35,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486088148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:35,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052740274] [2021-06-05 22:31:35,637 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 [2021-06-05 22:31:35,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:35,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:35,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:35,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:31:35,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:35,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:35,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:35,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 22:31:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:35,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052740274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:35,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:35,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:31:35,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955824206] [2021-06-05 22:31:35,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:35,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:35,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:35,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:35,866 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) [2021-06-05 22:31:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:36,255 INFO L93 Difference]: Finished difference Result 2909 states and 12388 transitions. [2021-06-05 22:31:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:31:36,255 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 [2021-06-05 22:31:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:36,261 INFO L225 Difference]: With dead ends: 2909 [2021-06-05 22:31:36,261 INFO L226 Difference]: Without dead ends: 2894 [2021-06-05 22:31:36,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:31:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-06-05 22:31:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2755. [2021-06-05 22:31:36,297 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) [2021-06-05 22:31:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 11863 transitions. [2021-06-05 22:31:36,303 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 11863 transitions. Word has length 29 [2021-06-05 22:31:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:36,303 INFO L482 AbstractCegarLoop]: Abstraction has 2755 states and 11863 transitions. [2021-06-05 22:31:36,303 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) [2021-06-05 22:31:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 11863 transitions. [2021-06-05 22:31:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:36,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:36,307 INFO L554 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] [2021-06-05 22:31:36,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:36,508 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:36,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-06-05 22:31:36,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:36,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33050133] [2021-06-05 22:31:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:36,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:36,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33050133] [2021-06-05 22:31:36,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33050133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:36,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265061184] [2021-06-05 22:31:36,664 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 [2021-06-05 22:31:36,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:31:36,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:36,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:36,750 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 [2021-06-05 22:31:36,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:36,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:36,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:36,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:36,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265061184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:36,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:36,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:31:36,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798935064] [2021-06-05 22:31:36,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:36,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:36,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:36,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:36,917 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) [2021-06-05 22:31:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:38,101 INFO L93 Difference]: Finished difference Result 3729 states and 15620 transitions. [2021-06-05 22:31:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:31:38,101 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 [2021-06-05 22:31:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:38,109 INFO L225 Difference]: With dead ends: 3729 [2021-06-05 22:31:38,109 INFO L226 Difference]: Without dead ends: 3710 [2021-06-05 22:31:38,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1081.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-06-05 22:31:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 2886. [2021-06-05 22:31:38,151 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) [2021-06-05 22:31:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 12418 transitions. [2021-06-05 22:31:38,158 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 12418 transitions. Word has length 29 [2021-06-05 22:31:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:38,158 INFO L482 AbstractCegarLoop]: Abstraction has 2886 states and 12418 transitions. [2021-06-05 22:31:38,158 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) [2021-06-05 22:31:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 12418 transitions. [2021-06-05 22:31:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:38,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:38,162 INFO L554 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] [2021-06-05 22:31:38,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 22:31:38,362 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-06-05 22:31:38,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:38,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067416264] [2021-06-05 22:31:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:38,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:38,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067416264] [2021-06-05 22:31:38,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067416264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:38,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685975671] [2021-06-05 22:31:38,550 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 [2021-06-05 22:31:38,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:38,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:38,622 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 [2021-06-05 22:31:38,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:38,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:38,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:38,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 22:31:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:38,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685975671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:38,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:38,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:31:38,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774460778] [2021-06-05 22:31:38,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:31:38,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:31:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:31:38,705 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) [2021-06-05 22:31:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:38,983 INFO L93 Difference]: Finished difference Result 3364 states and 14213 transitions. [2021-06-05 22:31:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:31:38,984 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 [2021-06-05 22:31:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:38,991 INFO L225 Difference]: With dead ends: 3364 [2021-06-05 22:31:38,991 INFO L226 Difference]: Without dead ends: 3333 [2021-06-05 22:31:38,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-06-05 22:31:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 2794. [2021-06-05 22:31:39,025 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) [2021-06-05 22:31:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 12025 transitions. [2021-06-05 22:31:39,032 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 12025 transitions. Word has length 29 [2021-06-05 22:31:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:39,032 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 12025 transitions. [2021-06-05 22:31:39,032 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) [2021-06-05 22:31:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 12025 transitions. [2021-06-05 22:31:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:39,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:39,036 INFO L554 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] [2021-06-05 22:31:39,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 22:31:39,236 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:39,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-06-05 22:31:39,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:39,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183791364] [2021-06-05 22:31:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:39,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:39,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183791364] [2021-06-05 22:31:39,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183791364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:39,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827619406] [2021-06-05 22:31:39,369 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 [2021-06-05 22:31:39,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:39,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:39,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:39,440 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 [2021-06-05 22:31:39,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:39,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:39,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:39,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 22:31:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:39,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827619406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:39,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:39,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:31:39,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992529126] [2021-06-05 22:31:39,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:31:39,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:39,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:31:39,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:31:39,529 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) [2021-06-05 22:31:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:39,760 INFO L93 Difference]: Finished difference Result 2916 states and 12446 transitions. [2021-06-05 22:31:39,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:31:39,760 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 [2021-06-05 22:31:39,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:39,766 INFO L225 Difference]: With dead ends: 2916 [2021-06-05 22:31:39,766 INFO L226 Difference]: Without dead ends: 2901 [2021-06-05 22:31:39,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-06-05 22:31:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2764. [2021-06-05 22:31:39,796 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) [2021-06-05 22:31:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 11899 transitions. [2021-06-05 22:31:39,802 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 11899 transitions. Word has length 29 [2021-06-05 22:31:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:39,802 INFO L482 AbstractCegarLoop]: Abstraction has 2764 states and 11899 transitions. [2021-06-05 22:31:39,802 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) [2021-06-05 22:31:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 11899 transitions. [2021-06-05 22:31:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:39,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:39,806 INFO L554 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] [2021-06-05 22:31:40,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 22:31:40,007 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-06-05 22:31:40,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:40,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66249888] [2021-06-05 22:31:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:40,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:40,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66249888] [2021-06-05 22:31:40,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66249888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:40,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898541040] [2021-06-05 22:31:40,158 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 [2021-06-05 22:31:40,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:31:40,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:40,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:40,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:40,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:31:40,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:40,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:40,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:40,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:31:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:40,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898541040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:40,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:40,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:31:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499244698] [2021-06-05 22:31:40,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:31:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:31:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:31:40,401 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) [2021-06-05 22:31:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:41,364 INFO L93 Difference]: Finished difference Result 3801 states and 15824 transitions. [2021-06-05 22:31:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:41,365 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 [2021-06-05 22:31:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:41,372 INFO L225 Difference]: With dead ends: 3801 [2021-06-05 22:31:41,372 INFO L226 Difference]: Without dead ends: 3782 [2021-06-05 22:31:41,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:31:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-06-05 22:31:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 2886. [2021-06-05 22:31:41,411 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) [2021-06-05 22:31:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 12415 transitions. [2021-06-05 22:31:41,417 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 12415 transitions. Word has length 29 [2021-06-05 22:31:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:41,417 INFO L482 AbstractCegarLoop]: Abstraction has 2886 states and 12415 transitions. [2021-06-05 22:31:41,417 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) [2021-06-05 22:31:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 12415 transitions. [2021-06-05 22:31:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:41,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:41,421 INFO L554 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] [2021-06-05 22:31:41,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:41,622 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:41,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:41,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-06-05 22:31:41,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:41,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509274252] [2021-06-05 22:31:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:41,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:41,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509274252] [2021-06-05 22:31:41,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509274252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:41,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457485417] [2021-06-05 22:31:41,772 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 [2021-06-05 22:31:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:41,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:41,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:41,843 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 [2021-06-05 22:31:41,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:41,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:41,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:41,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 22:31:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457485417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:41,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:41,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:31:41,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688630482] [2021-06-05 22:31:41,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:31:41,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:41,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:31:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:31:41,916 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) [2021-06-05 22:31:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:42,154 INFO L93 Difference]: Finished difference Result 3359 states and 14195 transitions. [2021-06-05 22:31:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:31:42,155 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 [2021-06-05 22:31:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:42,161 INFO L225 Difference]: With dead ends: 3359 [2021-06-05 22:31:42,161 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 22:31:42,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 233.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:31:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 22:31:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2794. [2021-06-05 22:31:42,195 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) [2021-06-05 22:31:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 12022 transitions. [2021-06-05 22:31:42,201 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 12022 transitions. Word has length 29 [2021-06-05 22:31:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:42,201 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 12022 transitions. [2021-06-05 22:31:42,201 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) [2021-06-05 22:31:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 12022 transitions. [2021-06-05 22:31:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:31:42,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:42,205 INFO L554 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] [2021-06-05 22:31:42,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 22:31:42,418 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash 310926972, now seen corresponding path program 20 times [2021-06-05 22:31:42,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:42,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321800409] [2021-06-05 22:31:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:42,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:42,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321800409] [2021-06-05 22:31:42,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321800409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:42,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443812549] [2021-06-05 22:31:42,556 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 [2021-06-05 22:31:42,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:42,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:42,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:42,616 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 [2021-06-05 22:31:42,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:42,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:42,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:42,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-05 22:31:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443812549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:42,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:42,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:31:42,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000652851] [2021-06-05 22:31:42,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:31:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:31:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:31:42,739 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) [2021-06-05 22:31:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:43,022 INFO L93 Difference]: Finished difference Result 2908 states and 12388 transitions. [2021-06-05 22:31:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:31:43,022 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 [2021-06-05 22:31:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:43,028 INFO L225 Difference]: With dead ends: 2908 [2021-06-05 22:31:43,028 INFO L226 Difference]: Without dead ends: 2889 [2021-06-05 22:31:43,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-06-05 22:31:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2770. [2021-06-05 22:31:43,083 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) [2021-06-05 22:31:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 11923 transitions. [2021-06-05 22:31:43,089 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 11923 transitions. Word has length 29 [2021-06-05 22:31:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:43,089 INFO L482 AbstractCegarLoop]: Abstraction has 2770 states and 11923 transitions. [2021-06-05 22:31:43,089 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) [2021-06-05 22:31:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 11923 transitions. [2021-06-05 22:31:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:31:43,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:43,093 INFO L554 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] [2021-06-05 22:31:43,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 22:31:43,309 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1155389859, now seen corresponding path program 31 times [2021-06-05 22:31:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:43,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511845242] [2021-06-05 22:31:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:43,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:43,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511845242] [2021-06-05 22:31:43,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511845242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:43,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355466523] [2021-06-05 22:31:43,327 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 [2021-06-05 22:31:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:43,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:31:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:43,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355466523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:43,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:43,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:31:43,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391892656] [2021-06-05 22:31:43,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:31:43,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:31:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:31:43,422 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) [2021-06-05 22:31:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:43,496 INFO L93 Difference]: Finished difference Result 4188 states and 17491 transitions. [2021-06-05 22:31:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:31:43,497 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 [2021-06-05 22:31:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:43,504 INFO L225 Difference]: With dead ends: 4188 [2021-06-05 22:31:43,505 INFO L226 Difference]: Without dead ends: 4109 [2021-06-05 22:31:43,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:31:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-05 22:31:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3709. [2021-06-05 22:31:43,551 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) [2021-06-05 22:31:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 16003 transitions. [2021-06-05 22:31:43,559 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 16003 transitions. Word has length 31 [2021-06-05 22:31:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:43,559 INFO L482 AbstractCegarLoop]: Abstraction has 3709 states and 16003 transitions. [2021-06-05 22:31:43,559 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) [2021-06-05 22:31:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 16003 transitions. [2021-06-05 22:31:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:31:43,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:43,565 INFO L554 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] [2021-06-05 22:31:43,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 22:31:43,765 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2104598493, now seen corresponding path program 32 times [2021-06-05 22:31:43,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:43,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881205188] [2021-06-05 22:31:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:43,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881205188] [2021-06-05 22:31:43,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881205188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943853606] [2021-06-05 22:31:43,785 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 [2021-06-05 22:31:43,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:31:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:43,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943853606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:43,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:43,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 22:31:43,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804132265] [2021-06-05 22:31:43,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:31:43,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:43,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:31:43,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:31:43,901 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) [2021-06-05 22:31:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:43,992 INFO L93 Difference]: Finished difference Result 5250 states and 21660 transitions. [2021-06-05 22:31:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:31:43,992 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 [2021-06-05 22:31:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:44,002 INFO L225 Difference]: With dead ends: 5250 [2021-06-05 22:31:44,002 INFO L226 Difference]: Without dead ends: 5094 [2021-06-05 22:31:44,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2021-06-05 22:31:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 3857. [2021-06-05 22:31:44,066 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) [2021-06-05 22:31:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 16513 transitions. [2021-06-05 22:31:44,075 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 16513 transitions. Word has length 31 [2021-06-05 22:31:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:44,075 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 16513 transitions. [2021-06-05 22:31:44,075 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) [2021-06-05 22:31:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 16513 transitions. [2021-06-05 22:31:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:31:44,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:44,081 INFO L554 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] [2021-06-05 22:31:44,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:44,281 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -663936225, now seen corresponding path program 33 times [2021-06-05 22:31:44,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:44,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95703062] [2021-06-05 22:31:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:44,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95703062] [2021-06-05 22:31:44,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95703062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788457534] [2021-06-05 22:31:44,303 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 [2021-06-05 22:31:44,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:44,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:31:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788457534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:44,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 22:31:44,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722543556] [2021-06-05 22:31:44,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:31:44,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:31:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:31:44,402 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) [2021-06-05 22:31:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:44,581 INFO L93 Difference]: Finished difference Result 5984 states and 24494 transitions. [2021-06-05 22:31:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:31:44,581 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 [2021-06-05 22:31:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:44,593 INFO L225 Difference]: With dead ends: 5984 [2021-06-05 22:31:44,593 INFO L226 Difference]: Without dead ends: 5677 [2021-06-05 22:31:44,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:31:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2021-06-05 22:31:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 4432. [2021-06-05 22:31:44,664 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) [2021-06-05 22:31:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 19050 transitions. [2021-06-05 22:31:44,674 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 19050 transitions. Word has length 31 [2021-06-05 22:31:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:44,674 INFO L482 AbstractCegarLoop]: Abstraction has 4432 states and 19050 transitions. [2021-06-05 22:31:44,674 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) [2021-06-05 22:31:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 19050 transitions. [2021-06-05 22:31:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:31:44,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:44,681 INFO L554 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] [2021-06-05 22:31:44,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:44,882 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:44,882 INFO L82 PathProgramCache]: Analyzing trace with hash -750260253, now seen corresponding path program 34 times [2021-06-05 22:31:44,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:44,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379984318] [2021-06-05 22:31:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379984318] [2021-06-05 22:31:44,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379984318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519400474] [2021-06-05 22:31:44,908 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 [2021-06-05 22:31:44,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:44,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:31:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:45,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519400474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:45,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:45,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 22:31:45,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795295735] [2021-06-05 22:31:45,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:31:45,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:31:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:31:45,006 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) [2021-06-05 22:31:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:45,086 INFO L93 Difference]: Finished difference Result 5271 states and 22063 transitions. [2021-06-05 22:31:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:31:45,086 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 [2021-06-05 22:31:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:45,096 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 22:31:45,096 INFO L226 Difference]: Without dead ends: 5199 [2021-06-05 22:31:45,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:31:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-06-05 22:31:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4424. [2021-06-05 22:31:45,157 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) [2021-06-05 22:31:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 18875 transitions. [2021-06-05 22:31:45,167 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 18875 transitions. Word has length 31 [2021-06-05 22:31:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:45,168 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 18875 transitions. [2021-06-05 22:31:45,168 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) [2021-06-05 22:31:45,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 18875 transitions. [2021-06-05 22:31:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:31:45,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:45,174 INFO L554 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] [2021-06-05 22:31:45,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:45,375 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:45,375 INFO L82 PathProgramCache]: Analyzing trace with hash 25855295, now seen corresponding path program 35 times [2021-06-05 22:31:45,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:45,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138195861] [2021-06-05 22:31:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:45,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:45,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138195861] [2021-06-05 22:31:45,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138195861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:45,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764135808] [2021-06-05 22:31:45,395 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 [2021-06-05 22:31:45,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:45,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:31:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:45,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764135808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:45,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:45,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 22:31:45,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252542263] [2021-06-05 22:31:45,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:31:45,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:31:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:31:45,486 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) [2021-06-05 22:31:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:45,567 INFO L93 Difference]: Finished difference Result 8018 states and 33019 transitions. [2021-06-05 22:31:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:31:45,567 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 [2021-06-05 22:31:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:45,583 INFO L225 Difference]: With dead ends: 8018 [2021-06-05 22:31:45,583 INFO L226 Difference]: Without dead ends: 7850 [2021-06-05 22:31:45,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:31:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7850 states. [2021-06-05 22:31:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7850 to 5708. [2021-06-05 22:31:45,711 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) [2021-06-05 22:31:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 24692 transitions. [2021-06-05 22:31:45,726 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 24692 transitions. Word has length 31 [2021-06-05 22:31:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:45,726 INFO L482 AbstractCegarLoop]: Abstraction has 5708 states and 24692 transitions. [2021-06-05 22:31:45,726 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) [2021-06-05 22:31:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 24692 transitions. [2021-06-05 22:31:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:31:45,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:45,735 INFO L554 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] [2021-06-05 22:31:45,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 22:31:45,936 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:45,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 36 times [2021-06-05 22:31:45,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:45,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154820817] [2021-06-05 22:31:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:45,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154820817] [2021-06-05 22:31:45,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154820817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124122760] [2021-06-05 22:31:45,955 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 [2021-06-05 22:31:45,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:31:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:46,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124122760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:46,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:31:46,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630258991] [2021-06-05 22:31:46,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:31:46,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:46,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:31:46,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:31:46,041 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) [2021-06-05 22:31:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:46,128 INFO L93 Difference]: Finished difference Result 7044 states and 29327 transitions. [2021-06-05 22:31:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:31:46,128 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 [2021-06-05 22:31:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:46,142 INFO L225 Difference]: With dead ends: 7044 [2021-06-05 22:31:46,142 INFO L226 Difference]: Without dead ends: 6900 [2021-06-05 22:31:46,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:31:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6900 states. [2021-06-05 22:31:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6900 to 5602. [2021-06-05 22:31:46,222 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) [2021-06-05 22:31:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 24167 transitions. [2021-06-05 22:31:46,237 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 24167 transitions. Word has length 31 [2021-06-05 22:31:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:46,237 INFO L482 AbstractCegarLoop]: Abstraction has 5602 states and 24167 transitions. [2021-06-05 22:31:46,237 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) [2021-06-05 22:31:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 24167 transitions. [2021-06-05 22:31:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:31:46,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:46,246 INFO L554 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] [2021-06-05 22:31:46,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 22:31:46,446 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash -823782915, now seen corresponding path program 37 times [2021-06-05 22:31:46,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:46,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233684915] [2021-06-05 22:31:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:46,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:46,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233684915] [2021-06-05 22:31:46,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233684915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010377770] [2021-06-05 22:31:46,467 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 [2021-06-05 22:31:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:31:46,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:46,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010377770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:46,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 22:31:46,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508228005] [2021-06-05 22:31:46,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:31:46,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:31:46,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:31:46,591 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) [2021-06-05 22:31:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:46,696 INFO L93 Difference]: Finished difference Result 8013 states and 33389 transitions. [2021-06-05 22:31:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:31:46,697 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 [2021-06-05 22:31:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:46,713 INFO L225 Difference]: With dead ends: 8013 [2021-06-05 22:31:46,713 INFO L226 Difference]: Without dead ends: 7878 [2021-06-05 22:31:46,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:31:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-05 22:31:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 5836. [2021-06-05 22:31:46,816 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) [2021-06-05 22:31:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 25149 transitions. [2021-06-05 22:31:46,831 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 25149 transitions. Word has length 31 [2021-06-05 22:31:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:46,831 INFO L482 AbstractCegarLoop]: Abstraction has 5836 states and 25149 transitions. [2021-06-05 22:31:46,831 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) [2021-06-05 22:31:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 25149 transitions. [2021-06-05 22:31:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:31:46,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:46,840 INFO L554 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] [2021-06-05 22:31:47,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 22:31:47,041 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1890243778, now seen corresponding path program 38 times [2021-06-05 22:31:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:47,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511451227] [2021-06-05 22:31:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511451227] [2021-06-05 22:31:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511451227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196467428] [2021-06-05 22:31:47,232 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 [2021-06-05 22:31:47,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:31:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:47,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:47,512 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 [2021-06-05 22:31:47,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:47,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:47,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:47,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:31:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196467428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:47,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:47,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:31:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677002674] [2021-06-05 22:31:47,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:31:47,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:31:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:31:47,693 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) [2021-06-05 22:31:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:48,840 INFO L93 Difference]: Finished difference Result 6478 states and 27684 transitions. [2021-06-05 22:31:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:48,841 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 [2021-06-05 22:31:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:48,855 INFO L225 Difference]: With dead ends: 6478 [2021-06-05 22:31:48,855 INFO L226 Difference]: Without dead ends: 6459 [2021-06-05 22:31:48,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1078.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:31:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-06-05 22:31:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5939. [2021-06-05 22:31:48,939 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) [2021-06-05 22:31:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 25557 transitions. [2021-06-05 22:31:48,954 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 25557 transitions. Word has length 33 [2021-06-05 22:31:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:48,955 INFO L482 AbstractCegarLoop]: Abstraction has 5939 states and 25557 transitions. [2021-06-05 22:31:48,955 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) [2021-06-05 22:31:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 25557 transitions. [2021-06-05 22:31:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:31:48,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:48,964 INFO L554 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] [2021-06-05 22:31:49,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 22:31:49,164 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash 185907592, now seen corresponding path program 39 times [2021-06-05 22:31:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:49,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656481439] [2021-06-05 22:31:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:49,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:49,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656481439] [2021-06-05 22:31:49,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656481439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:49,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760969174] [2021-06-05 22:31:49,361 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 [2021-06-05 22:31:49,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:31:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:49,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:49,687 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 [2021-06-05 22:31:49,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:49,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:49,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:49,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:31:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:49,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760969174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:49,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:49,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:31:49,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941611998] [2021-06-05 22:31:49,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:31:49,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:49,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:31:49,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:31:49,874 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) [2021-06-05 22:31:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:51,317 INFO L93 Difference]: Finished difference Result 6497 states and 27746 transitions. [2021-06-05 22:31:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:51,317 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 [2021-06-05 22:31:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:51,332 INFO L225 Difference]: With dead ends: 6497 [2021-06-05 22:31:51,332 INFO L226 Difference]: Without dead ends: 6478 [2021-06-05 22:31:51,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1222.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-06-05 22:31:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5942. [2021-06-05 22:31:51,408 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) [2021-06-05 22:31:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 25567 transitions. [2021-06-05 22:31:51,423 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 25567 transitions. Word has length 33 [2021-06-05 22:31:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:51,423 INFO L482 AbstractCegarLoop]: Abstraction has 5942 states and 25567 transitions. [2021-06-05 22:31:51,423 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) [2021-06-05 22:31:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 25567 transitions. [2021-06-05 22:31:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:31:51,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:51,432 INFO L554 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] [2021-06-05 22:31:51,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 22:31:51,632 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -265337576, now seen corresponding path program 40 times [2021-06-05 22:31:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:51,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248444385] [2021-06-05 22:31:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:51,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:51,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248444385] [2021-06-05 22:31:51,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248444385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:51,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641029597] [2021-06-05 22:31:51,823 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 [2021-06-05 22:31:51,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:51,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:51,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:31:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:52,130 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 [2021-06-05 22:31:52,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:52,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:52,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:52,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:31:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:52,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641029597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:52,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:52,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:31:52,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685588] [2021-06-05 22:31:52,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:52,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:52,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:52,196 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) [2021-06-05 22:31:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:53,563 INFO L93 Difference]: Finished difference Result 6457 states and 27475 transitions. [2021-06-05 22:31:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:53,563 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 [2021-06-05 22:31:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:53,577 INFO L225 Difference]: With dead ends: 6457 [2021-06-05 22:31:53,577 INFO L226 Difference]: Without dead ends: 6438 [2021-06-05 22:31:53,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1056.6ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-06-05 22:31:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5990. [2021-06-05 22:31:53,660 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) [2021-06-05 22:31:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 25795 transitions. [2021-06-05 22:31:53,676 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 25795 transitions. Word has length 33 [2021-06-05 22:31:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:53,676 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 25795 transitions. [2021-06-05 22:31:53,676 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) [2021-06-05 22:31:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 25795 transitions. [2021-06-05 22:31:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:31:53,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:53,685 INFO L554 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] [2021-06-05 22:31:53,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:53,886 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1848381270, now seen corresponding path program 41 times [2021-06-05 22:31:53,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:53,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259575100] [2021-06-05 22:31:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:54,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259575100] [2021-06-05 22:31:54,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259575100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:54,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886657005] [2021-06-05 22:31:54,137 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 [2021-06-05 22:31:54,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:31:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:31:54,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:54,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:54,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:54,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:31:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:54,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886657005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:54,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:54,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:31:54,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126521322] [2021-06-05 22:31:54,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:54,493 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) [2021-06-05 22:31:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:56,065 INFO L93 Difference]: Finished difference Result 6603 states and 28103 transitions. [2021-06-05 22:31:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:56,065 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 [2021-06-05 22:31:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:56,080 INFO L225 Difference]: With dead ends: 6603 [2021-06-05 22:31:56,080 INFO L226 Difference]: Without dead ends: 6584 [2021-06-05 22:31:56,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1243.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-06-05 22:31:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6014. [2021-06-05 22:31:56,164 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) [2021-06-05 22:31:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 25905 transitions. [2021-06-05 22:31:56,181 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 25905 transitions. Word has length 33 [2021-06-05 22:31:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:56,181 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 25905 transitions. [2021-06-05 22:31:56,181 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) [2021-06-05 22:31:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 25905 transitions. [2021-06-05 22:31:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:31:56,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:56,190 INFO L554 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] [2021-06-05 22:31:56,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:56,391 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1882988602, now seen corresponding path program 42 times [2021-06-05 22:31:56,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:56,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398134436] [2021-06-05 22:31:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:56,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:56,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398134436] [2021-06-05 22:31:56,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398134436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:56,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895767670] [2021-06-05 22:31:56,597 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 [2021-06-05 22:31:56,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:56,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:56,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:31:56,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:56,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:57,004 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:31:57,004 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 [2021-06-05 22:31:57,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:57,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:57,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:57,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:31:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:57,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895767670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:57,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:57,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:31:57,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490697318] [2021-06-05 22:31:57,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:31:57,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:57,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:31:57,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:31:57,170 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) [2021-06-05 22:31:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:58,768 INFO L93 Difference]: Finished difference Result 6445 states and 27477 transitions. [2021-06-05 22:31:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:58,768 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 [2021-06-05 22:31:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:58,783 INFO L225 Difference]: With dead ends: 6445 [2021-06-05 22:31:58,783 INFO L226 Difference]: Without dead ends: 6426 [2021-06-05 22:31:58,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1454.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:31:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-06-05 22:31:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6027. [2021-06-05 22:31:58,864 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) [2021-06-05 22:31:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 25947 transitions. [2021-06-05 22:31:58,879 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 25947 transitions. Word has length 33 [2021-06-05 22:31:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:58,879 INFO L482 AbstractCegarLoop]: Abstraction has 6027 states and 25947 transitions. [2021-06-05 22:31:58,879 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) [2021-06-05 22:31:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 25947 transitions. [2021-06-05 22:31:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:31:58,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:58,888 INFO L554 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] [2021-06-05 22:31:59,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:59,088 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1511763596, now seen corresponding path program 43 times [2021-06-05 22:31:59,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:59,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440007908] [2021-06-05 22:31:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:59,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:59,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440007908] [2021-06-05 22:31:59,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440007908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:59,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077113114] [2021-06-05 22:31:59,269 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 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 [2021-06-05 22:31:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:31:59,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:59,472 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 20 treesize of output 12 [2021-06-05 22:31:59,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:59,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:59,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:59,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:31:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077113114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:59,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:59,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:31:59,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348151697] [2021-06-05 22:31:59,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:31:59,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:31:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:31:59,604 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) [2021-06-05 22:32:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:00,924 INFO L93 Difference]: Finished difference Result 6944 states and 29518 transitions. [2021-06-05 22:32:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:32:00,924 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 [2021-06-05 22:32:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:00,941 INFO L225 Difference]: With dead ends: 6944 [2021-06-05 22:32:00,941 INFO L226 Difference]: Without dead ends: 6929 [2021-06-05 22:32:00,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 902.8ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:32:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6929 states. [2021-06-05 22:32:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6929 to 6091. [2021-06-05 22:32:01,047 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) [2021-06-05 22:32:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6091 states to 6091 states and 26216 transitions. [2021-06-05 22:32:01,062 INFO L78 Accepts]: Start accepts. Automaton has 6091 states and 26216 transitions. Word has length 33 [2021-06-05 22:32:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:01,062 INFO L482 AbstractCegarLoop]: Abstraction has 6091 states and 26216 transitions. [2021-06-05 22:32:01,063 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) [2021-06-05 22:32:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6091 states and 26216 transitions. [2021-06-05 22:32:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:01,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:01,072 INFO L554 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] [2021-06-05 22:32:01,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 22:32:01,272 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -156629846, now seen corresponding path program 44 times [2021-06-05 22:32:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:01,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614357677] [2021-06-05 22:32:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:01,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:01,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614357677] [2021-06-05 22:32:01,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614357677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:01,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268739991] [2021-06-05 22:32:01,477 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 [2021-06-05 22:32:01,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:01,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:01,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:01,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:01,714 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 [2021-06-05 22:32:01,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:01,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:01,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:01,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 22:32:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:01,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268739991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:01,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:01,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:32:01,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178300039] [2021-06-05 22:32:01,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:01,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:01,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:01,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:01,888 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) [2021-06-05 22:32:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:02,883 INFO L93 Difference]: Finished difference Result 6487 states and 27705 transitions. [2021-06-05 22:32:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:32:02,883 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 [2021-06-05 22:32:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:02,898 INFO L225 Difference]: With dead ends: 6487 [2021-06-05 22:32:02,899 INFO L226 Difference]: Without dead ends: 6473 [2021-06-05 22:32:02,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 965.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:32:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-06-05 22:32:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 6077. [2021-06-05 22:32:02,981 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) [2021-06-05 22:32:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 26173 transitions. [2021-06-05 22:32:02,998 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 26173 transitions. Word has length 33 [2021-06-05 22:32:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:02,998 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 26173 transitions. [2021-06-05 22:32:02,998 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) [2021-06-05 22:32:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 26173 transitions. [2021-06-05 22:32:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:03,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:03,008 INFO L554 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] [2021-06-05 22:32:03,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 22:32:03,209 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1226663166, now seen corresponding path program 45 times [2021-06-05 22:32:03,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:03,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66842716] [2021-06-05 22:32:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:03,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66842716] [2021-06-05 22:32:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66842716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225369001] [2021-06-05 22:32:03,397 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 [2021-06-05 22:32:03,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:03,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:03,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:03,730 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 [2021-06-05 22:32:03,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:03,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:03,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:03,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:32:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:03,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225369001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:03,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:03,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:32:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935074295] [2021-06-05 22:32:03,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:03,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:03,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:03,868 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) [2021-06-05 22:32:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:05,117 INFO L93 Difference]: Finished difference Result 6650 states and 28426 transitions. [2021-06-05 22:32:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:05,117 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 [2021-06-05 22:32:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:05,133 INFO L225 Difference]: With dead ends: 6650 [2021-06-05 22:32:05,133 INFO L226 Difference]: Without dead ends: 6631 [2021-06-05 22:32:05,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1154.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6631 states. [2021-06-05 22:32:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6631 to 6077. [2021-06-05 22:32:05,222 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) [2021-06-05 22:32:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 26173 transitions. [2021-06-05 22:32:05,237 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 26173 transitions. Word has length 33 [2021-06-05 22:32:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:05,237 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 26173 transitions. [2021-06-05 22:32:05,237 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) [2021-06-05 22:32:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 26173 transitions. [2021-06-05 22:32:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:05,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:05,247 INFO L554 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] [2021-06-05 22:32:05,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:05,447 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1371223120, now seen corresponding path program 46 times [2021-06-05 22:32:05,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:05,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181656915] [2021-06-05 22:32:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:05,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:05,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181656915] [2021-06-05 22:32:05,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181656915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:05,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222866334] [2021-06-05 22:32:05,654 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 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 [2021-06-05 22:32:05,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:05,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:05,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:05,887 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 [2021-06-05 22:32:05,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:05,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:05,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:05,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:32:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:05,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222866334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:05,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:05,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:32:05,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341755128] [2021-06-05 22:32:05,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:05,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:05,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:05,989 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) [2021-06-05 22:32:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:07,322 INFO L93 Difference]: Finished difference Result 7061 states and 30025 transitions. [2021-06-05 22:32:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:32:07,323 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 [2021-06-05 22:32:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:07,339 INFO L225 Difference]: With dead ends: 7061 [2021-06-05 22:32:07,339 INFO L226 Difference]: Without dead ends: 7026 [2021-06-05 22:32:07,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1014.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-05 22:32:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 6011. [2021-06-05 22:32:07,431 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) [2021-06-05 22:32:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 25921 transitions. [2021-06-05 22:32:07,446 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 25921 transitions. Word has length 33 [2021-06-05 22:32:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:07,446 INFO L482 AbstractCegarLoop]: Abstraction has 6011 states and 25921 transitions. [2021-06-05 22:32:07,446 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) [2021-06-05 22:32:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 25921 transitions. [2021-06-05 22:32:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:07,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:07,456 INFO L554 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] [2021-06-05 22:32:07,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:07,661 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash 142194076, now seen corresponding path program 47 times [2021-06-05 22:32:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:07,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181419855] [2021-06-05 22:32:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:07,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:07,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181419855] [2021-06-05 22:32:07,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181419855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:07,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305234038] [2021-06-05 22:32:07,883 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 [2021-06-05 22:32:07,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:32:07,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:08,086 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 [2021-06-05 22:32:08,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:08,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:08,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:08,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:32:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:08,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305234038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:08,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:08,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:32:08,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120639288] [2021-06-05 22:32:08,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:32:08,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:08,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:32:08,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:08,204 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) [2021-06-05 22:32:08,669 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:32:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:10,224 INFO L93 Difference]: Finished difference Result 7106 states and 29893 transitions. [2021-06-05 22:32:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:32:10,224 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 [2021-06-05 22:32:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:10,239 INFO L225 Difference]: With dead ends: 7106 [2021-06-05 22:32:10,239 INFO L226 Difference]: Without dead ends: 7091 [2021-06-05 22:32:10,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1621.1ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:32:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7091 states. [2021-06-05 22:32:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7091 to 6062. [2021-06-05 22:32:10,379 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) [2021-06-05 22:32:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 26157 transitions. [2021-06-05 22:32:10,393 INFO L78 Accepts]: Start accepts. Automaton has 6062 states and 26157 transitions. Word has length 33 [2021-06-05 22:32:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:10,393 INFO L482 AbstractCegarLoop]: Abstraction has 6062 states and 26157 transitions. [2021-06-05 22:32:10,394 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) [2021-06-05 22:32:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6062 states and 26157 transitions. [2021-06-05 22:32:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:10,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:10,403 INFO L554 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] [2021-06-05 22:32:10,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:10,603 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash -210945414, now seen corresponding path program 48 times [2021-06-05 22:32:10,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:10,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215036252] [2021-06-05 22:32:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:10,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:10,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215036252] [2021-06-05 22:32:10,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215036252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:10,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434822060] [2021-06-05 22:32:10,821 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 [2021-06-05 22:32:10,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:32:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:32:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:11,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:11,024 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 [2021-06-05 22:32:11,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:11,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:11,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:11,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:48 [2021-06-05 22:32:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:11,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434822060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:11,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:11,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:32:11,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999504525] [2021-06-05 22:32:11,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:32:11,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:11,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:32:11,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:32:11,366 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) [2021-06-05 22:32:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:14,424 INFO L93 Difference]: Finished difference Result 7070 states and 30030 transitions. [2021-06-05 22:32:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:32:14,424 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 [2021-06-05 22:32:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:14,439 INFO L225 Difference]: With dead ends: 7070 [2021-06-05 22:32:14,439 INFO L226 Difference]: Without dead ends: 7047 [2021-06-05 22:32:14,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2387.2ms TimeCoverageRelationStatistics Valid=334, Invalid=3088, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:32:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2021-06-05 22:32:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 6114. [2021-06-05 22:32:14,518 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) [2021-06-05 22:32:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 26399 transitions. [2021-06-05 22:32:14,534 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 26399 transitions. Word has length 33 [2021-06-05 22:32:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:14,534 INFO L482 AbstractCegarLoop]: Abstraction has 6114 states and 26399 transitions. [2021-06-05 22:32:14,534 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) [2021-06-05 22:32:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 26399 transitions. [2021-06-05 22:32:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:14,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:14,544 INFO L554 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] [2021-06-05 22:32:14,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:14,749 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:14,749 INFO L82 PathProgramCache]: Analyzing trace with hash -399786980, now seen corresponding path program 49 times [2021-06-05 22:32:14,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:14,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162017063] [2021-06-05 22:32:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:15,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:15,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162017063] [2021-06-05 22:32:15,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162017063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:15,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448046857] [2021-06-05 22:32:15,002 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 [2021-06-05 22:32:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:15,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:15,197 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 [2021-06-05 22:32:15,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:15,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:15,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:15,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:32:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:15,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448046857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:15,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:15,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:32:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593274298] [2021-06-05 22:32:15,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:32:15,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:15,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:32:15,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:15,310 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) [2021-06-05 22:32:15,747 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 22:32:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:17,320 INFO L93 Difference]: Finished difference Result 7388 states and 31262 transitions. [2021-06-05 22:32:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:32:17,321 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 [2021-06-05 22:32:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:17,337 INFO L225 Difference]: With dead ends: 7388 [2021-06-05 22:32:17,337 INFO L226 Difference]: Without dead ends: 7364 [2021-06-05 22:32:17,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1594.2ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:32:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7364 states. [2021-06-05 22:32:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7364 to 6230. [2021-06-05 22:32:17,479 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) [2021-06-05 22:32:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 26886 transitions. [2021-06-05 22:32:17,494 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 26886 transitions. Word has length 33 [2021-06-05 22:32:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:17,495 INFO L482 AbstractCegarLoop]: Abstraction has 6230 states and 26886 transitions. [2021-06-05 22:32:17,495 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) [2021-06-05 22:32:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 26886 transitions. [2021-06-05 22:32:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:17,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:17,504 INFO L554 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] [2021-06-05 22:32:17,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 22:32:17,705 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:17,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2068180422, now seen corresponding path program 50 times [2021-06-05 22:32:17,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:17,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439462460] [2021-06-05 22:32:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:17,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439462460] [2021-06-05 22:32:17,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439462460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989309023] [2021-06-05 22:32:17,916 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 [2021-06-05 22:32:17,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:17,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:32:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:18,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:18,094 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 [2021-06-05 22:32:18,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:18,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:18,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:18,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 22:32:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:18,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989309023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:18,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:18,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:32:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580081871] [2021-06-05 22:32:18,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:18,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:18,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:18,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:18,310 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) [2021-06-05 22:32:19,589 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 22:32:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:20,151 INFO L93 Difference]: Finished difference Result 7081 states and 29790 transitions. [2021-06-05 22:32:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:32:20,151 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 [2021-06-05 22:32:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:20,172 INFO L225 Difference]: With dead ends: 7081 [2021-06-05 22:32:20,172 INFO L226 Difference]: Without dead ends: 7067 [2021-06-05 22:32:20,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1597.2ms TimeCoverageRelationStatistics Valid=310, Invalid=2042, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:32:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7067 states. [2021-06-05 22:32:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7067 to 6227. [2021-06-05 22:32:20,281 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) [2021-06-05 22:32:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6227 states to 6227 states and 26876 transitions. [2021-06-05 22:32:20,297 INFO L78 Accepts]: Start accepts. Automaton has 6227 states and 26876 transitions. Word has length 33 [2021-06-05 22:32:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:20,297 INFO L482 AbstractCegarLoop]: Abstraction has 6227 states and 26876 transitions. [2021-06-05 22:32:20,297 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) [2021-06-05 22:32:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6227 states and 26876 transitions. [2021-06-05 22:32:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:20,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:20,308 INFO L554 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] [2021-06-05 22:32:20,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:20,510 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:20,510 INFO L82 PathProgramCache]: Analyzing trace with hash 44248208, now seen corresponding path program 51 times [2021-06-05 22:32:20,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:20,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094744871] [2021-06-05 22:32:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:20,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:20,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094744871] [2021-06-05 22:32:20,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094744871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:20,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733906176] [2021-06-05 22:32:20,757 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 [2021-06-05 22:32:20,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:32:20,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:20,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:32:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:21,020 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:32:21,021 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 [2021-06-05 22:32:21,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:21,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:21,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:21,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:32:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:21,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733906176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:21,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:21,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:32:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731945513] [2021-06-05 22:32:21,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:32:21,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:32:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:32:21,213 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) [2021-06-05 22:32:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:23,482 INFO L93 Difference]: Finished difference Result 7505 states and 31385 transitions. [2021-06-05 22:32:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:32:23,483 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 [2021-06-05 22:32:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:23,500 INFO L225 Difference]: With dead ends: 7505 [2021-06-05 22:32:23,500 INFO L226 Difference]: Without dead ends: 7481 [2021-06-05 22:32:23,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1866.7ms TimeCoverageRelationStatistics Valid=400, Invalid=2792, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:32:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2021-06-05 22:32:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 6267. [2021-06-05 22:32:23,595 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) [2021-06-05 22:32:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6267 states to 6267 states and 27066 transitions. [2021-06-05 22:32:23,611 INFO L78 Accepts]: Start accepts. Automaton has 6267 states and 27066 transitions. Word has length 33 [2021-06-05 22:32:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:23,612 INFO L482 AbstractCegarLoop]: Abstraction has 6267 states and 27066 transitions. [2021-06-05 22:32:23,612 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) [2021-06-05 22:32:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6267 states and 27066 transitions. [2021-06-05 22:32:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:23,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:23,622 INFO L554 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] [2021-06-05 22:32:23,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 22:32:23,825 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1213926998, now seen corresponding path program 52 times [2021-06-05 22:32:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:23,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947513647] [2021-06-05 22:32:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:24,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:24,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947513647] [2021-06-05 22:32:24,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947513647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:24,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211212374] [2021-06-05 22:32:24,021 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 [2021-06-05 22:32:24,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:24,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:24,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:24,195 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 [2021-06-05 22:32:24,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:24,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:24,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:24,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:32:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:24,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211212374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:24,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:24,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:32:24,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248354897] [2021-06-05 22:32:24,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:24,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:24,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:24,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:24,309 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) [2021-06-05 22:32:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:25,498 INFO L93 Difference]: Finished difference Result 7474 states and 31665 transitions. [2021-06-05 22:32:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:32:25,498 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 [2021-06-05 22:32:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:25,516 INFO L225 Difference]: With dead ends: 7474 [2021-06-05 22:32:25,516 INFO L226 Difference]: Without dead ends: 7432 [2021-06-05 22:32:25,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 895.4ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-06-05 22:32:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 6273. [2021-06-05 22:32:25,628 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) [2021-06-05 22:32:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 27106 transitions. [2021-06-05 22:32:25,644 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 27106 transitions. Word has length 33 [2021-06-05 22:32:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:25,644 INFO L482 AbstractCegarLoop]: Abstraction has 6273 states and 27106 transitions. [2021-06-05 22:32:25,644 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) [2021-06-05 22:32:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 27106 transitions. [2021-06-05 22:32:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:25,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:25,655 INFO L554 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] [2021-06-05 22:32:25,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:25,855 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1424413324, now seen corresponding path program 53 times [2021-06-05 22:32:25,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:25,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976202657] [2021-06-05 22:32:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:26,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:26,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976202657] [2021-06-05 22:32:26,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976202657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559601816] [2021-06-05 22:32:26,084 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 [2021-06-05 22:32:26,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:32:26,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:32:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:26,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:26,272 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 [2021-06-05 22:32:26,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:26,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:26,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:26,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:32:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:26,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559601816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:26,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:32:26,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613711661] [2021-06-05 22:32:26,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:26,456 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) [2021-06-05 22:32:28,349 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 22:32:28,815 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 22:32:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:29,483 INFO L93 Difference]: Finished difference Result 7444 states and 31744 transitions. [2021-06-05 22:32:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:32:29,483 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 [2021-06-05 22:32:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:29,500 INFO L225 Difference]: With dead ends: 7444 [2021-06-05 22:32:29,500 INFO L226 Difference]: Without dead ends: 7420 [2021-06-05 22:32:29,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2591.2ms TimeCoverageRelationStatistics Valid=612, Invalid=4080, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:32:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7420 states. [2021-06-05 22:32:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7420 to 6357. [2021-06-05 22:32:29,596 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) [2021-06-05 22:32:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6357 states to 6357 states and 27479 transitions. [2021-06-05 22:32:29,612 INFO L78 Accepts]: Start accepts. Automaton has 6357 states and 27479 transitions. Word has length 33 [2021-06-05 22:32:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:29,612 INFO L482 AbstractCegarLoop]: Abstraction has 6357 states and 27479 transitions. [2021-06-05 22:32:29,612 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) [2021-06-05 22:32:29,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6357 states and 27479 transitions. [2021-06-05 22:32:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:29,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:29,623 INFO L554 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] [2021-06-05 22:32:29,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:29,823 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1013318964, now seen corresponding path program 54 times [2021-06-05 22:32:29,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:29,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5160824] [2021-06-05 22:32:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:30,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:30,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5160824] [2021-06-05 22:32:30,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5160824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:30,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261649962] [2021-06-05 22:32:30,082 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 [2021-06-05 22:32:30,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:32:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:32:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:30,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:30,261 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 [2021-06-05 22:32:30,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:30,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:30,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:30,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:32:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:30,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261649962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:30,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:30,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:32:30,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579108092] [2021-06-05 22:32:30,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:30,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:30,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:30,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:30,491 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) [2021-06-05 22:32:31,037 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 22:32:31,892 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 22:32:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:33,027 INFO L93 Difference]: Finished difference Result 7846 states and 32751 transitions. [2021-06-05 22:32:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:32:33,028 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 [2021-06-05 22:32:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:33,045 INFO L225 Difference]: With dead ends: 7846 [2021-06-05 22:32:33,045 INFO L226 Difference]: Without dead ends: 7822 [2021-06-05 22:32:33,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2396.9ms TimeCoverageRelationStatistics Valid=527, Invalid=3255, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:32:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2021-06-05 22:32:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 6441. [2021-06-05 22:32:33,178 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) [2021-06-05 22:32:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 27870 transitions. [2021-06-05 22:32:33,194 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 27870 transitions. Word has length 33 [2021-06-05 22:32:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:33,194 INFO L482 AbstractCegarLoop]: Abstraction has 6441 states and 27870 transitions. [2021-06-05 22:32:33,194 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) [2021-06-05 22:32:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 27870 transitions. [2021-06-05 22:32:33,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:33,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:33,204 INFO L554 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] [2021-06-05 22:32:33,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 22:32:33,405 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash -244856242, now seen corresponding path program 55 times [2021-06-05 22:32:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:33,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755680125] [2021-06-05 22:32:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:33,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:33,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755680125] [2021-06-05 22:32:33,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755680125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:33,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146434735] [2021-06-05 22:32:33,585 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 [2021-06-05 22:32:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:33,753 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 [2021-06-05 22:32:33,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:33,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:33,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:33,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:32:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:33,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146434735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:33,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:33,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:32:33,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082993801] [2021-06-05 22:32:33,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:33,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:33,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:33,868 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) [2021-06-05 22:32:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:34,894 INFO L93 Difference]: Finished difference Result 7756 states and 32734 transitions. [2021-06-05 22:32:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:32:34,894 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 [2021-06-05 22:32:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:34,911 INFO L225 Difference]: With dead ends: 7756 [2021-06-05 22:32:34,911 INFO L226 Difference]: Without dead ends: 7714 [2021-06-05 22:32:34,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-06-05 22:32:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 6366. [2021-06-05 22:32:35,025 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) [2021-06-05 22:32:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 27560 transitions. [2021-06-05 22:32:35,041 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 27560 transitions. Word has length 33 [2021-06-05 22:32:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:35,041 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 27560 transitions. [2021-06-05 22:32:35,041 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) [2021-06-05 22:32:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 27560 transitions. [2021-06-05 22:32:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:35,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:35,055 INFO L554 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] [2021-06-05 22:32:35,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:32:35,277 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash 171020724, now seen corresponding path program 56 times [2021-06-05 22:32:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:35,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728925198] [2021-06-05 22:32:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:35,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:35,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728925198] [2021-06-05 22:32:35,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728925198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:35,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350121155] [2021-06-05 22:32:35,457 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 [2021-06-05 22:32:35,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:32:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:35,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:35,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:35,640 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 [2021-06-05 22:32:35,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:35,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:35,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:35,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 22:32:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:35,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350121155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:35,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:35,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:32:35,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405100313] [2021-06-05 22:32:35,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:35,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:35,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:35,838 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) [2021-06-05 22:32:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:37,804 INFO L93 Difference]: Finished difference Result 6927 states and 29768 transitions. [2021-06-05 22:32:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:32:37,804 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 [2021-06-05 22:32:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:37,820 INFO L225 Difference]: With dead ends: 6927 [2021-06-05 22:32:37,820 INFO L226 Difference]: Without dead ends: 6887 [2021-06-05 22:32:37,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1516.2ms TimeCoverageRelationStatistics Valid=277, Invalid=2075, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:32:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-06-05 22:32:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6354. [2021-06-05 22:32:37,912 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) [2021-06-05 22:32:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 27507 transitions. [2021-06-05 22:32:37,929 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 27507 transitions. Word has length 33 [2021-06-05 22:32:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:37,929 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 27507 transitions. [2021-06-05 22:32:37,930 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) [2021-06-05 22:32:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 27507 transitions. [2021-06-05 22:32:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:37,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:37,940 INFO L554 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] [2021-06-05 22:32:38,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:38,141 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1030111212, now seen corresponding path program 57 times [2021-06-05 22:32:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:38,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113251908] [2021-06-05 22:32:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:38,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113251908] [2021-06-05 22:32:38,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113251908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975443463] [2021-06-05 22:32:38,373 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 [2021-06-05 22:32:38,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:38,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:32:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:38,616 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:32:38,616 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 [2021-06-05 22:32:38,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:38,647 INFO L628 ElimStorePlain]: treesize reduction 67, result has 24.7 percent of original size [2021-06-05 22:32:38,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:38,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:32:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:38,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975443463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:38,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:38,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:32:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709228458] [2021-06-05 22:32:38,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:32:38,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:32:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:38,794 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) [2021-06-05 22:32:39,629 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 22:32:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:42,264 INFO L93 Difference]: Finished difference Result 7896 states and 33401 transitions. [2021-06-05 22:32:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:32:42,265 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 [2021-06-05 22:32:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:42,281 INFO L225 Difference]: With dead ends: 7896 [2021-06-05 22:32:42,281 INFO L226 Difference]: Without dead ends: 7866 [2021-06-05 22:32:42,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 2629.4ms TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:32:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7866 states. [2021-06-05 22:32:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7866 to 6485. [2021-06-05 22:32:42,378 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) [2021-06-05 22:32:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 28163 transitions. [2021-06-05 22:32:42,395 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 28163 transitions. Word has length 33 [2021-06-05 22:32:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:42,395 INFO L482 AbstractCegarLoop]: Abstraction has 6485 states and 28163 transitions. [2021-06-05 22:32:42,395 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) [2021-06-05 22:32:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 28163 transitions. [2021-06-05 22:32:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:42,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:42,406 INFO L554 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] [2021-06-05 22:32:42,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 22:32:42,606 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1218952778, now seen corresponding path program 58 times [2021-06-05 22:32:42,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:42,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451312506] [2021-06-05 22:32:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:42,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:42,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451312506] [2021-06-05 22:32:42,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451312506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:42,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229797128] [2021-06-05 22:32:42,826 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 [2021-06-05 22:32:42,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:42,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:42,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:32:43,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:43,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:43,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:43,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:32:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:43,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229797128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:43,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:43,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:32:43,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880573956] [2021-06-05 22:32:43,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:32:43,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:32:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:43,102 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) [2021-06-05 22:32:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:45,098 INFO L93 Difference]: Finished difference Result 8537 states and 35873 transitions. [2021-06-05 22:32:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:32:45,099 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 [2021-06-05 22:32:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:45,117 INFO L225 Difference]: With dead ends: 8537 [2021-06-05 22:32:45,118 INFO L226 Difference]: Without dead ends: 8510 [2021-06-05 22:32:45,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1463.8ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:32:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8510 states. [2021-06-05 22:32:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8510 to 6636. [2021-06-05 22:32:45,234 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) [2021-06-05 22:32:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 28789 transitions. [2021-06-05 22:32:45,319 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 28789 transitions. Word has length 33 [2021-06-05 22:32:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:45,319 INFO L482 AbstractCegarLoop]: Abstraction has 6636 states and 28789 transitions. [2021-06-05 22:32:45,319 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) [2021-06-05 22:32:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 28789 transitions. [2021-06-05 22:32:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:45,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:45,331 INFO L554 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] [2021-06-05 22:32:45,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 22:32:45,531 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1407621076, now seen corresponding path program 59 times [2021-06-05 22:32:45,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:45,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013869513] [2021-06-05 22:32:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:45,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:45,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013869513] [2021-06-05 22:32:45,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013869513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:45,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410091154] [2021-06-05 22:32:45,773 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 [2021-06-05 22:32:45,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:45,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:46,011 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 [2021-06-05 22:32:46,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:46,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:46,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:46,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:32:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:46,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410091154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:46,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:46,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:32:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217240819] [2021-06-05 22:32:46,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:46,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:46,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:46,119 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) [2021-06-05 22:32:46,714 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 22:32:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:48,811 INFO L93 Difference]: Finished difference Result 9219 states and 37824 transitions. [2021-06-05 22:32:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:32:48,811 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 [2021-06-05 22:32:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:48,831 INFO L225 Difference]: With dead ends: 9219 [2021-06-05 22:32:48,831 INFO L226 Difference]: Without dead ends: 9147 [2021-06-05 22:32:48,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2119.6ms TimeCoverageRelationStatistics Valid=436, Invalid=2986, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:32:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-06-05 22:32:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 6588. [2021-06-05 22:32:48,945 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) [2021-06-05 22:32:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 28590 transitions. [2021-06-05 22:32:48,962 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 28590 transitions. Word has length 33 [2021-06-05 22:32:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:48,962 INFO L482 AbstractCegarLoop]: Abstraction has 6588 states and 28590 transitions. [2021-06-05 22:32:48,962 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) [2021-06-05 22:32:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 28590 transitions. [2021-06-05 22:32:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:48,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:48,973 INFO L554 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] [2021-06-05 22:32:49,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:49,174 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:49,174 INFO L82 PathProgramCache]: Analyzing trace with hash 565322836, now seen corresponding path program 60 times [2021-06-05 22:32:49,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:49,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387988286] [2021-06-05 22:32:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:49,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387988286] [2021-06-05 22:32:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387988286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729920171] [2021-06-05 22:32:49,390 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 [2021-06-05 22:32:49,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:49,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:32:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:49,763 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 22:32:49,764 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 [2021-06-05 22:32:49,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:50,001 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-05 22:32:50,002 INFO L628 ElimStorePlain]: treesize reduction 73, result has 53.8 percent of original size [2021-06-05 22:32:50,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:50,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:284 [2021-06-05 22:32:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:50,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729920171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:50,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:50,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:32:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062453794] [2021-06-05 22:32:50,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:32:50,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:50,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:32:50,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:50,283 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) [2021-06-05 22:32:51,122 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 22:32:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:52,884 INFO L93 Difference]: Finished difference Result 7677 states and 32864 transitions. [2021-06-05 22:32:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:32:52,884 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 [2021-06-05 22:32:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:52,901 INFO L225 Difference]: With dead ends: 7677 [2021-06-05 22:32:52,901 INFO L226 Difference]: Without dead ends: 7637 [2021-06-05 22:32:52,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2223.5ms TimeCoverageRelationStatistics Valid=398, Invalid=2908, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:32:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7637 states. [2021-06-05 22:32:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7637 to 6618. [2021-06-05 22:32:53,002 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) [2021-06-05 22:32:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6618 states to 6618 states and 28745 transitions. [2021-06-05 22:32:53,019 INFO L78 Accepts]: Start accepts. Automaton has 6618 states and 28745 transitions. Word has length 33 [2021-06-05 22:32:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:53,019 INFO L482 AbstractCegarLoop]: Abstraction has 6618 states and 28745 transitions. [2021-06-05 22:32:53,019 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) [2021-06-05 22:32:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6618 states and 28745 transitions. [2021-06-05 22:32:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:53,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:53,030 INFO L554 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] [2021-06-05 22:32:53,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 22:32:53,231 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1105113426, now seen corresponding path program 61 times [2021-06-05 22:32:53,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:53,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167098875] [2021-06-05 22:32:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:53,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167098875] [2021-06-05 22:32:53,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167098875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514255023] [2021-06-05 22:32:53,441 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 [2021-06-05 22:32:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:32:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:53,811 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 [2021-06-05 22:32:53,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:53,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:53,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:53,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:32:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:53,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514255023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:53,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:53,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:32:53,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827388987] [2021-06-05 22:32:53,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:53,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:53,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:53,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:53,871 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) [2021-06-05 22:32:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:55,017 INFO L93 Difference]: Finished difference Result 7218 states and 30949 transitions. [2021-06-05 22:32:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:32:55,017 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 [2021-06-05 22:32:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:55,033 INFO L225 Difference]: With dead ends: 7218 [2021-06-05 22:32:55,033 INFO L226 Difference]: Without dead ends: 7163 [2021-06-05 22:32:55,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 971.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:32:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2021-06-05 22:32:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 6624. [2021-06-05 22:32:55,123 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) [2021-06-05 22:32:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 28760 transitions. [2021-06-05 22:32:55,139 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 28760 transitions. Word has length 33 [2021-06-05 22:32:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:55,139 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 28760 transitions. [2021-06-05 22:32:55,139 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) [2021-06-05 22:32:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 28760 transitions. [2021-06-05 22:32:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:55,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:55,150 INFO L554 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] [2021-06-05 22:32:55,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 22:32:55,350 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1571821348, now seen corresponding path program 62 times [2021-06-05 22:32:55,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:55,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136577084] [2021-06-05 22:32:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:55,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136577084] [2021-06-05 22:32:55,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136577084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:55,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205667725] [2021-06-05 22:32:55,527 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 [2021-06-05 22:32:55,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:55,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:55,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:32:55,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:55,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:55,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:55,767 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 [2021-06-05 22:32:55,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:55,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:55,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:55,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 22:32:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205667725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:55,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:55,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:32:55,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007667346] [2021-06-05 22:32:55,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:55,905 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) [2021-06-05 22:32:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,471 INFO L93 Difference]: Finished difference Result 7256 states and 31130 transitions. [2021-06-05 22:32:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:32:57,471 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 [2021-06-05 22:32:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,486 INFO L225 Difference]: With dead ends: 7256 [2021-06-05 22:32:57,487 INFO L226 Difference]: Without dead ends: 7216 [2021-06-05 22:32:57,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1273.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:32:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7216 states. [2021-06-05 22:32:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7216 to 6606. [2021-06-05 22:32:57,583 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) [2021-06-05 22:32:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 28683 transitions. [2021-06-05 22:32:57,600 INFO L78 Accepts]: Start accepts. Automaton has 6606 states and 28683 transitions. Word has length 33 [2021-06-05 22:32:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,600 INFO L482 AbstractCegarLoop]: Abstraction has 6606 states and 28683 transitions. [2021-06-05 22:32:57,600 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) [2021-06-05 22:32:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6606 states and 28683 transitions. [2021-06-05 22:32:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:32:57,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,611 INFO L554 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] [2021-06-05 22:32:57,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 22:32:57,812 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:57,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,812 INFO L82 PathProgramCache]: Analyzing trace with hash 506133940, now seen corresponding path program 63 times [2021-06-05 22:32:57,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992044567] [2021-06-05 22:32:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992044567] [2021-06-05 22:32:58,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992044567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227611272] [2021-06-05 22:32:58,040 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 [2021-06-05 22:32:58,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:58,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:32:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:58,309 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-06-05 22:32:58,309 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 [2021-06-05 22:32:58,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:58,473 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 22:32:58,474 INFO L628 ElimStorePlain]: treesize reduction 75, result has 59.9 percent of original size [2021-06-05 22:32:58,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:58,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:112 [2021-06-05 22:32:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227611272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:58,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:32:58,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562009839] [2021-06-05 22:32:58,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:32:58,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:58,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:32:58,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:58,799 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) [2021-06-05 22:32:59,261 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 22:32:59,872 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 22:33:01,917 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-06-05 22:33:02,158 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 22:33:02,841 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 22:33:03,004 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-05 22:33:03,210 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 22:33:03,383 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 22:33:03,585 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 22:33:03,779 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 22:33:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:03,795 INFO L93 Difference]: Finished difference Result 7811 states and 33358 transitions. [2021-06-05 22:33:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:33:03,796 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 [2021-06-05 22:33:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:03,813 INFO L225 Difference]: With dead ends: 7811 [2021-06-05 22:33:03,813 INFO L226 Difference]: Without dead ends: 7796 [2021-06-05 22:33:03,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 4285.5ms TimeCoverageRelationStatistics Valid=503, Invalid=4327, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:33:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-06-05 22:33:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 6722. [2021-06-05 22:33:03,914 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) [2021-06-05 22:33:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 29229 transitions. [2021-06-05 22:33:03,931 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 29229 transitions. Word has length 33 [2021-06-05 22:33:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:03,931 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 29229 transitions. [2021-06-05 22:33:03,931 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) [2021-06-05 22:33:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 29229 transitions. [2021-06-05 22:33:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:03,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:03,942 INFO L554 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] [2021-06-05 22:33:04,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 22:33:04,143 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash 317292374, now seen corresponding path program 64 times [2021-06-05 22:33:04,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:04,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345520841] [2021-06-05 22:33:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:04,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:04,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345520841] [2021-06-05 22:33:04,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345520841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:04,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327019250] [2021-06-05 22:33:04,421 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 [2021-06-05 22:33:04,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:04,630 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 [2021-06-05 22:33:04,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:04,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:04,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:04,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:33:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:04,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327019250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:04,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:04,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198300431] [2021-06-05 22:33:04,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:04,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:04,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:04,718 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) [2021-06-05 22:33:05,163 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 22:33:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:07,076 INFO L93 Difference]: Finished difference Result 7950 states and 33911 transitions. [2021-06-05 22:33:07,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:33:07,077 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 [2021-06-05 22:33:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:07,094 INFO L225 Difference]: With dead ends: 7950 [2021-06-05 22:33:07,094 INFO L226 Difference]: Without dead ends: 7932 [2021-06-05 22:33:07,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1835.4ms TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:33:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7932 states. [2021-06-05 22:33:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7932 to 6738. [2021-06-05 22:33:07,193 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) [2021-06-05 22:33:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 29284 transitions. [2021-06-05 22:33:07,210 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 29284 transitions. Word has length 33 [2021-06-05 22:33:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:07,210 INFO L482 AbstractCegarLoop]: Abstraction has 6738 states and 29284 transitions. [2021-06-05 22:33:07,210 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) [2021-06-05 22:33:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 29284 transitions. [2021-06-05 22:33:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:07,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:07,221 INFO L554 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] [2021-06-05 22:33:07,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:07,422 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1351101068, now seen corresponding path program 65 times [2021-06-05 22:33:07,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:07,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652088591] [2021-06-05 22:33:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:07,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652088591] [2021-06-05 22:33:07,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652088591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851770674] [2021-06-05 22:33:07,649 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 [2021-06-05 22:33:07,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:07,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:07,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:33:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:07,870 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 [2021-06-05 22:33:07,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:07,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:07,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:07,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2021-06-05 22:33:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851770674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:07,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:07,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:33:07,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965505861] [2021-06-05 22:33:07,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:07,982 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) [2021-06-05 22:33:09,304 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 22:33:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:10,981 INFO L93 Difference]: Finished difference Result 8797 states and 36618 transitions. [2021-06-05 22:33:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:33:10,981 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 [2021-06-05 22:33:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:11,000 INFO L225 Difference]: With dead ends: 8797 [2021-06-05 22:33:11,000 INFO L226 Difference]: Without dead ends: 8739 [2021-06-05 22:33:11,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2400.1ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:33:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8739 states. [2021-06-05 22:33:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8739 to 6678. [2021-06-05 22:33:11,102 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) [2021-06-05 22:33:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 29021 transitions. [2021-06-05 22:33:11,119 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 29021 transitions. Word has length 33 [2021-06-05 22:33:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:11,119 INFO L482 AbstractCegarLoop]: Abstraction has 6678 states and 29021 transitions. [2021-06-05 22:33:11,119 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) [2021-06-05 22:33:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 29021 transitions. [2021-06-05 22:33:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:11,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:11,130 INFO L554 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] [2021-06-05 22:33:11,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:11,330 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2101567988, now seen corresponding path program 66 times [2021-06-05 22:33:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:11,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245496557] [2021-06-05 22:33:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:11,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:11,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245496557] [2021-06-05 22:33:11,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245496557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:11,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728803242] [2021-06-05 22:33:11,519 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 [2021-06-05 22:33:11,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:33:11,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:11,821 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 22:33:11,821 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 [2021-06-05 22:33:11,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:11,986 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-05 22:33:11,986 INFO L628 ElimStorePlain]: treesize reduction 87, result has 50.0 percent of original size [2021-06-05 22:33:12,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:12,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:286 [2021-06-05 22:33:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:12,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728803242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:12,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:12,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:33:12,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852802205] [2021-06-05 22:33:12,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:33:12,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:12,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:33:12,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:12,257 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) [2021-06-05 22:33:13,029 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 22:33:14,752 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 22:33:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:14,985 INFO L93 Difference]: Finished difference Result 7738 states and 33148 transitions. [2021-06-05 22:33:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:33:14,985 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 [2021-06-05 22:33:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:15,002 INFO L225 Difference]: With dead ends: 7738 [2021-06-05 22:33:15,002 INFO L226 Difference]: Without dead ends: 7698 [2021-06-05 22:33:15,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 2383.9ms TimeCoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:33:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7698 states. [2021-06-05 22:33:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7698 to 6699. [2021-06-05 22:33:15,092 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) [2021-06-05 22:33:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6699 states to 6699 states and 29128 transitions. [2021-06-05 22:33:15,109 INFO L78 Accepts]: Start accepts. Automaton has 6699 states and 29128 transitions. Word has length 33 [2021-06-05 22:33:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:15,109 INFO L482 AbstractCegarLoop]: Abstraction has 6699 states and 29128 transitions. [2021-06-05 22:33:15,109 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) [2021-06-05 22:33:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 6699 states and 29128 transitions. [2021-06-05 22:33:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:15,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:15,120 INFO L554 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] [2021-06-05 22:33:15,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:15,320 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash 431131726, now seen corresponding path program 67 times [2021-06-05 22:33:15,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:15,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789800463] [2021-06-05 22:33:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:15,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789800463] [2021-06-05 22:33:15,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789800463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791277997] [2021-06-05 22:33:15,492 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 [2021-06-05 22:33:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:15,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:15,729 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 [2021-06-05 22:33:15,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:15,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:33:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791277997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:15,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:33:15,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719593958] [2021-06-05 22:33:15,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:15,790 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) [2021-06-05 22:33:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:17,034 INFO L93 Difference]: Finished difference Result 7394 states and 31574 transitions. [2021-06-05 22:33:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:33:17,034 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 [2021-06-05 22:33:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:17,051 INFO L225 Difference]: With dead ends: 7394 [2021-06-05 22:33:17,051 INFO L226 Difference]: Without dead ends: 7339 [2021-06-05 22:33:17,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 922.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:33:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2021-06-05 22:33:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 6702. [2021-06-05 22:33:17,143 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) [2021-06-05 22:33:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6702 states to 6702 states and 29137 transitions. [2021-06-05 22:33:17,160 INFO L78 Accepts]: Start accepts. Automaton has 6702 states and 29137 transitions. Word has length 33 [2021-06-05 22:33:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:17,160 INFO L482 AbstractCegarLoop]: Abstraction has 6702 states and 29137 transitions. [2021-06-05 22:33:17,160 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) [2021-06-05 22:33:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 6702 states and 29137 transitions. [2021-06-05 22:33:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:17,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:17,171 INFO L554 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] [2021-06-05 22:33:17,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 22:33:17,371 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash -35576196, now seen corresponding path program 68 times [2021-06-05 22:33:17,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:17,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168503590] [2021-06-05 22:33:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:17,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168503590] [2021-06-05 22:33:17,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168503590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316959367] [2021-06-05 22:33:17,553 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 [2021-06-05 22:33:17,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:17,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:17,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:33:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:17,796 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 [2021-06-05 22:33:17,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:17,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:17,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:17,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-06-05 22:33:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:17,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316959367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:17,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:17,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:33:17,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894262936] [2021-06-05 22:33:17,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:33:17,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:17,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:33:17,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:17,914 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) [2021-06-05 22:33:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:19,112 INFO L93 Difference]: Finished difference Result 7454 states and 31805 transitions. [2021-06-05 22:33:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:33:19,112 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 [2021-06-05 22:33:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:19,128 INFO L225 Difference]: With dead ends: 7454 [2021-06-05 22:33:19,128 INFO L226 Difference]: Without dead ends: 7374 [2021-06-05 22:33:19,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1137.5ms TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:33:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7374 states. [2021-06-05 22:33:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7374 to 6684. [2021-06-05 22:33:19,220 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) [2021-06-05 22:33:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6684 states to 6684 states and 29039 transitions. [2021-06-05 22:33:19,237 INFO L78 Accepts]: Start accepts. Automaton has 6684 states and 29039 transitions. Word has length 33 [2021-06-05 22:33:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:19,238 INFO L482 AbstractCegarLoop]: Abstraction has 6684 states and 29039 transitions. [2021-06-05 22:33:19,238 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) [2021-06-05 22:33:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 6684 states and 29039 transitions. [2021-06-05 22:33:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:19,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:19,248 INFO L554 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] [2021-06-05 22:33:19,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 22:33:19,449 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1331921396, now seen corresponding path program 69 times [2021-06-05 22:33:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:19,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338344812] [2021-06-05 22:33:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:19,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338344812] [2021-06-05 22:33:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338344812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771947188] [2021-06-05 22:33:19,648 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 [2021-06-05 22:33:19,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:19,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:19,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:19,983 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:33:19,984 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 [2021-06-05 22:33:19,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:19,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:19,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:19,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 22:33:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:20,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771947188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:20,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:20,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:33:20,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108602631] [2021-06-05 22:33:20,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:33:20,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:20,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:33:20,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:20,092 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) [2021-06-05 22:33:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:21,639 INFO L93 Difference]: Finished difference Result 7199 states and 30900 transitions. [2021-06-05 22:33:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:33:21,639 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 [2021-06-05 22:33:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:21,655 INFO L225 Difference]: With dead ends: 7199 [2021-06-05 22:33:21,655 INFO L226 Difference]: Without dead ends: 7128 [2021-06-05 22:33:21,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1266.0ms TimeCoverageRelationStatistics Valid=177, Invalid=1893, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:33:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2021-06-05 22:33:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 6687. [2021-06-05 22:33:21,743 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) [2021-06-05 22:33:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 29045 transitions. [2021-06-05 22:33:21,761 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 29045 transitions. Word has length 33 [2021-06-05 22:33:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:21,761 INFO L482 AbstractCegarLoop]: Abstraction has 6687 states and 29045 transitions. [2021-06-05 22:33:21,761 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) [2021-06-05 22:33:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 29045 transitions. [2021-06-05 22:33:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:21,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:21,772 INFO L554 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] [2021-06-05 22:33:21,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:21,973 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:21,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2012246164, now seen corresponding path program 70 times [2021-06-05 22:33:21,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:21,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436958771] [2021-06-05 22:33:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:22,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:22,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436958771] [2021-06-05 22:33:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436958771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:22,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369262335] [2021-06-05 22:33:22,164 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 [2021-06-05 22:33:22,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:22,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:22,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:22,368 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 [2021-06-05 22:33:22,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:22,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:22,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:22,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:33:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:22,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369262335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:22,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:22,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:22,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744580717] [2021-06-05 22:33:22,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:22,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:22,459 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) [2021-06-05 22:33:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:24,126 INFO L93 Difference]: Finished difference Result 8321 states and 35424 transitions. [2021-06-05 22:33:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:33:24,126 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 [2021-06-05 22:33:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:24,150 INFO L225 Difference]: With dead ends: 8321 [2021-06-05 22:33:24,150 INFO L226 Difference]: Without dead ends: 8276 [2021-06-05 22:33:24,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1173.6ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:33:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-05 22:33:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6858. [2021-06-05 22:33:24,272 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) [2021-06-05 22:33:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 29843 transitions. [2021-06-05 22:33:24,289 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 29843 transitions. Word has length 33 [2021-06-05 22:33:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:24,290 INFO L482 AbstractCegarLoop]: Abstraction has 6858 states and 29843 transitions. [2021-06-05 22:33:24,290 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) [2021-06-05 22:33:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 29843 transitions. [2021-06-05 22:33:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:24,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:24,300 INFO L554 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] [2021-06-05 22:33:24,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-05 22:33:24,501 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 72346634, now seen corresponding path program 71 times [2021-06-05 22:33:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:24,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985595038] [2021-06-05 22:33:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:24,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:24,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985595038] [2021-06-05 22:33:24,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985595038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:24,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564393420] [2021-06-05 22:33:24,698 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 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 [2021-06-05 22:33:24,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:33:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:24,917 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 [2021-06-05 22:33:24,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:24,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:24,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:24,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:33:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:24,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564393420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:24,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:24,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:33:24,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674756238] [2021-06-05 22:33:24,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:24,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:24,998 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) [2021-06-05 22:33:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:26,343 INFO L93 Difference]: Finished difference Result 8197 states and 34940 transitions. [2021-06-05 22:33:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:33:26,343 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 [2021-06-05 22:33:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:26,362 INFO L225 Difference]: With dead ends: 8197 [2021-06-05 22:33:26,362 INFO L226 Difference]: Without dead ends: 8152 [2021-06-05 22:33:26,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 994.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:33:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2021-06-05 22:33:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 6814. [2021-06-05 22:33:26,468 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) [2021-06-05 22:33:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6814 states to 6814 states and 29662 transitions. [2021-06-05 22:33:26,560 INFO L78 Accepts]: Start accepts. Automaton has 6814 states and 29662 transitions. Word has length 33 [2021-06-05 22:33:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:26,560 INFO L482 AbstractCegarLoop]: Abstraction has 6814 states and 29662 transitions. [2021-06-05 22:33:26,561 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) [2021-06-05 22:33:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6814 states and 29662 transitions. [2021-06-05 22:33:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:26,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:26,573 INFO L554 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] [2021-06-05 22:33:26,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:26,773 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash 63209602, now seen corresponding path program 72 times [2021-06-05 22:33:26,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:26,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431584418] [2021-06-05 22:33:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:26,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431584418] [2021-06-05 22:33:26,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431584418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126721241] [2021-06-05 22:33:26,990 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 [2021-06-05 22:33:27,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:33:27,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:33:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:27,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:27,280 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 [2021-06-05 22:33:27,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:27,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:27,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:27,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:39 [2021-06-05 22:33:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:27,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126721241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:27,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:27,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:33:27,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659195399] [2021-06-05 22:33:27,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:33:27,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:27,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:33:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:27,469 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) [2021-06-05 22:33:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:28,492 INFO L93 Difference]: Finished difference Result 7608 states and 32846 transitions. [2021-06-05 22:33:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:33:28,493 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 [2021-06-05 22:33:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:28,510 INFO L225 Difference]: With dead ends: 7608 [2021-06-05 22:33:28,510 INFO L226 Difference]: Without dead ends: 7593 [2021-06-05 22:33:28,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 860.3ms TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:33:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2021-06-05 22:33:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6808. [2021-06-05 22:33:28,604 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) [2021-06-05 22:33:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 29643 transitions. [2021-06-05 22:33:28,622 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 29643 transitions. Word has length 33 [2021-06-05 22:33:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:28,622 INFO L482 AbstractCegarLoop]: Abstraction has 6808 states and 29643 transitions. [2021-06-05 22:33:28,622 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) [2021-06-05 22:33:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 29643 transitions. [2021-06-05 22:33:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:28,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:28,633 INFO L554 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] [2021-06-05 22:33:28,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:28,833 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash -62958544, now seen corresponding path program 73 times [2021-06-05 22:33:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:28,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802062710] [2021-06-05 22:33:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:29,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802062710] [2021-06-05 22:33:29,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802062710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943414946] [2021-06-05 22:33:29,009 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 [2021-06-05 22:33:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:29,175 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 [2021-06-05 22:33:29,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:29,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:33:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943414946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:29,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:29,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352975050] [2021-06-05 22:33:29,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:29,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:29,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:29,282 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) [2021-06-05 22:33:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:30,894 INFO L93 Difference]: Finished difference Result 7949 states and 34134 transitions. [2021-06-05 22:33:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:33:30,894 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 [2021-06-05 22:33:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:30,912 INFO L225 Difference]: With dead ends: 7949 [2021-06-05 22:33:30,912 INFO L226 Difference]: Without dead ends: 7904 [2021-06-05 22:33:30,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1114.5ms TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:33:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2021-06-05 22:33:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 6943. [2021-06-05 22:33:31,007 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) [2021-06-05 22:33:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 30255 transitions. [2021-06-05 22:33:31,024 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 30255 transitions. Word has length 33 [2021-06-05 22:33:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:31,025 INFO L482 AbstractCegarLoop]: Abstraction has 6943 states and 30255 transitions. [2021-06-05 22:33:31,025 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) [2021-06-05 22:33:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 30255 transitions. [2021-06-05 22:33:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:31,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:31,039 INFO L554 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] [2021-06-05 22:33:31,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 22:33:31,244 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2021634254, now seen corresponding path program 74 times [2021-06-05 22:33:31,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:31,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872084328] [2021-06-05 22:33:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:31,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872084328] [2021-06-05 22:33:31,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872084328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045738333] [2021-06-05 22:33:31,413 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 [2021-06-05 22:33:31,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:31,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:33:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:31,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:31,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:31,589 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 [2021-06-05 22:33:31,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:31,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:31,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:31,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-05 22:33:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045738333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:31,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:33:31,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321769209] [2021-06-05 22:33:31,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:31,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:31,773 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) [2021-06-05 22:33:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:33,564 INFO L93 Difference]: Finished difference Result 7629 states and 32933 transitions. [2021-06-05 22:33:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:33:33,565 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 [2021-06-05 22:33:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:33,581 INFO L225 Difference]: With dead ends: 7629 [2021-06-05 22:33:33,582 INFO L226 Difference]: Without dead ends: 7594 [2021-06-05 22:33:33,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1515.3ms TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:33:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-06-05 22:33:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6877. [2021-06-05 22:33:33,677 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) [2021-06-05 22:33:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 29993 transitions. [2021-06-05 22:33:33,695 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 29993 transitions. Word has length 33 [2021-06-05 22:33:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:33,695 INFO L482 AbstractCegarLoop]: Abstraction has 6877 states and 29993 transitions. [2021-06-05 22:33:33,695 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) [2021-06-05 22:33:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 29993 transitions. [2021-06-05 22:33:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:33,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:33,706 INFO L554 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] [2021-06-05 22:33:33,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 22:33:33,907 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1629565944, now seen corresponding path program 75 times [2021-06-05 22:33:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:33,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969402252] [2021-06-05 22:33:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:34,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969402252] [2021-06-05 22:33:34,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969402252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108502523] [2021-06-05 22:33:34,109 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 [2021-06-05 22:33:34,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:33:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:34,347 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-06-05 22:33:34,347 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 [2021-06-05 22:33:34,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:34,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:34,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:34,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:71 [2021-06-05 22:33:34,688 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 22:33:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108502523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:34,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:33:34,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551514337] [2021-06-05 22:33:34,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:33:34,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:34,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:33:34,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:34,940 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) [2021-06-05 22:33:35,432 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-06-05 22:33:35,795 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 22:33:36,073 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-05 22:33:37,305 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 22:33:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:37,980 INFO L93 Difference]: Finished difference Result 7996 states and 34415 transitions. [2021-06-05 22:33:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:33:37,981 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 [2021-06-05 22:33:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:37,999 INFO L225 Difference]: With dead ends: 7996 [2021-06-05 22:33:37,999 INFO L226 Difference]: Without dead ends: 7973 [2021-06-05 22:33:38,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2955.8ms TimeCoverageRelationStatistics Valid=398, Invalid=2908, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:33:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2021-06-05 22:33:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 7066. [2021-06-05 22:33:38,101 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) [2021-06-05 22:33:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 30871 transitions. [2021-06-05 22:33:38,120 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 30871 transitions. Word has length 33 [2021-06-05 22:33:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:38,120 INFO L482 AbstractCegarLoop]: Abstraction has 7066 states and 30871 transitions. [2021-06-05 22:33:38,120 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) [2021-06-05 22:33:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 30871 transitions. [2021-06-05 22:33:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:38,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:38,132 INFO L554 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] [2021-06-05 22:33:38,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 22:33:38,332 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash 808166344, now seen corresponding path program 76 times [2021-06-05 22:33:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:38,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419652200] [2021-06-05 22:33:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:38,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419652200] [2021-06-05 22:33:38,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419652200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167484397] [2021-06-05 22:33:38,509 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 [2021-06-05 22:33:38,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:38,671 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 [2021-06-05 22:33:38,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:38,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:38,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:38,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:33:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167484397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:38,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:33:38,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959769674] [2021-06-05 22:33:38,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:38,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:38,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:38,772 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) [2021-06-05 22:33:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:39,725 INFO L93 Difference]: Finished difference Result 8285 states and 35451 transitions. [2021-06-05 22:33:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:33:39,725 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 [2021-06-05 22:33:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:39,744 INFO L225 Difference]: With dead ends: 8285 [2021-06-05 22:33:39,744 INFO L226 Difference]: Without dead ends: 8248 [2021-06-05 22:33:39,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 873.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:33:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-06-05 22:33:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 7230. [2021-06-05 22:33:39,853 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) [2021-06-05 22:33:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 31610 transitions. [2021-06-05 22:33:39,873 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 31610 transitions. Word has length 33 [2021-06-05 22:33:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:39,873 INFO L482 AbstractCegarLoop]: Abstraction has 7230 states and 31610 transitions. [2021-06-05 22:33:39,873 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) [2021-06-05 22:33:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 31610 transitions. [2021-06-05 22:33:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:39,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:39,885 INFO L554 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] [2021-06-05 22:33:40,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:40,086 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1218384580, now seen corresponding path program 77 times [2021-06-05 22:33:40,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:40,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030652315] [2021-06-05 22:33:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030652315] [2021-06-05 22:33:40,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030652315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117343591] [2021-06-05 22:33:40,246 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 [2021-06-05 22:33:40,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:33:40,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:40,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:40,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:40,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:40,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:40,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:33:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117343591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:40,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:33:40,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019102216] [2021-06-05 22:33:40,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:40,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:40,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:40,502 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) [2021-06-05 22:33:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:41,557 INFO L93 Difference]: Finished difference Result 8304 states and 35535 transitions. [2021-06-05 22:33:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:33:41,557 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 [2021-06-05 22:33:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:41,575 INFO L225 Difference]: With dead ends: 8304 [2021-06-05 22:33:41,576 INFO L226 Difference]: Without dead ends: 8273 [2021-06-05 22:33:41,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 821.7ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:33:41,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8273 states. [2021-06-05 22:33:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8273 to 7199. [2021-06-05 22:33:41,686 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) [2021-06-05 22:33:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 31480 transitions. [2021-06-05 22:33:41,704 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 31480 transitions. Word has length 33 [2021-06-05 22:33:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:41,704 INFO L482 AbstractCegarLoop]: Abstraction has 7199 states and 31480 transitions. [2021-06-05 22:33:41,704 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) [2021-06-05 22:33:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 31480 transitions. [2021-06-05 22:33:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:41,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:41,716 INFO L554 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] [2021-06-05 22:33:41,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 22:33:41,916 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash -34131896, now seen corresponding path program 78 times [2021-06-05 22:33:41,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:41,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025341398] [2021-06-05 22:33:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:42,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025341398] [2021-06-05 22:33:42,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025341398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111494171] [2021-06-05 22:33:42,114 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 [2021-06-05 22:33:42,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:33:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:42,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:42,314 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 [2021-06-05 22:33:42,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:42,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:42,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:42,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:33:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111494171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:42,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:33:42,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681894575] [2021-06-05 22:33:42,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:33:42,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:33:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:42,580 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) [2021-06-05 22:33:42,708 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 22:33:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:44,671 INFO L93 Difference]: Finished difference Result 8292 states and 36024 transitions. [2021-06-05 22:33:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:33:44,671 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 [2021-06-05 22:33:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:44,689 INFO L225 Difference]: With dead ends: 8292 [2021-06-05 22:33:44,690 INFO L226 Difference]: Without dead ends: 8273 [2021-06-05 22:33:44,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1857.6ms TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:33:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8273 states. [2021-06-05 22:33:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8273 to 7196. [2021-06-05 22:33:44,790 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) [2021-06-05 22:33:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 31470 transitions. [2021-06-05 22:33:44,809 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 31470 transitions. Word has length 33 [2021-06-05 22:33:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:44,809 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 31470 transitions. [2021-06-05 22:33:44,809 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) [2021-06-05 22:33:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 31470 transitions. [2021-06-05 22:33:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:44,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:44,820 INFO L554 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] [2021-06-05 22:33:45,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 22:33:45,021 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2046764810, now seen corresponding path program 79 times [2021-06-05 22:33:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086139224] [2021-06-05 22:33:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:45,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086139224] [2021-06-05 22:33:45,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086139224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414665688] [2021-06-05 22:33:45,243 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 [2021-06-05 22:33:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:45,403 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 [2021-06-05 22:33:45,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:45,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:45,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:45,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:33:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:45,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414665688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:45,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:45,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:45,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963869720] [2021-06-05 22:33:45,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:45,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:45,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:45,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:45,508 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) [2021-06-05 22:33:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:47,451 INFO L93 Difference]: Finished difference Result 9100 states and 38003 transitions. [2021-06-05 22:33:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:33:47,452 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 [2021-06-05 22:33:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:47,471 INFO L225 Difference]: With dead ends: 9100 [2021-06-05 22:33:47,471 INFO L226 Difference]: Without dead ends: 9042 [2021-06-05 22:33:47,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1616.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:33:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-06-05 22:33:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7280. [2021-06-05 22:33:47,581 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) [2021-06-05 22:33:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7280 states to 7280 states and 31862 transitions. [2021-06-05 22:33:47,600 INFO L78 Accepts]: Start accepts. Automaton has 7280 states and 31862 transitions. Word has length 33 [2021-06-05 22:33:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:47,600 INFO L482 AbstractCegarLoop]: Abstraction has 7280 states and 31862 transitions. [2021-06-05 22:33:47,600 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) [2021-06-05 22:33:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7280 states and 31862 transitions. [2021-06-05 22:33:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:47,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:47,612 INFO L554 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] [2021-06-05 22:33:47,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 22:33:47,813 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1706221430, now seen corresponding path program 80 times [2021-06-05 22:33:47,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:47,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119575579] [2021-06-05 22:33:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:48,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:48,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119575579] [2021-06-05 22:33:48,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119575579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:48,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517001542] [2021-06-05 22:33:48,048 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 [2021-06-05 22:33:48,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:33:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:48,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:48,222 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 [2021-06-05 22:33:48,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:48,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:48,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:48,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-05 22:33:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:48,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517001542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:48,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:48,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:33:48,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882677839] [2021-06-05 22:33:48,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:33:48,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:48,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:33:48,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:48,398 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) [2021-06-05 22:33:49,041 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 22:33:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:50,458 INFO L93 Difference]: Finished difference Result 8139 states and 34976 transitions. [2021-06-05 22:33:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:33:50,458 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 [2021-06-05 22:33:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:50,477 INFO L225 Difference]: With dead ends: 8139 [2021-06-05 22:33:50,478 INFO L226 Difference]: Without dead ends: 8129 [2021-06-05 22:33:50,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1857.6ms TimeCoverageRelationStatistics Valid=394, Invalid=2056, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:33:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8129 states. [2021-06-05 22:33:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8129 to 7321. [2021-06-05 22:33:50,589 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) [2021-06-05 22:33:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 32015 transitions. [2021-06-05 22:33:50,610 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 32015 transitions. Word has length 33 [2021-06-05 22:33:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:50,610 INFO L482 AbstractCegarLoop]: Abstraction has 7321 states and 32015 transitions. [2021-06-05 22:33:50,610 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) [2021-06-05 22:33:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 32015 transitions. [2021-06-05 22:33:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:50,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:50,623 INFO L554 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] [2021-06-05 22:33:50,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 22:33:50,823 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash 37827988, now seen corresponding path program 81 times [2021-06-05 22:33:50,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:50,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166477667] [2021-06-05 22:33:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166477667] [2021-06-05 22:33:51,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166477667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752552933] [2021-06-05 22:33:51,120 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 [2021-06-05 22:33:51,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:33:51,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:51,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:51,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:51,284 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 [2021-06-05 22:33:51,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:51,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:51,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:51,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:33:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:51,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752552933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:51,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:51,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:33:51,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117039329] [2021-06-05 22:33:51,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:33:51,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:51,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:33:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:51,519 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) [2021-06-05 22:33:52,320 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-05 22:33:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:54,495 INFO L93 Difference]: Finished difference Result 9160 states and 38074 transitions. [2021-06-05 22:33:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:33:54,495 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 [2021-06-05 22:33:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:54,515 INFO L225 Difference]: With dead ends: 9160 [2021-06-05 22:33:54,515 INFO L226 Difference]: Without dead ends: 9129 [2021-06-05 22:33:54,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2703.5ms TimeCoverageRelationStatistics Valid=557, Invalid=3475, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:33:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-06-05 22:33:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7321. [2021-06-05 22:33:54,636 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) [2021-06-05 22:33:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 32012 transitions. [2021-06-05 22:33:54,657 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 32012 transitions. Word has length 33 [2021-06-05 22:33:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:54,657 INFO L482 AbstractCegarLoop]: Abstraction has 7321 states and 32012 transitions. [2021-06-05 22:33:54,657 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) [2021-06-05 22:33:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 32012 transitions. [2021-06-05 22:33:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:54,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:54,669 INFO L554 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] [2021-06-05 22:33:54,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:54,870 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:54,870 INFO L82 PathProgramCache]: Analyzing trace with hash -287475670, now seen corresponding path program 82 times [2021-06-05 22:33:54,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:54,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445767766] [2021-06-05 22:33:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:55,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:55,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445767766] [2021-06-05 22:33:55,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445767766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:55,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829842789] [2021-06-05 22:33:55,204 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 [2021-06-05 22:33:55,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:55,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:55,367 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 [2021-06-05 22:33:55,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:55,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:55,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:55,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:33:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829842789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:55,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:55,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:55,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976563079] [2021-06-05 22:33:55,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:55,489 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) [2021-06-05 22:33:56,109 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 22:33:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:57,354 INFO L93 Difference]: Finished difference Result 8782 states and 37424 transitions. [2021-06-05 22:33:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:33:57,355 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 [2021-06-05 22:33:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:57,375 INFO L225 Difference]: With dead ends: 8782 [2021-06-05 22:33:57,375 INFO L226 Difference]: Without dead ends: 8736 [2021-06-05 22:33:57,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1734.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:33:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8736 states. [2021-06-05 22:33:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8736 to 7382. [2021-06-05 22:33:57,500 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) [2021-06-05 22:33:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 32251 transitions. [2021-06-05 22:33:57,520 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 32251 transitions. Word has length 33 [2021-06-05 22:33:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:57,520 INFO L482 AbstractCegarLoop]: Abstraction has 7382 states and 32251 transitions. [2021-06-05 22:33:57,520 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) [2021-06-05 22:33:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 32251 transitions. [2021-06-05 22:33:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:33:57,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:57,533 INFO L554 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] [2021-06-05 22:33:57,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:57,734 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:57,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2144710678, now seen corresponding path program 83 times [2021-06-05 22:33:57,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:57,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629420880] [2021-06-05 22:33:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:57,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:57,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629420880] [2021-06-05 22:33:57,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629420880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:57,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915173779] [2021-06-05 22:33:57,975 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 [2021-06-05 22:33:58,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:33:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:33:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:58,144 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 [2021-06-05 22:33:58,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:58,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:58,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:58,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:33:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:58,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915173779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:58,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:58,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:33:58,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807788479] [2021-06-05 22:33:58,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:58,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:58,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:58,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:58,257 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) [2021-06-05 22:33:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:59,987 INFO L93 Difference]: Finished difference Result 9441 states and 39121 transitions. [2021-06-05 22:33:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:33:59,987 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 [2021-06-05 22:33:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:00,007 INFO L225 Difference]: With dead ends: 9441 [2021-06-05 22:34:00,007 INFO L226 Difference]: Without dead ends: 9343 [2021-06-05 22:34:00,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1551.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1590, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:34:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2021-06-05 22:34:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 7330. [2021-06-05 22:34:00,121 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) [2021-06-05 22:34:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7330 states to 7330 states and 32042 transitions. [2021-06-05 22:34:00,140 INFO L78 Accepts]: Start accepts. Automaton has 7330 states and 32042 transitions. Word has length 33 [2021-06-05 22:34:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:00,140 INFO L482 AbstractCegarLoop]: Abstraction has 7330 states and 32042 transitions. [2021-06-05 22:34:00,140 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) [2021-06-05 22:34:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7330 states and 32042 transitions. [2021-06-05 22:34:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:00,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:00,151 INFO L554 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] [2021-06-05 22:34:00,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:00,352 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 681595086, now seen corresponding path program 84 times [2021-06-05 22:34:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:00,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110437682] [2021-06-05 22:34:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:00,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110437682] [2021-06-05 22:34:00,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110437682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:00,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101242447] [2021-06-05 22:34:00,635 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 [2021-06-05 22:34:00,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:34:00,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:00,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:34:00,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:00,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:00,798 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 [2021-06-05 22:34:00,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:00,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:00,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:00,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:34:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:00,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101242447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:00,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:00,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:34:00,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889458846] [2021-06-05 22:34:00,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:34:00,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:34:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:34:00,987 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) [2021-06-05 22:34:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:04,023 INFO L93 Difference]: Finished difference Result 8529 states and 36495 transitions. [2021-06-05 22:34:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:34:04,024 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 [2021-06-05 22:34:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:04,043 INFO L225 Difference]: With dead ends: 8529 [2021-06-05 22:34:04,043 INFO L226 Difference]: Without dead ends: 8483 [2021-06-05 22:34:04,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2554.8ms TimeCoverageRelationStatistics Valid=580, Invalid=3580, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:34:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8483 states. [2021-06-05 22:34:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8483 to 7448. [2021-06-05 22:34:04,151 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) [2021-06-05 22:34:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7448 states to 7448 states and 32591 transitions. [2021-06-05 22:34:04,170 INFO L78 Accepts]: Start accepts. Automaton has 7448 states and 32591 transitions. Word has length 33 [2021-06-05 22:34:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:04,170 INFO L482 AbstractCegarLoop]: Abstraction has 7448 states and 32591 transitions. [2021-06-05 22:34:04,171 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) [2021-06-05 22:34:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 7448 states and 32591 transitions. [2021-06-05 22:34:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:04,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:04,183 INFO L554 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] [2021-06-05 22:34:04,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 22:34:04,383 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:04,384 INFO L82 PathProgramCache]: Analyzing trace with hash 492753520, now seen corresponding path program 85 times [2021-06-05 22:34:04,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:04,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830192104] [2021-06-05 22:34:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:04,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:04,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830192104] [2021-06-05 22:34:04,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830192104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:04,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958193296] [2021-06-05 22:34:04,624 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 [2021-06-05 22:34:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:04,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:04,778 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 [2021-06-05 22:34:04,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:04,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:34:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:04,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958193296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:04,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:04,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:04,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834791498] [2021-06-05 22:34:04,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:04,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:04,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:04,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:04,879 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) [2021-06-05 22:34:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:06,592 INFO L93 Difference]: Finished difference Result 8674 states and 36998 transitions. [2021-06-05 22:34:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:34:06,592 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 [2021-06-05 22:34:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:06,611 INFO L225 Difference]: With dead ends: 8674 [2021-06-05 22:34:06,611 INFO L226 Difference]: Without dead ends: 8646 [2021-06-05 22:34:06,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1506.0ms TimeCoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:34:06,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-06-05 22:34:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 7453. [2021-06-05 22:34:06,723 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) [2021-06-05 22:34:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 32611 transitions. [2021-06-05 22:34:06,742 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 32611 transitions. Word has length 33 [2021-06-05 22:34:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:06,743 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 32611 transitions. [2021-06-05 22:34:06,743 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) [2021-06-05 22:34:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 32611 transitions. [2021-06-05 22:34:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:06,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:06,754 INFO L554 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] [2021-06-05 22:34:06,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 22:34:06,955 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:06,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639922, now seen corresponding path program 86 times [2021-06-05 22:34:06,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:06,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10270297] [2021-06-05 22:34:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:07,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:07,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10270297] [2021-06-05 22:34:07,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10270297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:07,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904897767] [2021-06-05 22:34:07,208 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 [2021-06-05 22:34:07,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:34:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:07,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:07,454 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 [2021-06-05 22:34:07,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:07,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:07,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:07,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-05 22:34:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:07,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904897767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:07,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:07,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:34:07,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746727462] [2021-06-05 22:34:07,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:07,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:07,637 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) [2021-06-05 22:34:08,686 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 22:34:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:10,059 INFO L93 Difference]: Finished difference Result 9335 states and 38912 transitions. [2021-06-05 22:34:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:34:10,060 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 [2021-06-05 22:34:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:10,080 INFO L225 Difference]: With dead ends: 9335 [2021-06-05 22:34:10,081 INFO L226 Difference]: Without dead ends: 9256 [2021-06-05 22:34:10,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2190.9ms TimeCoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:34:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9256 states. [2021-06-05 22:34:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9256 to 7413. [2021-06-05 22:34:10,210 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) [2021-06-05 22:34:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7413 states to 7413 states and 32442 transitions. [2021-06-05 22:34:10,235 INFO L78 Accepts]: Start accepts. Automaton has 7413 states and 32442 transitions. Word has length 33 [2021-06-05 22:34:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:10,235 INFO L482 AbstractCegarLoop]: Abstraction has 7413 states and 32442 transitions. [2021-06-05 22:34:10,235 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) [2021-06-05 22:34:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7413 states and 32442 transitions. [2021-06-05 22:34:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:10,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:10,248 INFO L554 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] [2021-06-05 22:34:10,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 22:34:10,449 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash 180638590, now seen corresponding path program 87 times [2021-06-05 22:34:10,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:10,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781645851] [2021-06-05 22:34:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:10,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:10,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781645851] [2021-06-05 22:34:10,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781645851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:10,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705913705] [2021-06-05 22:34:10,636 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 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 [2021-06-05 22:34:10,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:10,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:10,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:10,804 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 [2021-06-05 22:34:10,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:10,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:34:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:11,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705913705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:11,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:11,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:34:11,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495006925] [2021-06-05 22:34:11,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:34:11,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:11,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:34:11,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:34:11,039 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) [2021-06-05 22:34:11,170 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-05 22:34:11,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-06-05 22:34:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:13,079 INFO L93 Difference]: Finished difference Result 8183 states and 35550 transitions. [2021-06-05 22:34:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:34:13,080 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 [2021-06-05 22:34:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:13,098 INFO L225 Difference]: With dead ends: 8183 [2021-06-05 22:34:13,098 INFO L226 Difference]: Without dead ends: 8132 [2021-06-05 22:34:13,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1673.3ms TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:34:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-05 22:34:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 7394. [2021-06-05 22:34:13,199 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) [2021-06-05 22:34:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 32382 transitions. [2021-06-05 22:34:13,218 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 32382 transitions. Word has length 33 [2021-06-05 22:34:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:13,218 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 32382 transitions. [2021-06-05 22:34:13,218 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) [2021-06-05 22:34:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 32382 transitions. [2021-06-05 22:34:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:13,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:13,230 INFO L554 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] [2021-06-05 22:34:13,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 22:34:13,431 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:13,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1075897198, now seen corresponding path program 88 times [2021-06-05 22:34:13,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:13,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861934789] [2021-06-05 22:34:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:13,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861934789] [2021-06-05 22:34:13,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861934789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934805484] [2021-06-05 22:34:13,674 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 [2021-06-05 22:34:13,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:13,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:13,857 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 [2021-06-05 22:34:13,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:13,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:13,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:13,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:34:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:13,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934805484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:13,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:13,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:13,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382835822] [2021-06-05 22:34:13,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:13,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:13,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:13,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:13,940 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) [2021-06-05 22:34:14,704 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:34:16,322 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 22:34:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:17,507 INFO L93 Difference]: Finished difference Result 9547 states and 40304 transitions. [2021-06-05 22:34:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:34:17,507 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 [2021-06-05 22:34:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:17,528 INFO L225 Difference]: With dead ends: 9547 [2021-06-05 22:34:17,528 INFO L226 Difference]: Without dead ends: 9485 [2021-06-05 22:34:17,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 2938.5ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:34:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9485 states. [2021-06-05 22:34:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9485 to 7485. [2021-06-05 22:34:17,650 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) [2021-06-05 22:34:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7485 states to 7485 states and 32804 transitions. [2021-06-05 22:34:17,669 INFO L78 Accepts]: Start accepts. Automaton has 7485 states and 32804 transitions. Word has length 33 [2021-06-05 22:34:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:17,669 INFO L482 AbstractCegarLoop]: Abstraction has 7485 states and 32804 transitions. [2021-06-05 22:34:17,669 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) [2021-06-05 22:34:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 7485 states and 32804 transitions. [2021-06-05 22:34:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:17,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:17,681 INFO L554 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] [2021-06-05 22:34:17,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:17,885 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:17,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2039513016, now seen corresponding path program 89 times [2021-06-05 22:34:17,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:17,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528112155] [2021-06-05 22:34:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:18,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:18,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528112155] [2021-06-05 22:34:18,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528112155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:18,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524012416] [2021-06-05 22:34:18,040 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 [2021-06-05 22:34:18,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:18,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:18,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:18,220 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 [2021-06-05 22:34:18,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:18,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:18,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:18,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:34:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:18,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524012416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:18,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:18,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:18,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995072062] [2021-06-05 22:34:18,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:18,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:18,295 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) [2021-06-05 22:34:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:19,186 INFO L93 Difference]: Finished difference Result 8568 states and 36781 transitions. [2021-06-05 22:34:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:34:19,186 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 [2021-06-05 22:34:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:19,205 INFO L225 Difference]: With dead ends: 8568 [2021-06-05 22:34:19,206 INFO L226 Difference]: Without dead ends: 8456 [2021-06-05 22:34:19,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:34:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8456 states. [2021-06-05 22:34:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8456 to 7415. [2021-06-05 22:34:19,316 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) [2021-06-05 22:34:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 32539 transitions. [2021-06-05 22:34:19,335 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 32539 transitions. Word has length 33 [2021-06-05 22:34:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:19,335 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 32539 transitions. [2021-06-05 22:34:19,335 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) [2021-06-05 22:34:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 32539 transitions. [2021-06-05 22:34:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:19,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:19,347 INFO L554 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] [2021-06-05 22:34:19,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 22:34:19,548 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:19,548 INFO L82 PathProgramCache]: Analyzing trace with hash 444102738, now seen corresponding path program 90 times [2021-06-05 22:34:19,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:19,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966687609] [2021-06-05 22:34:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:19,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:19,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966687609] [2021-06-05 22:34:19,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966687609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:19,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714074783] [2021-06-05 22:34:19,828 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 [2021-06-05 22:34:19,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:34:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:34:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:20,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:20,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:20,015 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 [2021-06-05 22:34:20,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:20,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:20,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:20,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 22:34:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:20,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714074783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:20,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:20,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:34:20,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645552204] [2021-06-05 22:34:20,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:34:20,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:20,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:34:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:34:20,229 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) [2021-06-05 22:34:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:22,820 INFO L93 Difference]: Finished difference Result 8905 states and 37420 transitions. [2021-06-05 22:34:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:34:22,821 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 [2021-06-05 22:34:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:22,843 INFO L225 Difference]: With dead ends: 8905 [2021-06-05 22:34:22,843 INFO L226 Difference]: Without dead ends: 8876 [2021-06-05 22:34:22,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2107.2ms TimeCoverageRelationStatistics Valid=349, Invalid=3311, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:34:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8876 states. [2021-06-05 22:34:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8876 to 7415. [2021-06-05 22:34:22,954 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) [2021-06-05 22:34:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 32536 transitions. [2021-06-05 22:34:22,973 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 32536 transitions. Word has length 33 [2021-06-05 22:34:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:22,973 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 32536 transitions. [2021-06-05 22:34:22,974 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) [2021-06-05 22:34:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 32536 transitions. [2021-06-05 22:34:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:22,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:22,985 INFO L554 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] [2021-06-05 22:34:23,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 22:34:23,186 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash -97878318, now seen corresponding path program 91 times [2021-06-05 22:34:23,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:23,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957740691] [2021-06-05 22:34:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:23,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957740691] [2021-06-05 22:34:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957740691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039408847] [2021-06-05 22:34:23,409 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 [2021-06-05 22:34:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:23,574 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 [2021-06-05 22:34:23,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:23,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:23,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:23,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:34:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:23,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039408847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:23,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:23,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878975686] [2021-06-05 22:34:23,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:23,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:23,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:23,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:23,743 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) [2021-06-05 22:34:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:25,768 INFO L93 Difference]: Finished difference Result 8441 states and 36452 transitions. [2021-06-05 22:34:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:34:25,769 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 [2021-06-05 22:34:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:25,787 INFO L225 Difference]: With dead ends: 8441 [2021-06-05 22:34:25,787 INFO L226 Difference]: Without dead ends: 8408 [2021-06-05 22:34:25,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1647.5ms TimeCoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:34:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8408 states. [2021-06-05 22:34:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8408 to 7514. [2021-06-05 22:34:25,892 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) [2021-06-05 22:34:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 32960 transitions. [2021-06-05 22:34:25,911 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 32960 transitions. Word has length 33 [2021-06-05 22:34:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:25,911 INFO L482 AbstractCegarLoop]: Abstraction has 7514 states and 32960 transitions. [2021-06-05 22:34:25,912 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) [2021-06-05 22:34:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 32960 transitions. [2021-06-05 22:34:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:25,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:25,923 INFO L554 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] [2021-06-05 22:34:26,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:26,124 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1766271760, now seen corresponding path program 92 times [2021-06-05 22:34:26,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:26,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449073296] [2021-06-05 22:34:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:26,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:26,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449073296] [2021-06-05 22:34:26,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449073296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:26,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242036579] [2021-06-05 22:34:26,342 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 [2021-06-05 22:34:26,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:26,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:34:26,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:26,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:26,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:26,545 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 [2021-06-05 22:34:26,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:26,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-05 22:34:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:26,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242036579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:26,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:26,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:34:26,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598213873] [2021-06-05 22:34:26,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:26,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:26,725 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) [2021-06-05 22:34:29,361 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:34:29,597 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 22:34:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:29,913 INFO L93 Difference]: Finished difference Result 9252 states and 38729 transitions. [2021-06-05 22:34:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:34:29,913 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 [2021-06-05 22:34:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:29,933 INFO L225 Difference]: With dead ends: 9252 [2021-06-05 22:34:29,933 INFO L226 Difference]: Without dead ends: 9154 [2021-06-05 22:34:29,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2611.3ms TimeCoverageRelationStatistics Valid=466, Invalid=3074, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:34:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9154 states. [2021-06-05 22:34:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9154 to 7455. [2021-06-05 22:34:30,043 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) [2021-06-05 22:34:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 32730 transitions. [2021-06-05 22:34:30,062 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 32730 transitions. Word has length 33 [2021-06-05 22:34:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:30,063 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 32730 transitions. [2021-06-05 22:34:30,063 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) [2021-06-05 22:34:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 32730 transitions. [2021-06-05 22:34:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:30,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:30,075 INFO L554 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] [2021-06-05 22:34:30,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:30,275 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1122504662, now seen corresponding path program 93 times [2021-06-05 22:34:30,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:30,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670997187] [2021-06-05 22:34:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:30,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:30,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670997187] [2021-06-05 22:34:30,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670997187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:30,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553652402] [2021-06-05 22:34:30,515 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 [2021-06-05 22:34:30,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:30,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:30,685 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 [2021-06-05 22:34:30,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:30,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:30,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:30,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:34:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:30,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553652402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:30,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:30,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:34:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522429580] [2021-06-05 22:34:30,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:34:30,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:30,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:34:30,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:34:30,939 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) [2021-06-05 22:34:31,080 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 22:34:31,242 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-06-05 22:34:32,521 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 22:34:32,711 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 22:34:34,759 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 22:34:35,055 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 22:34:35,185 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 22:34:35,333 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 22:34:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:35,583 INFO L93 Difference]: Finished difference Result 9227 states and 39360 transitions. [2021-06-05 22:34:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:34:35,584 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 [2021-06-05 22:34:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:35,605 INFO L225 Difference]: With dead ends: 9227 [2021-06-05 22:34:35,605 INFO L226 Difference]: Without dead ends: 9181 [2021-06-05 22:34:35,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 3895.5ms TimeCoverageRelationStatistics Valid=670, Invalid=4880, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:34:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2021-06-05 22:34:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 7547. [2021-06-05 22:34:35,724 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) [2021-06-05 22:34:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7547 states to 7547 states and 33183 transitions. [2021-06-05 22:34:35,743 INFO L78 Accepts]: Start accepts. Automaton has 7547 states and 33183 transitions. Word has length 33 [2021-06-05 22:34:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:35,744 INFO L482 AbstractCegarLoop]: Abstraction has 7547 states and 33183 transitions. [2021-06-05 22:34:35,744 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) [2021-06-05 22:34:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7547 states and 33183 transitions. [2021-06-05 22:34:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:35,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:35,756 INFO L554 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] [2021-06-05 22:34:35,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:35,956 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:35,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1311346228, now seen corresponding path program 94 times [2021-06-05 22:34:35,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:35,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737253893] [2021-06-05 22:34:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:36,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:36,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737253893] [2021-06-05 22:34:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737253893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506406238] [2021-06-05 22:34:36,188 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 [2021-06-05 22:34:36,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:36,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:36,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:36,359 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 [2021-06-05 22:34:36,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:36,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:36,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:36,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:34:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:36,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506406238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:36,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:36,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:36,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796384038] [2021-06-05 22:34:36,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:36,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:36,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:36,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:36,463 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) [2021-06-05 22:34:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:38,561 INFO L93 Difference]: Finished difference Result 8624 states and 37117 transitions. [2021-06-05 22:34:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:34:38,561 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 [2021-06-05 22:34:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:38,580 INFO L225 Difference]: With dead ends: 8624 [2021-06-05 22:34:38,580 INFO L226 Difference]: Without dead ends: 8596 [2021-06-05 22:34:38,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1722.5ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:34:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2021-06-05 22:34:38,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 7513. [2021-06-05 22:34:38,697 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) [2021-06-05 22:34:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 32974 transitions. [2021-06-05 22:34:38,719 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 32974 transitions. Word has length 33 [2021-06-05 22:34:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:38,719 INFO L482 AbstractCegarLoop]: Abstraction has 7513 states and 32974 transitions. [2021-06-05 22:34:38,719 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) [2021-06-05 22:34:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 32974 transitions. [2021-06-05 22:34:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:38,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:38,731 INFO L554 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] [2021-06-05 22:34:38,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 22:34:38,932 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1315227626, now seen corresponding path program 95 times [2021-06-05 22:34:38,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:38,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191110714] [2021-06-05 22:34:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:39,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:39,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191110714] [2021-06-05 22:34:39,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191110714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475825134] [2021-06-05 22:34:39,162 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 [2021-06-05 22:34:39,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:34:39,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:39,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:34:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:39,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:39,328 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 27 treesize of output 13 [2021-06-05 22:34:39,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:39,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:39,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:39,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:23 [2021-06-05 22:34:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:39,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475825134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:39,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:34:39,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931977950] [2021-06-05 22:34:39,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:39,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:39,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:39,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:39,453 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) [2021-06-05 22:34:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:41,895 INFO L93 Difference]: Finished difference Result 9456 states and 39560 transitions. [2021-06-05 22:34:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:34:41,896 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 [2021-06-05 22:34:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:41,915 INFO L225 Difference]: With dead ends: 9456 [2021-06-05 22:34:41,915 INFO L226 Difference]: Without dead ends: 9308 [2021-06-05 22:34:41,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1975.0ms TimeCoverageRelationStatistics Valid=518, Invalid=3142, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:34:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9308 states. [2021-06-05 22:34:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9308 to 7526. [2021-06-05 22:34:42,027 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) [2021-06-05 22:34:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7526 states to 7526 states and 33085 transitions. [2021-06-05 22:34:42,046 INFO L78 Accepts]: Start accepts. Automaton has 7526 states and 33085 transitions. Word has length 33 [2021-06-05 22:34:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:42,046 INFO L482 AbstractCegarLoop]: Abstraction has 7526 states and 33085 transitions. [2021-06-05 22:34:42,047 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) [2021-06-05 22:34:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7526 states and 33085 transitions. [2021-06-05 22:34:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:42,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:42,059 INFO L554 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] [2021-06-05 22:34:42,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 22:34:42,259 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:42,259 INFO L82 PathProgramCache]: Analyzing trace with hash -728202550, now seen corresponding path program 96 times [2021-06-05 22:34:42,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:42,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932203079] [2021-06-05 22:34:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:42,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:42,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932203079] [2021-06-05 22:34:42,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932203079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:42,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730128465] [2021-06-05 22:34:42,484 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 [2021-06-05 22:34:42,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:42,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:42,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:42,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:42,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:42,723 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:34:42,723 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 [2021-06-05 22:34:42,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:34:42,773 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-05 22:34:42,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:42,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:34:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:42,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730128465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:42,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:42,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:34:42,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480285188] [2021-06-05 22:34:42,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:34:42,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:42,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:34:42,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:42,946 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) [2021-06-05 22:34:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:45,953 INFO L93 Difference]: Finished difference Result 8776 states and 37721 transitions. [2021-06-05 22:34:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:34:45,954 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 [2021-06-05 22:34:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:45,972 INFO L225 Difference]: With dead ends: 8776 [2021-06-05 22:34:45,973 INFO L226 Difference]: Without dead ends: 8730 [2021-06-05 22:34:45,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 2384.8ms TimeCoverageRelationStatistics Valid=479, Invalid=3553, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:34:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8730 states. [2021-06-05 22:34:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8730 to 7677. [2021-06-05 22:34:46,087 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) [2021-06-05 22:34:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 33806 transitions. [2021-06-05 22:34:46,107 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 33806 transitions. Word has length 33 [2021-06-05 22:34:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:46,107 INFO L482 AbstractCegarLoop]: Abstraction has 7677 states and 33806 transitions. [2021-06-05 22:34:46,107 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) [2021-06-05 22:34:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 33806 transitions. [2021-06-05 22:34:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:46,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:46,119 INFO L554 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] [2021-06-05 22:34:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 22:34:46,319 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -917044116, now seen corresponding path program 97 times [2021-06-05 22:34:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389051381] [2021-06-05 22:34:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:46,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:46,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389051381] [2021-06-05 22:34:46,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389051381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:46,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022718139] [2021-06-05 22:34:46,543 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 [2021-06-05 22:34:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:46,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:46,760 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 [2021-06-05 22:34:46,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:46,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:46,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:46,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:34:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:46,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022718139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:46,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:46,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:46,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133115513] [2021-06-05 22:34:46,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:46,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:46,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:46,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:46,845 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) [2021-06-05 22:34:47,464 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:34:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:49,472 INFO L93 Difference]: Finished difference Result 9373 states and 40015 transitions. [2021-06-05 22:34:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:34:49,472 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 [2021-06-05 22:34:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:49,493 INFO L225 Difference]: With dead ends: 9373 [2021-06-05 22:34:49,493 INFO L226 Difference]: Without dead ends: 9346 [2021-06-05 22:34:49,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2142.6ms TimeCoverageRelationStatistics Valid=584, Invalid=3706, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:34:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9346 states. [2021-06-05 22:34:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9346 to 7657. [2021-06-05 22:34:49,614 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) [2021-06-05 22:34:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 33675 transitions. [2021-06-05 22:34:49,635 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 33675 transitions. Word has length 33 [2021-06-05 22:34:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:49,635 INFO L482 AbstractCegarLoop]: Abstraction has 7657 states and 33675 transitions. [2021-06-05 22:34:49,635 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) [2021-06-05 22:34:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 33675 transitions. [2021-06-05 22:34:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:49,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:49,647 INFO L554 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] [2021-06-05 22:34:49,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:49,853 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1709529738, now seen corresponding path program 98 times [2021-06-05 22:34:49,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:49,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034920976] [2021-06-05 22:34:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:50,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:50,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034920976] [2021-06-05 22:34:50,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034920976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:50,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781209536] [2021-06-05 22:34:50,085 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 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 [2021-06-05 22:34:50,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:34:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:50,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:50,290 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 [2021-06-05 22:34:50,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:50,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:50,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:50,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 22:34:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:50,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781209536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:50,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:50,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:34:50,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137205243] [2021-06-05 22:34:50,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:50,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:50,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:50,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:50,429 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) [2021-06-05 22:34:51,110 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 22:34:52,178 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 22:34:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:54,380 INFO L93 Difference]: Finished difference Result 10038 states and 41890 transitions. [2021-06-05 22:34:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:34:54,380 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 [2021-06-05 22:34:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:54,401 INFO L225 Difference]: With dead ends: 10038 [2021-06-05 22:34:54,401 INFO L226 Difference]: Without dead ends: 9959 [2021-06-05 22:34:54,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 3322.2ms TimeCoverageRelationStatistics Valid=711, Invalid=4691, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:34:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9959 states. [2021-06-05 22:34:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9959 to 7617. [2021-06-05 22:34:54,517 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) [2021-06-05 22:34:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7617 states to 7617 states and 33506 transitions. [2021-06-05 22:34:54,537 INFO L78 Accepts]: Start accepts. Automaton has 7617 states and 33506 transitions. Word has length 33 [2021-06-05 22:34:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:54,537 INFO L482 AbstractCegarLoop]: Abstraction has 7617 states and 33506 transitions. [2021-06-05 22:34:54,537 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) [2021-06-05 22:34:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 7617 states and 33506 transitions. [2021-06-05 22:34:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:54,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:54,549 INFO L554 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] [2021-06-05 22:34:54,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:54,750 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1229159046, now seen corresponding path program 99 times [2021-06-05 22:34:54,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:54,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888807652] [2021-06-05 22:34:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:54,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888807652] [2021-06-05 22:34:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888807652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79456640] [2021-06-05 22:34:54,917 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 [2021-06-05 22:34:54,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:54,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:54,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:54,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:55,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:55,134 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 [2021-06-05 22:34:55,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:55,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:55,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:55,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 22:34:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:55,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79456640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:55,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:55,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:34:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661842003] [2021-06-05 22:34:55,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:34:55,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:34:55,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:34:55,343 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) [2021-06-05 22:34:55,483 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 22:34:56,091 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 22:34:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:57,396 INFO L93 Difference]: Finished difference Result 8344 states and 36330 transitions. [2021-06-05 22:34:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:34:57,396 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 [2021-06-05 22:34:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:57,415 INFO L225 Difference]: With dead ends: 8344 [2021-06-05 22:34:57,415 INFO L226 Difference]: Without dead ends: 8313 [2021-06-05 22:34:57,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1626.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:34:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8313 states. [2021-06-05 22:34:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8313 to 7627. [2021-06-05 22:34:57,567 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) [2021-06-05 22:34:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 33524 transitions. [2021-06-05 22:34:57,587 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 33524 transitions. Word has length 33 [2021-06-05 22:34:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:57,587 INFO L482 AbstractCegarLoop]: Abstraction has 7627 states and 33524 transitions. [2021-06-05 22:34:57,587 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) [2021-06-05 22:34:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 33524 transitions. [2021-06-05 22:34:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:57,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:57,600 INFO L554 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] [2021-06-05 22:34:57,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:57,800 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash 527883916, now seen corresponding path program 100 times [2021-06-05 22:34:57,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:57,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740508323] [2021-06-05 22:34:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:57,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:57,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740508323] [2021-06-05 22:34:57,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740508323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:57,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458392474] [2021-06-05 22:34:57,967 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 [2021-06-05 22:34:58,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:58,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:34:58,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:58,154 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 [2021-06-05 22:34:58,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:58,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:34:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:58,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458392474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:58,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:58,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:34:58,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801449308] [2021-06-05 22:34:58,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:58,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:58,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:58,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:58,230 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) [2021-06-05 22:34:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:59,458 INFO L93 Difference]: Finished difference Result 8603 states and 37244 transitions. [2021-06-05 22:34:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:34:59,458 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 [2021-06-05 22:34:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:59,477 INFO L225 Difference]: With dead ends: 8603 [2021-06-05 22:34:59,477 INFO L226 Difference]: Without dead ends: 8524 [2021-06-05 22:34:59,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 978.6ms TimeCoverageRelationStatistics Valid=314, Invalid=1942, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:34:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8524 states. [2021-06-05 22:34:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8524 to 7607. [2021-06-05 22:34:59,589 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) [2021-06-05 22:34:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 33486 transitions. [2021-06-05 22:34:59,609 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 33486 transitions. Word has length 33 [2021-06-05 22:34:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:59,609 INFO L482 AbstractCegarLoop]: Abstraction has 7607 states and 33486 transitions. [2021-06-05 22:34:59,609 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) [2021-06-05 22:34:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 33486 transitions. [2021-06-05 22:34:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:34:59,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:59,622 INFO L554 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] [2021-06-05 22:34:59,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 22:34:59,822 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash 808042602, now seen corresponding path program 101 times [2021-06-05 22:34:59,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:59,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753810456] [2021-06-05 22:34:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:00,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:00,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753810456] [2021-06-05 22:35:00,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753810456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:00,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697516453] [2021-06-05 22:35:00,073 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 [2021-06-05 22:35:00,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:00,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:35:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:00,264 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 [2021-06-05 22:35:00,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:00,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:00,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:00,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 22:35:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:00,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697516453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:00,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:00,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:35:00,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211497067] [2021-06-05 22:35:00,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:35:00,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:35:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:00,372 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) [2021-06-05 22:35:00,928 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 22:35:01,231 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:35:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:03,892 INFO L93 Difference]: Finished difference Result 9224 states and 39739 transitions. [2021-06-05 22:35:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:35:03,893 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 [2021-06-05 22:35:03,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:03,914 INFO L225 Difference]: With dead ends: 9224 [2021-06-05 22:35:03,914 INFO L226 Difference]: Without dead ends: 9192 [2021-06-05 22:35:03,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 2924.8ms TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:35:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9192 states. [2021-06-05 22:35:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9192 to 7666. [2021-06-05 22:35:04,041 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) [2021-06-05 22:35:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 33725 transitions. [2021-06-05 22:35:04,063 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 33725 transitions. Word has length 33 [2021-06-05 22:35:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:04,063 INFO L482 AbstractCegarLoop]: Abstraction has 7666 states and 33725 transitions. [2021-06-05 22:35:04,063 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) [2021-06-05 22:35:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 33725 transitions. [2021-06-05 22:35:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:04,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:04,076 INFO L554 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] [2021-06-05 22:35:04,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 22:35:04,277 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1049192406, now seen corresponding path program 102 times [2021-06-05 22:35:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:04,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857931460] [2021-06-05 22:35:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:04,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:04,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857931460] [2021-06-05 22:35:04,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857931460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:04,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056068038] [2021-06-05 22:35:04,496 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 [2021-06-05 22:35:04,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:04,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:04,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:04,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:04,736 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:04,736 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 [2021-06-05 22:35:04,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:04,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:04,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:04,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:35:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056068038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:04,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:04,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:35:04,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777446361] [2021-06-05 22:35:04,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:35:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:35:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:04,877 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) [2021-06-05 22:35:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:07,757 INFO L93 Difference]: Finished difference Result 9511 states and 39699 transitions. [2021-06-05 22:35:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:35:07,757 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 [2021-06-05 22:35:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:07,777 INFO L225 Difference]: With dead ends: 9511 [2021-06-05 22:35:07,778 INFO L226 Difference]: Without dead ends: 9493 [2021-06-05 22:35:07,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2432.9ms TimeCoverageRelationStatistics Valid=467, Invalid=3193, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:35:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9493 states. [2021-06-05 22:35:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9493 to 7657. [2021-06-05 22:35:07,907 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) [2021-06-05 22:35:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 33691 transitions. [2021-06-05 22:35:07,929 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 33691 transitions. Word has length 33 [2021-06-05 22:35:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:07,929 INFO L482 AbstractCegarLoop]: Abstraction has 7657 states and 33691 transitions. [2021-06-05 22:35:07,929 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) [2021-06-05 22:35:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 33691 transitions. [2021-06-05 22:35:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:07,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:07,942 INFO L554 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] [2021-06-05 22:35:08,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:08,143 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1987599684, now seen corresponding path program 103 times [2021-06-05 22:35:08,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:08,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062359260] [2021-06-05 22:35:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:08,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:08,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062359260] [2021-06-05 22:35:08,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062359260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:08,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654480517] [2021-06-05 22:35:08,312 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 [2021-06-05 22:35:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:08,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:08,534 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 [2021-06-05 22:35:08,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:08,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:08,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:08,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:35:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:08,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654480517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:08,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:08,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:35:08,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564674264] [2021-06-05 22:35:08,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:08,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:08,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:08,613 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) [2021-06-05 22:35:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:09,952 INFO L93 Difference]: Finished difference Result 8400 states and 36547 transitions. [2021-06-05 22:35:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:35:09,952 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 [2021-06-05 22:35:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:09,978 INFO L225 Difference]: With dead ends: 8400 [2021-06-05 22:35:09,978 INFO L226 Difference]: Without dead ends: 8308 [2021-06-05 22:35:09,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 984.8ms TimeCoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:35:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8308 states. [2021-06-05 22:35:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8308 to 7568. [2021-06-05 22:35:10,139 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) [2021-06-05 22:35:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7568 states to 7568 states and 33300 transitions. [2021-06-05 22:35:10,160 INFO L78 Accepts]: Start accepts. Automaton has 7568 states and 33300 transitions. Word has length 33 [2021-06-05 22:35:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:10,160 INFO L482 AbstractCegarLoop]: Abstraction has 7568 states and 33300 transitions. [2021-06-05 22:35:10,160 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) [2021-06-05 22:35:10,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7568 states and 33300 transitions. [2021-06-05 22:35:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:10,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:10,173 INFO L554 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] [2021-06-05 22:35:10,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:10,374 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1342179098, now seen corresponding path program 104 times [2021-06-05 22:35:10,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:10,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192245889] [2021-06-05 22:35:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:10,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:10,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192245889] [2021-06-05 22:35:10,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192245889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:10,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471539556] [2021-06-05 22:35:10,550 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 [2021-06-05 22:35:10,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:10,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:10,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:10,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:10,817 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 [2021-06-05 22:35:10,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:10,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:10,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:10,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:35:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:10,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471539556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:10,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:10,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:35:10,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653544163] [2021-06-05 22:35:10,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:35:10,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:10,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:35:10,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:10,950 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) [2021-06-05 22:35:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:12,186 INFO L93 Difference]: Finished difference Result 8213 states and 35808 transitions. [2021-06-05 22:35:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:35:12,186 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 [2021-06-05 22:35:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:12,204 INFO L225 Difference]: With dead ends: 8213 [2021-06-05 22:35:12,205 INFO L226 Difference]: Without dead ends: 8167 [2021-06-05 22:35:12,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1015.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:35:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2021-06-05 22:35:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 7568. [2021-06-05 22:35:12,318 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) [2021-06-05 22:35:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7568 states to 7568 states and 33298 transitions. [2021-06-05 22:35:12,338 INFO L78 Accepts]: Start accepts. Automaton has 7568 states and 33298 transitions. Word has length 33 [2021-06-05 22:35:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:12,338 INFO L482 AbstractCegarLoop]: Abstraction has 7568 states and 33298 transitions. [2021-06-05 22:35:12,338 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) [2021-06-05 22:35:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7568 states and 33298 transitions. [2021-06-05 22:35:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:12,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:12,351 INFO L554 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] [2021-06-05 22:35:12,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:12,552 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash 875471176, now seen corresponding path program 105 times [2021-06-05 22:35:12,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:12,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690225949] [2021-06-05 22:35:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:12,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690225949] [2021-06-05 22:35:12,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690225949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843118427] [2021-06-05 22:35:12,728 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 [2021-06-05 22:35:12,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:12,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:12,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:12,960 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 [2021-06-05 22:35:12,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:12,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:12,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:12,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 22:35:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:13,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843118427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:13,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:13,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:35:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211276217] [2021-06-05 22:35:13,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:35:13,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:13,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:35:13,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:13,171 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) [2021-06-05 22:35:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:15,083 INFO L93 Difference]: Finished difference Result 8386 states and 36628 transitions. [2021-06-05 22:35:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:35:15,083 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 [2021-06-05 22:35:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:15,102 INFO L225 Difference]: With dead ends: 8386 [2021-06-05 22:35:15,102 INFO L226 Difference]: Without dead ends: 8333 [2021-06-05 22:35:15,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1484.3ms TimeCoverageRelationStatistics Valid=246, Invalid=1824, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:35:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8333 states. [2021-06-05 22:35:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8333 to 7554. [2021-06-05 22:35:15,204 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) [2021-06-05 22:35:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 33253 transitions. [2021-06-05 22:35:15,224 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 33253 transitions. Word has length 33 [2021-06-05 22:35:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:15,224 INFO L482 AbstractCegarLoop]: Abstraction has 7554 states and 33253 transitions. [2021-06-05 22:35:15,224 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) [2021-06-05 22:35:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 33253 transitions. [2021-06-05 22:35:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:15,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:15,236 INFO L554 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] [2021-06-05 22:35:15,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:15,438 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:15,438 INFO L82 PathProgramCache]: Analyzing trace with hash 793976442, now seen corresponding path program 106 times [2021-06-05 22:35:15,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:15,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784404328] [2021-06-05 22:35:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:15,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784404328] [2021-06-05 22:35:15,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784404328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426473940] [2021-06-05 22:35:15,630 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 [2021-06-05 22:35:15,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:15,880 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 28 treesize of output 12 [2021-06-05 22:35:15,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:15,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:15,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:15,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-05 22:35:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:15,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426473940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:15,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:15,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:15,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988842842] [2021-06-05 22:35:15,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:15,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:15,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:15,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:15,948 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) [2021-06-05 22:35:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:17,210 INFO L93 Difference]: Finished difference Result 7951 states and 34856 transitions. [2021-06-05 22:35:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:35:17,210 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 [2021-06-05 22:35:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:17,229 INFO L225 Difference]: With dead ends: 7951 [2021-06-05 22:35:17,229 INFO L226 Difference]: Without dead ends: 7936 [2021-06-05 22:35:17,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 934.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:35:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7936 states. [2021-06-05 22:35:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7936 to 7589. [2021-06-05 22:35:17,333 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) [2021-06-05 22:35:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 33412 transitions. [2021-06-05 22:35:17,353 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 33412 transitions. Word has length 33 [2021-06-05 22:35:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:17,353 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 33412 transitions. [2021-06-05 22:35:17,353 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) [2021-06-05 22:35:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 33412 transitions. [2021-06-05 22:35:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:17,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:17,367 INFO L554 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] [2021-06-05 22:35:17,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 22:35:17,569 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 729342936, now seen corresponding path program 107 times [2021-06-05 22:35:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:17,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75428710] [2021-06-05 22:35:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:17,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:17,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75428710] [2021-06-05 22:35:17,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75428710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:17,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737754189] [2021-06-05 22:35:17,752 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 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 [2021-06-05 22:35:17,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:35:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:35:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:18,096 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 [2021-06-05 22:35:18,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:18,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:18,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:18,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:35:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:18,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737754189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:18,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:18,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:35:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593193933] [2021-06-05 22:35:18,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:35:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:35:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:18,162 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) [2021-06-05 22:35:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:19,129 INFO L93 Difference]: Finished difference Result 7977 states and 34896 transitions. [2021-06-05 22:35:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:35:19,130 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 [2021-06-05 22:35:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:19,148 INFO L225 Difference]: With dead ends: 7977 [2021-06-05 22:35:19,148 INFO L226 Difference]: Without dead ends: 7962 [2021-06-05 22:35:19,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 823.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:35:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2021-06-05 22:35:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 7592. [2021-06-05 22:35:19,250 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) [2021-06-05 22:35:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7592 states to 7592 states and 33423 transitions. [2021-06-05 22:35:19,270 INFO L78 Accepts]: Start accepts. Automaton has 7592 states and 33423 transitions. Word has length 33 [2021-06-05 22:35:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:19,271 INFO L482 AbstractCegarLoop]: Abstraction has 7592 states and 33423 transitions. [2021-06-05 22:35:19,271 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) [2021-06-05 22:35:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7592 states and 33423 transitions. [2021-06-05 22:35:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:19,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:19,284 INFO L554 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] [2021-06-05 22:35:19,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 22:35:19,484 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1163372282, now seen corresponding path program 108 times [2021-06-05 22:35:19,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:19,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2247629] [2021-06-05 22:35:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:19,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:19,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2247629] [2021-06-05 22:35:19,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2247629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620501268] [2021-06-05 22:35:19,683 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 [2021-06-05 22:35:19,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:35:19,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:35:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:19,986 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:19,986 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 [2021-06-05 22:35:19,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:20,020 INFO L628 ElimStorePlain]: treesize reduction 82, result has 22.6 percent of original size [2021-06-05 22:35:20,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:20,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-06-05 22:35:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:20,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620501268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:20,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:20,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:35:20,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496354875] [2021-06-05 22:35:20,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:35:20,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:35:20,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:35:20,203 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) [2021-06-05 22:35:21,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:21,630 INFO L93 Difference]: Finished difference Result 7908 states and 34625 transitions. [2021-06-05 22:35:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:35:21,631 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 [2021-06-05 22:35:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:21,649 INFO L225 Difference]: With dead ends: 7908 [2021-06-05 22:35:21,649 INFO L226 Difference]: Without dead ends: 7893 [2021-06-05 22:35:21,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1227.6ms TimeCoverageRelationStatistics Valid=182, Invalid=1980, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:35:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7893 states. [2021-06-05 22:35:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7893 to 7592. [2021-06-05 22:35:21,805 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) [2021-06-05 22:35:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7592 states to 7592 states and 33423 transitions. [2021-06-05 22:35:21,825 INFO L78 Accepts]: Start accepts. Automaton has 7592 states and 33423 transitions. Word has length 33 [2021-06-05 22:35:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:21,825 INFO L482 AbstractCegarLoop]: Abstraction has 7592 states and 33423 transitions. [2021-06-05 22:35:21,825 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) [2021-06-05 22:35:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7592 states and 33423 transitions. [2021-06-05 22:35:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:21,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:21,838 INFO L554 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] [2021-06-05 22:35:22,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 22:35:22,038 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:22,039 INFO L82 PathProgramCache]: Analyzing trace with hash 810232792, now seen corresponding path program 109 times [2021-06-05 22:35:22,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:22,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628002899] [2021-06-05 22:35:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:22,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:22,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628002899] [2021-06-05 22:35:22,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628002899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:22,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242406634] [2021-06-05 22:35:22,229 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 [2021-06-05 22:35:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:22,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:35:22,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:22,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:22,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:22,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:35:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:22,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242406634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:22,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:22,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:22,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611617875] [2021-06-05 22:35:22,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:22,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:22,527 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) [2021-06-05 22:35:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:23,870 INFO L93 Difference]: Finished difference Result 8679 states and 37740 transitions. [2021-06-05 22:35:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:35:23,870 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 [2021-06-05 22:35:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:23,890 INFO L225 Difference]: With dead ends: 8679 [2021-06-05 22:35:23,891 INFO L226 Difference]: Without dead ends: 8664 [2021-06-05 22:35:23,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1050.3ms TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:35:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2021-06-05 22:35:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 7696. [2021-06-05 22:35:24,018 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) [2021-06-05 22:35:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7696 states to 7696 states and 33900 transitions. [2021-06-05 22:35:24,039 INFO L78 Accepts]: Start accepts. Automaton has 7696 states and 33900 transitions. Word has length 33 [2021-06-05 22:35:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:24,039 INFO L482 AbstractCegarLoop]: Abstraction has 7696 states and 33900 transitions. [2021-06-05 22:35:24,039 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) [2021-06-05 22:35:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7696 states and 33900 transitions. [2021-06-05 22:35:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:24,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:24,052 INFO L554 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] [2021-06-05 22:35:24,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:24,253 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1047002216, now seen corresponding path program 110 times [2021-06-05 22:35:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:24,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851563196] [2021-06-05 22:35:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:24,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851563196] [2021-06-05 22:35:24,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851563196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966445321] [2021-06-05 22:35:24,434 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 [2021-06-05 22:35:24,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:24,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:24,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:35:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:24,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:24,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:24,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 22:35:24,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:24,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:24,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:24,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-05 22:35:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:24,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966445321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:24,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:24,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:35:24,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438366435] [2021-06-05 22:35:24,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:35:24,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:24,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:35:24,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:24,853 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) [2021-06-05 22:35:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:25,526 INFO L93 Difference]: Finished difference Result 8113 states and 35526 transitions. [2021-06-05 22:35:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:35:25,526 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 [2021-06-05 22:35:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:25,545 INFO L225 Difference]: With dead ends: 8113 [2021-06-05 22:35:25,545 INFO L226 Difference]: Without dead ends: 8099 [2021-06-05 22:35:25,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 708.0ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2021-06-05 22:35:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 7688. [2021-06-05 22:35:25,693 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) [2021-06-05 22:35:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 33873 transitions. [2021-06-05 22:35:25,713 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 33873 transitions. Word has length 33 [2021-06-05 22:35:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:25,713 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 33873 transitions. [2021-06-05 22:35:25,713 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) [2021-06-05 22:35:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 33873 transitions. [2021-06-05 22:35:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:25,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:25,725 INFO L554 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] [2021-06-05 22:35:25,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:25,926 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:25,926 INFO L82 PathProgramCache]: Analyzing trace with hash -746274642, now seen corresponding path program 111 times [2021-06-05 22:35:25,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:25,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771025419] [2021-06-05 22:35:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:26,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:26,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771025419] [2021-06-05 22:35:26,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771025419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:26,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388168961] [2021-06-05 22:35:26,108 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 [2021-06-05 22:35:26,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:35:26,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:26,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:26,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:26,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:26,398 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 [2021-06-05 22:35:26,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:26,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:26,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:26,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:35:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:26,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388168961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:26,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:26,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:35:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553396888] [2021-06-05 22:35:26,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:35:26,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:26,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:35:26,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:26,580 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) [2021-06-05 22:35:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:27,320 INFO L93 Difference]: Finished difference Result 8096 states and 35418 transitions. [2021-06-05 22:35:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:35:27,320 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 [2021-06-05 22:35:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:27,339 INFO L225 Difference]: With dead ends: 8096 [2021-06-05 22:35:27,339 INFO L226 Difference]: Without dead ends: 8081 [2021-06-05 22:35:27,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 693.4ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2021-06-05 22:35:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 7688. [2021-06-05 22:35:27,446 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) [2021-06-05 22:35:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 33873 transitions. [2021-06-05 22:35:27,466 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 33873 transitions. Word has length 33 [2021-06-05 22:35:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:27,466 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 33873 transitions. [2021-06-05 22:35:27,466 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) [2021-06-05 22:35:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 33873 transitions. [2021-06-05 22:35:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:27,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:27,478 INFO L554 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] [2021-06-05 22:35:27,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 22:35:27,679 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash -312245296, now seen corresponding path program 112 times [2021-06-05 22:35:27,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:27,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991250373] [2021-06-05 22:35:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:27,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991250373] [2021-06-05 22:35:27,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991250373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280876731] [2021-06-05 22:35:27,866 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 [2021-06-05 22:35:27,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:27,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:27,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:27,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:28,076 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 [2021-06-05 22:35:28,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:28,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:28,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:28,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:35:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:28,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280876731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:28,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:28,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:28,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519788607] [2021-06-05 22:35:28,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:28,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:28,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:28,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:28,164 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) [2021-06-05 22:35:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:29,896 INFO L93 Difference]: Finished difference Result 8317 states and 36345 transitions. [2021-06-05 22:35:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:35:29,896 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 [2021-06-05 22:35:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:29,917 INFO L225 Difference]: With dead ends: 8317 [2021-06-05 22:35:29,917 INFO L226 Difference]: Without dead ends: 8302 [2021-06-05 22:35:29,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1341.6ms TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:35:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2021-06-05 22:35:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 7688. [2021-06-05 22:35:30,022 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) [2021-06-05 22:35:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 33873 transitions. [2021-06-05 22:35:30,042 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 33873 transitions. Word has length 33 [2021-06-05 22:35:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:30,043 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 33873 transitions. [2021-06-05 22:35:30,043 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) [2021-06-05 22:35:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 33873 transitions. [2021-06-05 22:35:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:30,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:30,055 INFO L554 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] [2021-06-05 22:35:30,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 22:35:30,256 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1772347502, now seen corresponding path program 113 times [2021-06-05 22:35:30,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:30,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5919704] [2021-06-05 22:35:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:30,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:30,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5919704] [2021-06-05 22:35:30,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5919704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:30,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101492784] [2021-06-05 22:35:30,436 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 [2021-06-05 22:35:30,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:35:30,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:30,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:35:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:30,668 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 [2021-06-05 22:35:30,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:30,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:30,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:30,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:35:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:30,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101492784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:30,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:30,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:35:30,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520718988] [2021-06-05 22:35:30,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:30,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:30,743 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) [2021-06-05 22:35:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:31,774 INFO L93 Difference]: Finished difference Result 8366 states and 36490 transitions. [2021-06-05 22:35:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:35:31,774 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 [2021-06-05 22:35:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:31,793 INFO L225 Difference]: With dead ends: 8366 [2021-06-05 22:35:31,793 INFO L226 Difference]: Without dead ends: 8331 [2021-06-05 22:35:31,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 893.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:35:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8331 states. [2021-06-05 22:35:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 7608. [2021-06-05 22:35:31,901 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) [2021-06-05 22:35:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 33549 transitions. [2021-06-05 22:35:31,921 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 33549 transitions. Word has length 33 [2021-06-05 22:35:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:31,921 INFO L482 AbstractCegarLoop]: Abstraction has 7608 states and 33549 transitions. [2021-06-05 22:35:31,921 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) [2021-06-05 22:35:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 33549 transitions. [2021-06-05 22:35:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:31,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:31,933 INFO L554 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] [2021-06-05 22:35:32,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 22:35:32,133 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:32,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1477181358, now seen corresponding path program 114 times [2021-06-05 22:35:32,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:32,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709650279] [2021-06-05 22:35:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:32,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:32,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709650279] [2021-06-05 22:35:32,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709650279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:32,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785856742] [2021-06-05 22:35:32,315 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 [2021-06-05 22:35:32,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:35:32,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:32,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:35:32,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:32,636 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:32,637 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 [2021-06-05 22:35:32,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:32,678 INFO L628 ElimStorePlain]: treesize reduction 75, result has 21.1 percent of original size [2021-06-05 22:35:32,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:35:32,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-06-05 22:35:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:32,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785856742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:32,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:32,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:35:32,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162259077] [2021-06-05 22:35:32,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:32,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:32,717 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) [2021-06-05 22:35:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:34,327 INFO L93 Difference]: Finished difference Result 8486 states and 37127 transitions. [2021-06-05 22:35:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:35:34,328 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 [2021-06-05 22:35:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:34,347 INFO L225 Difference]: With dead ends: 8486 [2021-06-05 22:35:34,347 INFO L226 Difference]: Without dead ends: 8453 [2021-06-05 22:35:34,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1085.3ms TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:35:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-06-05 22:35:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 7703. [2021-06-05 22:35:34,454 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) [2021-06-05 22:35:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7703 states to 7703 states and 34010 transitions. [2021-06-05 22:35:34,474 INFO L78 Accepts]: Start accepts. Automaton has 7703 states and 34010 transitions. Word has length 33 [2021-06-05 22:35:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:34,474 INFO L482 AbstractCegarLoop]: Abstraction has 7703 states and 34010 transitions. [2021-06-05 22:35:34,474 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) [2021-06-05 22:35:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7703 states and 34010 transitions. [2021-06-05 22:35:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:34,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:34,487 INFO L554 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] [2021-06-05 22:35:34,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:34,689 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1043152012, now seen corresponding path program 115 times [2021-06-05 22:35:34,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:34,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660361821] [2021-06-05 22:35:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:34,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:34,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660361821] [2021-06-05 22:35:34,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660361821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:34,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994548942] [2021-06-05 22:35:34,871 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 [2021-06-05 22:35:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:35,078 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 [2021-06-05 22:35:35,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:35,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:35,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:35,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:35:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:35,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994548942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:35,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:35,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:35,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303859281] [2021-06-05 22:35:35,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:35,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:35,166 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) [2021-06-05 22:35:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:36,930 INFO L93 Difference]: Finished difference Result 8531 states and 37355 transitions. [2021-06-05 22:35:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:35:36,931 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 [2021-06-05 22:35:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:36,951 INFO L225 Difference]: With dead ends: 8531 [2021-06-05 22:35:36,951 INFO L226 Difference]: Without dead ends: 8501 [2021-06-05 22:35:36,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1236.4ms TimeCoverageRelationStatistics Valid=298, Invalid=2354, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:35:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-05 22:35:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 7724. [2021-06-05 22:35:37,066 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) [2021-06-05 22:35:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 34117 transitions. [2021-06-05 22:35:37,087 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 34117 transitions. Word has length 33 [2021-06-05 22:35:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:37,087 INFO L482 AbstractCegarLoop]: Abstraction has 7724 states and 34117 transitions. [2021-06-05 22:35:37,088 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) [2021-06-05 22:35:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 34117 transitions. [2021-06-05 22:35:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:37,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:37,101 INFO L554 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] [2021-06-05 22:35:37,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 22:35:37,305 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1396291502, now seen corresponding path program 116 times [2021-06-05 22:35:37,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:37,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703551899] [2021-06-05 22:35:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:37,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:37,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703551899] [2021-06-05 22:35:37,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703551899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:37,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843248593] [2021-06-05 22:35:37,565 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 [2021-06-05 22:35:37,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:37,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:37,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:35:37,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:37,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,816 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 [2021-06-05 22:35:37,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-05 22:35:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:38,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843248593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:38,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:38,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:35:38,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827848103] [2021-06-05 22:35:38,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:35:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:35:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:38,003 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) [2021-06-05 22:35:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:39,393 INFO L93 Difference]: Finished difference Result 8614 states and 37519 transitions. [2021-06-05 22:35:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:35:39,393 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 [2021-06-05 22:35:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:39,414 INFO L225 Difference]: With dead ends: 8614 [2021-06-05 22:35:39,414 INFO L226 Difference]: Without dead ends: 8584 [2021-06-05 22:35:39,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1089.4ms TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:35:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8584 states. [2021-06-05 22:35:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8584 to 7731. [2021-06-05 22:35:39,536 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) [2021-06-05 22:35:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 34143 transitions. [2021-06-05 22:35:39,557 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 34143 transitions. Word has length 33 [2021-06-05 22:35:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:39,557 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 34143 transitions. [2021-06-05 22:35:39,557 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) [2021-06-05 22:35:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 34143 transitions. [2021-06-05 22:35:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:39,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:39,570 INFO L554 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] [2021-06-05 22:35:39,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 22:35:39,771 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:39,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1585133068, now seen corresponding path program 117 times [2021-06-05 22:35:39,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:39,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532628740] [2021-06-05 22:35:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:39,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532628740] [2021-06-05 22:35:39,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532628740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365258037] [2021-06-05 22:35:39,954 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 [2021-06-05 22:35:39,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:35:39,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:35:39,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:40,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:40,239 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:40,240 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 [2021-06-05 22:35:40,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:40,269 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-05 22:35:40,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:40,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:35:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365258037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:40,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:35:40,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34707013] [2021-06-05 22:35:40,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:35:40,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:35:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:35:40,388 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) [2021-06-05 22:35:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:42,039 INFO L93 Difference]: Finished difference Result 8592 states and 37381 transitions. [2021-06-05 22:35:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:35:42,039 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 [2021-06-05 22:35:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:42,058 INFO L225 Difference]: With dead ends: 8592 [2021-06-05 22:35:42,058 INFO L226 Difference]: Without dead ends: 8574 [2021-06-05 22:35:42,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1207.9ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:35:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8574 states. [2021-06-05 22:35:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8574 to 7731. [2021-06-05 22:35:42,182 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) [2021-06-05 22:35:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 34143 transitions. [2021-06-05 22:35:42,202 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 34143 transitions. Word has length 33 [2021-06-05 22:35:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:42,202 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 34143 transitions. [2021-06-05 22:35:42,203 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) [2021-06-05 22:35:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 34143 transitions. [2021-06-05 22:35:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:42,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:42,215 INFO L554 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] [2021-06-05 22:35:42,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 22:35:42,416 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1041440786, now seen corresponding path program 118 times [2021-06-05 22:35:42,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:42,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203520928] [2021-06-05 22:35:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:42,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:42,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203520928] [2021-06-05 22:35:42,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203520928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:42,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957268177] [2021-06-05 22:35:42,596 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 [2021-06-05 22:35:42,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:42,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:42,805 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 [2021-06-05 22:35:42,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:42,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:42,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:42,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:35:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:42,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957268177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:42,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:42,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:35:42,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899418061] [2021-06-05 22:35:42,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:42,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:42,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:42,881 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) [2021-06-05 22:35:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:44,274 INFO L93 Difference]: Finished difference Result 9047 states and 39227 transitions. [2021-06-05 22:35:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:35:44,274 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 [2021-06-05 22:35:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:44,294 INFO L225 Difference]: With dead ends: 9047 [2021-06-05 22:35:44,294 INFO L226 Difference]: Without dead ends: 9010 [2021-06-05 22:35:44,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1048.0ms TimeCoverageRelationStatistics Valid=302, Invalid=2148, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:35:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-06-05 22:35:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 7834. [2021-06-05 22:35:44,416 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) [2021-06-05 22:35:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7834 states to 7834 states and 34623 transitions. [2021-06-05 22:35:44,437 INFO L78 Accepts]: Start accepts. Automaton has 7834 states and 34623 transitions. Word has length 33 [2021-06-05 22:35:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:44,437 INFO L482 AbstractCegarLoop]: Abstraction has 7834 states and 34623 transitions. [2021-06-05 22:35:44,437 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) [2021-06-05 22:35:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 7834 states and 34623 transitions. [2021-06-05 22:35:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:44,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:44,450 INFO L554 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] [2021-06-05 22:35:44,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:44,651 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash -123357794, now seen corresponding path program 119 times [2021-06-05 22:35:44,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:44,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396938923] [2021-06-05 22:35:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:44,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:44,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396938923] [2021-06-05 22:35:44,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396938923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:44,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228295844] [2021-06-05 22:35:44,830 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 [2021-06-05 22:35:44,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:35:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:45,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:45,032 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 [2021-06-05 22:35:45,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:45,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:45,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:45,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:35:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:45,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228295844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:45,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:45,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:45,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084993874] [2021-06-05 22:35:45,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:45,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:45,116 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) [2021-06-05 22:35:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:47,001 INFO L93 Difference]: Finished difference Result 9387 states and 40647 transitions. [2021-06-05 22:35:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:35:47,001 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 [2021-06-05 22:35:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:47,023 INFO L225 Difference]: With dead ends: 9387 [2021-06-05 22:35:47,023 INFO L226 Difference]: Without dead ends: 9341 [2021-06-05 22:35:47,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1321.0ms TimeCoverageRelationStatistics Valid=369, Invalid=2601, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:35:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-05 22:35:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7791. [2021-06-05 22:35:47,152 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) [2021-06-05 22:35:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 34463 transitions. [2021-06-05 22:35:47,172 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 34463 transitions. Word has length 33 [2021-06-05 22:35:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:47,173 INFO L482 AbstractCegarLoop]: Abstraction has 7791 states and 34463 transitions. [2021-06-05 22:35:47,173 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) [2021-06-05 22:35:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 34463 transitions. [2021-06-05 22:35:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:47,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:47,185 INFO L554 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] [2021-06-05 22:35:47,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:47,386 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1236417738, now seen corresponding path program 120 times [2021-06-05 22:35:47,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:47,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232092961] [2021-06-05 22:35:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:47,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:47,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232092961] [2021-06-05 22:35:47,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232092961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:47,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684103830] [2021-06-05 22:35:47,572 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 [2021-06-05 22:35:47,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:35:47,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:47,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:47,795 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:47,795 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 [2021-06-05 22:35:47,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:47,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:47,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:47,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:35:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684103830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:48,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:48,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:35:48,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629456276] [2021-06-05 22:35:48,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:35:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:35:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:35:48,013 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) [2021-06-05 22:35:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:49,825 INFO L93 Difference]: Finished difference Result 8405 states and 36936 transitions. [2021-06-05 22:35:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:35:49,825 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 [2021-06-05 22:35:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:49,845 INFO L225 Difference]: With dead ends: 8405 [2021-06-05 22:35:49,845 INFO L226 Difference]: Without dead ends: 8376 [2021-06-05 22:35:49,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1409.1ms TimeCoverageRelationStatistics Valid=266, Invalid=2386, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:35:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-06-05 22:35:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 7824. [2021-06-05 22:35:49,963 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) [2021-06-05 22:35:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 34608 transitions. [2021-06-05 22:35:49,984 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 34608 transitions. Word has length 33 [2021-06-05 22:35:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:49,985 INFO L482 AbstractCegarLoop]: Abstraction has 7824 states and 34608 transitions. [2021-06-05 22:35:49,985 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) [2021-06-05 22:35:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 34608 transitions. [2021-06-05 22:35:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:49,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:49,998 INFO L554 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] [2021-06-05 22:35:50,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:50,199 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1589557228, now seen corresponding path program 121 times [2021-06-05 22:35:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:50,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938232728] [2021-06-05 22:35:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:50,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:50,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938232728] [2021-06-05 22:35:50,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938232728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:50,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793650531] [2021-06-05 22:35:50,385 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 [2021-06-05 22:35:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:50,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:50,560 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 [2021-06-05 22:35:50,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:50,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:50,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:50,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:35:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:50,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793650531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:50,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:50,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:50,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583854568] [2021-06-05 22:35:50,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:50,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:50,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:50,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:50,663 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) [2021-06-05 22:35:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:52,348 INFO L93 Difference]: Finished difference Result 9078 states and 39532 transitions. [2021-06-05 22:35:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:35:52,348 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 [2021-06-05 22:35:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:52,369 INFO L225 Difference]: With dead ends: 9078 [2021-06-05 22:35:52,369 INFO L226 Difference]: Without dead ends: 9048 [2021-06-05 22:35:52,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1326.4ms TimeCoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:35:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2021-06-05 22:35:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 7961. [2021-06-05 22:35:52,494 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) [2021-06-05 22:35:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7961 states to 7961 states and 35238 transitions. [2021-06-05 22:35:52,516 INFO L78 Accepts]: Start accepts. Automaton has 7961 states and 35238 transitions. Word has length 33 [2021-06-05 22:35:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:52,516 INFO L482 AbstractCegarLoop]: Abstraction has 7961 states and 35238 transitions. [2021-06-05 22:35:52,516 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) [2021-06-05 22:35:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7961 states and 35238 transitions. [2021-06-05 22:35:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:52,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:52,529 INFO L554 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] [2021-06-05 22:35:52,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 22:35:52,730 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash 848175060, now seen corresponding path program 122 times [2021-06-05 22:35:52,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:52,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832674866] [2021-06-05 22:35:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:52,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832674866] [2021-06-05 22:35:52,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832674866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129379732] [2021-06-05 22:35:52,910 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 [2021-06-05 22:35:52,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:52,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:35:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:53,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:53,152 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 [2021-06-05 22:35:53,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:53,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:35:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:53,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129379732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:53,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:53,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:35:53,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117741663] [2021-06-05 22:35:53,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:53,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:53,308 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) [2021-06-05 22:35:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:55,799 INFO L93 Difference]: Finished difference Result 8788 states and 38396 transitions. [2021-06-05 22:35:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:35:55,799 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 [2021-06-05 22:35:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:55,819 INFO L225 Difference]: With dead ends: 8788 [2021-06-05 22:35:55,819 INFO L226 Difference]: Without dead ends: 8743 [2021-06-05 22:35:55,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2093.4ms TimeCoverageRelationStatistics Valid=582, Invalid=3974, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:35:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8743 states. [2021-06-05 22:35:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8743 to 7902. [2021-06-05 22:35:55,940 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) [2021-06-05 22:35:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7902 states to 7902 states and 35000 transitions. [2021-06-05 22:35:55,962 INFO L78 Accepts]: Start accepts. Automaton has 7902 states and 35000 transitions. Word has length 33 [2021-06-05 22:35:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:55,962 INFO L482 AbstractCegarLoop]: Abstraction has 7902 states and 35000 transitions. [2021-06-05 22:35:55,962 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) [2021-06-05 22:35:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7902 states and 35000 transitions. [2021-06-05 22:35:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:55,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:55,975 INFO L554 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] [2021-06-05 22:35:56,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 22:35:56,175 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1958313838, now seen corresponding path program 123 times [2021-06-05 22:35:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:56,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856675469] [2021-06-05 22:35:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:56,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:56,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856675469] [2021-06-05 22:35:56,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856675469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:56,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198557444] [2021-06-05 22:35:56,362 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 [2021-06-05 22:35:56,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:35:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:35:56,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:56,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:56,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:56,540 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 [2021-06-05 22:35:56,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:56,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:56,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:56,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 22:35:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:56,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198557444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:56,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:56,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:35:56,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542425834] [2021-06-05 22:35:56,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:35:56,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:56,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:35:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:56,767 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) [2021-06-05 22:35:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:58,332 INFO L93 Difference]: Finished difference Result 8918 states and 38987 transitions. [2021-06-05 22:35:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:35:58,332 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 [2021-06-05 22:35:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:58,354 INFO L225 Difference]: With dead ends: 8918 [2021-06-05 22:35:58,354 INFO L226 Difference]: Without dead ends: 8888 [2021-06-05 22:35:58,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1235.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:35:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-06-05 22:35:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 7972. [2021-06-05 22:35:58,486 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) [2021-06-05 22:35:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 35320 transitions. [2021-06-05 22:35:58,508 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 35320 transitions. Word has length 33 [2021-06-05 22:35:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:58,508 INFO L482 AbstractCegarLoop]: Abstraction has 7972 states and 35320 transitions. [2021-06-05 22:35:58,508 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) [2021-06-05 22:35:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 35320 transitions. [2021-06-05 22:35:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:35:58,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:58,522 INFO L554 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] [2021-06-05 22:35:58,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:58,722 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:58,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2147155404, now seen corresponding path program 124 times [2021-06-05 22:35:58,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:58,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965110520] [2021-06-05 22:35:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:58,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:58,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965110520] [2021-06-05 22:35:58,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965110520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:58,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897777151] [2021-06-05 22:35:58,906 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 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 [2021-06-05 22:35:58,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:58,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:58,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:35:58,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:59,071 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 21 treesize of output 13 [2021-06-05 22:35:59,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:59,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:35:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:59,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897777151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:59,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:59,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:59,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175654638] [2021-06-05 22:35:59,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:59,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:59,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:59,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:59,172 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) [2021-06-05 22:36:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:00,714 INFO L93 Difference]: Finished difference Result 9321 states and 40526 transitions. [2021-06-05 22:36:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:36:00,715 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 [2021-06-05 22:36:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:00,736 INFO L225 Difference]: With dead ends: 9321 [2021-06-05 22:36:00,736 INFO L226 Difference]: Without dead ends: 9303 [2021-06-05 22:36:00,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1214.0ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:36:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2021-06-05 22:36:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 8128. [2021-06-05 22:36:00,926 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) [2021-06-05 22:36:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8128 states to 8128 states and 36043 transitions. [2021-06-05 22:36:00,947 INFO L78 Accepts]: Start accepts. Automaton has 8128 states and 36043 transitions. Word has length 33 [2021-06-05 22:36:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:00,947 INFO L482 AbstractCegarLoop]: Abstraction has 8128 states and 36043 transitions. [2021-06-05 22:36:00,947 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) [2021-06-05 22:36:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8128 states and 36043 transitions. [2021-06-05 22:36:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:00,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:00,960 INFO L554 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] [2021-06-05 22:36:01,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:01,160 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 479418450, now seen corresponding path program 125 times [2021-06-05 22:36:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:01,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303161542] [2021-06-05 22:36:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:01,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303161542] [2021-06-05 22:36:01,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303161542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134788903] [2021-06-05 22:36:01,341 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 [2021-06-05 22:36:01,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:36:01,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:01,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:01,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:36:01,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:01,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:01,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:01,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:36:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:01,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134788903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:01,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:01,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:36:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031961197] [2021-06-05 22:36:01,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:01,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:01,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:01,610 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) [2021-06-05 22:36:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:03,146 INFO L93 Difference]: Finished difference Result 9356 states and 40639 transitions. [2021-06-05 22:36:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:36:03,146 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 [2021-06-05 22:36:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:03,166 INFO L225 Difference]: With dead ends: 9356 [2021-06-05 22:36:03,166 INFO L226 Difference]: Without dead ends: 9307 [2021-06-05 22:36:03,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1240.0ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:36:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-06-05 22:36:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 8091. [2021-06-05 22:36:03,284 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) [2021-06-05 22:36:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 35887 transitions. [2021-06-05 22:36:03,305 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 35887 transitions. Word has length 33 [2021-06-05 22:36:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:03,305 INFO L482 AbstractCegarLoop]: Abstraction has 8091 states and 35887 transitions. [2021-06-05 22:36:03,305 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) [2021-06-05 22:36:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 35887 transitions. [2021-06-05 22:36:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:03,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:03,318 INFO L554 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] [2021-06-05 22:36:03,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:03,518 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -362879790, now seen corresponding path program 126 times [2021-06-05 22:36:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:03,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794665594] [2021-06-05 22:36:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:03,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794665594] [2021-06-05 22:36:03,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794665594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424633660] [2021-06-05 22:36:03,710 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 [2021-06-05 22:36:03,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:03,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:03,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:03,887 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 [2021-06-05 22:36:03,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:03,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:03,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:03,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:36:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:04,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424633660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:04,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:04,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:36:04,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109022455] [2021-06-05 22:36:04,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:04,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:04,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:04,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:04,114 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) [2021-06-05 22:36:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:06,265 INFO L93 Difference]: Finished difference Result 8894 states and 39182 transitions. [2021-06-05 22:36:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:36:06,265 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 [2021-06-05 22:36:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:06,286 INFO L225 Difference]: With dead ends: 8894 [2021-06-05 22:36:06,286 INFO L226 Difference]: Without dead ends: 8875 [2021-06-05 22:36:06,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1584.8ms TimeCoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:36:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2021-06-05 22:36:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 8079. [2021-06-05 22:36:06,404 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) [2021-06-05 22:36:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 35841 transitions. [2021-06-05 22:36:06,426 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 35841 transitions. Word has length 33 [2021-06-05 22:36:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:06,426 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 35841 transitions. [2021-06-05 22:36:06,426 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) [2021-06-05 22:36:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 35841 transitions. [2021-06-05 22:36:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:06,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:06,439 INFO L554 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] [2021-06-05 22:36:06,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:06,640 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:06,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1196989280, now seen corresponding path program 127 times [2021-06-05 22:36:06,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:06,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132527251] [2021-06-05 22:36:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:06,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132527251] [2021-06-05 22:36:06,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132527251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868929831] [2021-06-05 22:36:06,822 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 [2021-06-05 22:36:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:07,019 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 [2021-06-05 22:36:07,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:07,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:07,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:07,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:36:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:07,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868929831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:07,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:07,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:07,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628760356] [2021-06-05 22:36:07,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:07,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:07,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:07,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:07,103 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) [2021-06-05 22:36:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:08,895 INFO L93 Difference]: Finished difference Result 9800 states and 42585 transitions. [2021-06-05 22:36:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:36:08,895 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 [2021-06-05 22:36:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:08,970 INFO L225 Difference]: With dead ends: 9800 [2021-06-05 22:36:08,971 INFO L226 Difference]: Without dead ends: 9755 [2021-06-05 22:36:08,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1216.5ms TimeCoverageRelationStatistics Valid=308, Invalid=2344, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:36:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2021-06-05 22:36:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 8186. [2021-06-05 22:36:09,106 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) [2021-06-05 22:36:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8186 states to 8186 states and 36342 transitions. [2021-06-05 22:36:09,128 INFO L78 Accepts]: Start accepts. Automaton has 8186 states and 36342 transitions. Word has length 33 [2021-06-05 22:36:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:09,128 INFO L482 AbstractCegarLoop]: Abstraction has 8186 states and 36342 transitions. [2021-06-05 22:36:09,129 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) [2021-06-05 22:36:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8186 states and 36342 transitions. [2021-06-05 22:36:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:09,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:09,142 INFO L554 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] [2021-06-05 22:36:09,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 22:36:09,343 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:09,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1013385218, now seen corresponding path program 128 times [2021-06-05 22:36:09,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:09,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566246059] [2021-06-05 22:36:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:09,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:09,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566246059] [2021-06-05 22:36:09,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566246059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:09,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299810003] [2021-06-05 22:36:09,536 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 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 [2021-06-05 22:36:09,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:09,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:36:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:09,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:09,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:09,754 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 [2021-06-05 22:36:09,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:09,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:09,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:09,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:39 [2021-06-05 22:36:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:09,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299810003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:09,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:09,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:36:09,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831413061] [2021-06-05 22:36:09,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:09,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:09,884 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) [2021-06-05 22:36:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:11,817 INFO L93 Difference]: Finished difference Result 9320 states and 40753 transitions. [2021-06-05 22:36:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:36:11,818 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 [2021-06-05 22:36:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:11,838 INFO L225 Difference]: With dead ends: 9320 [2021-06-05 22:36:11,838 INFO L226 Difference]: Without dead ends: 9285 [2021-06-05 22:36:11,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1531.3ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:36:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9285 states. [2021-06-05 22:36:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9285 to 8115. [2021-06-05 22:36:11,955 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) [2021-06-05 22:36:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8115 states to 8115 states and 36051 transitions. [2021-06-05 22:36:11,976 INFO L78 Accepts]: Start accepts. Automaton has 8115 states and 36051 transitions. Word has length 33 [2021-06-05 22:36:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:11,977 INFO L482 AbstractCegarLoop]: Abstraction has 8115 states and 36051 transitions. [2021-06-05 22:36:11,977 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) [2021-06-05 22:36:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 8115 states and 36051 transitions. [2021-06-05 22:36:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:11,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:11,990 INFO L554 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] [2021-06-05 22:36:12,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 22:36:12,190 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:12,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:12,190 INFO L82 PathProgramCache]: Analyzing trace with hash -811191210, now seen corresponding path program 129 times [2021-06-05 22:36:12,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:12,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195267961] [2021-06-05 22:36:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:12,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195267961] [2021-06-05 22:36:12,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195267961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952518356] [2021-06-05 22:36:12,369 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 [2021-06-05 22:36:12,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:36:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:12,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:12,530 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 [2021-06-05 22:36:12,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:12,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:12,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:12,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:36:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:12,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952518356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:12,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:12,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:36:12,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626235852] [2021-06-05 22:36:12,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:12,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:12,803 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) [2021-06-05 22:36:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:14,030 INFO L93 Difference]: Finished difference Result 8608 states and 38009 transitions. [2021-06-05 22:36:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:14,030 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 [2021-06-05 22:36:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:14,049 INFO L225 Difference]: With dead ends: 8608 [2021-06-05 22:36:14,049 INFO L226 Difference]: Without dead ends: 8595 [2021-06-05 22:36:14,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1218.6ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:36:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2021-06-05 22:36:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 8112. [2021-06-05 22:36:14,159 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) [2021-06-05 22:36:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 36041 transitions. [2021-06-05 22:36:14,180 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 36041 transitions. Word has length 33 [2021-06-05 22:36:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:14,180 INFO L482 AbstractCegarLoop]: Abstraction has 8112 states and 36041 transitions. [2021-06-05 22:36:14,180 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) [2021-06-05 22:36:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 36041 transitions. [2021-06-05 22:36:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:14,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:14,193 INFO L554 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] [2021-06-05 22:36:14,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 22:36:14,394 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1490078986, now seen corresponding path program 130 times [2021-06-05 22:36:14,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:14,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504807471] [2021-06-05 22:36:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:14,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504807471] [2021-06-05 22:36:14,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504807471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888447973] [2021-06-05 22:36:14,577 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 [2021-06-05 22:36:14,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:14,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:14,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:14,742 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 [2021-06-05 22:36:14,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:14,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:36:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888447973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:14,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:14,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077558975] [2021-06-05 22:36:14,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:14,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:14,841 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) [2021-06-05 22:36:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:16,283 INFO L93 Difference]: Finished difference Result 9563 states and 41697 transitions. [2021-06-05 22:36:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:36:16,283 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 [2021-06-05 22:36:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:16,305 INFO L225 Difference]: With dead ends: 9563 [2021-06-05 22:36:16,306 INFO L226 Difference]: Without dead ends: 9533 [2021-06-05 22:36:16,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1274.9ms TimeCoverageRelationStatistics Valid=468, Invalid=2288, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:36:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-05 22:36:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 8244. [2021-06-05 22:36:16,492 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) [2021-06-05 22:36:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8244 states to 8244 states and 36660 transitions. [2021-06-05 22:36:16,515 INFO L78 Accepts]: Start accepts. Automaton has 8244 states and 36660 transitions. Word has length 33 [2021-06-05 22:36:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:16,515 INFO L482 AbstractCegarLoop]: Abstraction has 8244 states and 36660 transitions. [2021-06-05 22:36:16,515 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) [2021-06-05 22:36:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8244 states and 36660 transitions. [2021-06-05 22:36:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:16,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:16,529 INFO L554 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] [2021-06-05 22:36:16,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:16,730 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:16,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:16,730 INFO L82 PathProgramCache]: Analyzing trace with hash -367156022, now seen corresponding path program 131 times [2021-06-05 22:36:16,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:16,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691692827] [2021-06-05 22:36:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:16,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:16,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691692827] [2021-06-05 22:36:16,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691692827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:16,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533618246] [2021-06-05 22:36:16,899 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 [2021-06-05 22:36:16,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:36:16,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:17,058 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 [2021-06-05 22:36:17,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:17,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:17,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:17,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:36:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:17,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533618246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:17,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:17,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:17,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672484921] [2021-06-05 22:36:17,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:17,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:17,148 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) [2021-06-05 22:36:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:18,232 INFO L93 Difference]: Finished difference Result 9270 states and 40533 transitions. [2021-06-05 22:36:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:36:18,232 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 [2021-06-05 22:36:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:18,254 INFO L225 Difference]: With dead ends: 9270 [2021-06-05 22:36:18,254 INFO L226 Difference]: Without dead ends: 9221 [2021-06-05 22:36:18,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 899.5ms TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:36:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9221 states. [2021-06-05 22:36:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9221 to 8148. [2021-06-05 22:36:18,390 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) [2021-06-05 22:36:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8148 states to 8148 states and 36239 transitions. [2021-06-05 22:36:18,412 INFO L78 Accepts]: Start accepts. Automaton has 8148 states and 36239 transitions. Word has length 33 [2021-06-05 22:36:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:18,412 INFO L482 AbstractCegarLoop]: Abstraction has 8148 states and 36239 transitions. [2021-06-05 22:36:18,412 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) [2021-06-05 22:36:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 8148 states and 36239 transitions. [2021-06-05 22:36:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:18,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:18,425 INFO L554 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] [2021-06-05 22:36:18,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 22:36:18,625 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1856844270, now seen corresponding path program 132 times [2021-06-05 22:36:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:18,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699057847] [2021-06-05 22:36:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:18,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699057847] [2021-06-05 22:36:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699057847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590562987] [2021-06-05 22:36:18,797 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 [2021-06-05 22:36:18,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:36:18,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:18,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:19,011 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:19,011 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 [2021-06-05 22:36:19,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:19,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:19,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:19,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 22:36:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:19,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590562987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:19,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:19,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 22:36:19,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916977179] [2021-06-05 22:36:19,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:36:19,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:19,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:36:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:36:19,230 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) [2021-06-05 22:36:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:20,831 INFO L93 Difference]: Finished difference Result 9264 states and 40489 transitions. [2021-06-05 22:36:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:36:20,831 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 [2021-06-05 22:36:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:20,851 INFO L225 Difference]: With dead ends: 9264 [2021-06-05 22:36:20,851 INFO L226 Difference]: Without dead ends: 9255 [2021-06-05 22:36:20,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1298.5ms TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:36:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-06-05 22:36:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8249. [2021-06-05 22:36:20,970 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) [2021-06-05 22:36:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8249 states to 8249 states and 36690 transitions. [2021-06-05 22:36:20,991 INFO L78 Accepts]: Start accepts. Automaton has 8249 states and 36690 transitions. Word has length 33 [2021-06-05 22:36:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:20,991 INFO L482 AbstractCegarLoop]: Abstraction has 8249 states and 36690 transitions. [2021-06-05 22:36:20,991 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) [2021-06-05 22:36:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 8249 states and 36690 transitions. [2021-06-05 22:36:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:21,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:21,004 INFO L554 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] [2021-06-05 22:36:21,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 22:36:21,205 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash 188450828, now seen corresponding path program 133 times [2021-06-05 22:36:21,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:21,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590479311] [2021-06-05 22:36:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:21,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590479311] [2021-06-05 22:36:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590479311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856772536] [2021-06-05 22:36:21,377 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 [2021-06-05 22:36:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:21,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:21,534 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 [2021-06-05 22:36:21,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:21,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:21,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:21,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:36:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:21,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856772536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:21,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:21,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:21,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161684413] [2021-06-05 22:36:21,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:21,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:21,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:21,626 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) [2021-06-05 22:36:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:22,768 INFO L93 Difference]: Finished difference Result 9648 states and 41960 transitions. [2021-06-05 22:36:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:36:22,769 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 [2021-06-05 22:36:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:22,790 INFO L225 Difference]: With dead ends: 9648 [2021-06-05 22:36:22,790 INFO L226 Difference]: Without dead ends: 9605 [2021-06-05 22:36:22,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 971.8ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:36:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-06-05 22:36:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8364. [2021-06-05 22:36:22,920 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) [2021-06-05 22:36:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8364 states to 8364 states and 37217 transitions. [2021-06-05 22:36:22,943 INFO L78 Accepts]: Start accepts. Automaton has 8364 states and 37217 transitions. Word has length 33 [2021-06-05 22:36:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:22,943 INFO L482 AbstractCegarLoop]: Abstraction has 8364 states and 37217 transitions. [2021-06-05 22:36:22,944 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) [2021-06-05 22:36:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8364 states and 37217 transitions. [2021-06-05 22:36:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:22,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:22,958 INFO L554 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] [2021-06-05 22:36:23,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 22:36:23,158 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1933373654, now seen corresponding path program 134 times [2021-06-05 22:36:23,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:23,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302486479] [2021-06-05 22:36:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:23,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:23,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302486479] [2021-06-05 22:36:23,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302486479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:23,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579487153] [2021-06-05 22:36:23,349 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 [2021-06-05 22:36:23,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:36:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:23,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:23,518 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 [2021-06-05 22:36:23,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:23,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:23,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:23,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 22:36:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:23,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579487153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:23,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:23,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:36:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595211092] [2021-06-05 22:36:23,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:23,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:23,771 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) [2021-06-05 22:36:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:24,926 INFO L93 Difference]: Finished difference Result 8921 states and 39444 transitions. [2021-06-05 22:36:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:36:24,926 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 [2021-06-05 22:36:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:24,946 INFO L225 Difference]: With dead ends: 8921 [2021-06-05 22:36:24,947 INFO L226 Difference]: Without dead ends: 8908 [2021-06-05 22:36:24,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1033.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:36:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8908 states. [2021-06-05 22:36:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8908 to 8342. [2021-06-05 22:36:25,059 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) [2021-06-05 22:36:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 37140 transitions. [2021-06-05 22:36:25,081 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 37140 transitions. Word has length 33 [2021-06-05 22:36:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:25,081 INFO L482 AbstractCegarLoop]: Abstraction has 8342 states and 37140 transitions. [2021-06-05 22:36:25,081 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) [2021-06-05 22:36:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 37140 transitions. [2021-06-05 22:36:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:25,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:25,095 INFO L554 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] [2021-06-05 22:36:25,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 22:36:25,295 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1989389074, now seen corresponding path program 135 times [2021-06-05 22:36:25,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:25,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053340799] [2021-06-05 22:36:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:25,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053340799] [2021-06-05 22:36:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053340799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556605562] [2021-06-05 22:36:25,543 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 [2021-06-05 22:36:25,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:36:25,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:25,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:25,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:25,701 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 [2021-06-05 22:36:25,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:25,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:25,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:25,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:36:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:25,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556605562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:25,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:25,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:36:25,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341138114] [2021-06-05 22:36:25,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:25,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:25,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:25,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:25,906 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) [2021-06-05 22:36:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:28,527 INFO L93 Difference]: Finished difference Result 9584 states and 41393 transitions. [2021-06-05 22:36:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:36:28,527 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 [2021-06-05 22:36:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:28,549 INFO L225 Difference]: With dead ends: 9584 [2021-06-05 22:36:28,549 INFO L226 Difference]: Without dead ends: 9553 [2021-06-05 22:36:28,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 2305.3ms TimeCoverageRelationStatistics Valid=512, Invalid=2458, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:36:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9553 states. [2021-06-05 22:36:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9553 to 8381. [2021-06-05 22:36:28,694 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) [2021-06-05 22:36:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8381 states to 8381 states and 37324 transitions. [2021-06-05 22:36:28,716 INFO L78 Accepts]: Start accepts. Automaton has 8381 states and 37324 transitions. Word has length 33 [2021-06-05 22:36:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:28,716 INFO L482 AbstractCegarLoop]: Abstraction has 8381 states and 37324 transitions. [2021-06-05 22:36:28,716 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) [2021-06-05 22:36:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8381 states and 37324 transitions. [2021-06-05 22:36:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:28,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:28,729 INFO L554 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] [2021-06-05 22:36:28,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 22:36:28,930 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:28,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1791432998, now seen corresponding path program 136 times [2021-06-05 22:36:28,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:28,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300340283] [2021-06-05 22:36:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:29,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:29,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300340283] [2021-06-05 22:36:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300340283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:29,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962992856] [2021-06-05 22:36:29,226 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 [2021-06-05 22:36:29,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:29,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:29,386 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 [2021-06-05 22:36:29,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:29,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:29,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:29,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:36:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:29,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962992856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:29,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:29,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:29,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851862059] [2021-06-05 22:36:29,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:29,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:29,483 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) [2021-06-05 22:36:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:31,492 INFO L93 Difference]: Finished difference Result 9674 states and 42165 transitions. [2021-06-05 22:36:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:36:31,493 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 [2021-06-05 22:36:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:31,514 INFO L225 Difference]: With dead ends: 9674 [2021-06-05 22:36:31,514 INFO L226 Difference]: Without dead ends: 9648 [2021-06-05 22:36:31,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1819.9ms TimeCoverageRelationStatistics Valid=546, Invalid=2316, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:36:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9648 states. [2021-06-05 22:36:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9648 to 8434. [2021-06-05 22:36:31,678 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) [2021-06-05 22:36:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8434 states to 8434 states and 37539 transitions. [2021-06-05 22:36:31,700 INFO L78 Accepts]: Start accepts. Automaton has 8434 states and 37539 transitions. Word has length 33 [2021-06-05 22:36:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:31,700 INFO L482 AbstractCegarLoop]: Abstraction has 8434 states and 37539 transitions. [2021-06-05 22:36:31,700 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) [2021-06-05 22:36:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8434 states and 37539 transitions. [2021-06-05 22:36:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:31,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:31,713 INFO L554 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] [2021-06-05 22:36:31,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:31,914 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:31,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:31,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1481631034, now seen corresponding path program 137 times [2021-06-05 22:36:31,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:31,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353125994] [2021-06-05 22:36:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:32,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353125994] [2021-06-05 22:36:32,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353125994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629611503] [2021-06-05 22:36:32,094 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 [2021-06-05 22:36:32,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:36:32,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:32,251 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 [2021-06-05 22:36:32,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:32,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:36:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629611503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:32,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:36:32,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047344171] [2021-06-05 22:36:32,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:32,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:32,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:32,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:32,342 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) [2021-06-05 22:36:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:33,676 INFO L93 Difference]: Finished difference Result 9408 states and 41336 transitions. [2021-06-05 22:36:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:36:33,677 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 [2021-06-05 22:36:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:33,697 INFO L225 Difference]: With dead ends: 9408 [2021-06-05 22:36:33,697 INFO L226 Difference]: Without dead ends: 9297 [2021-06-05 22:36:33,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1203.3ms TimeCoverageRelationStatistics Valid=450, Invalid=2000, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:36:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9297 states. [2021-06-05 22:36:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9297 to 8394. [2021-06-05 22:36:33,810 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) [2021-06-05 22:36:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8394 states to 8394 states and 37365 transitions. [2021-06-05 22:36:33,833 INFO L78 Accepts]: Start accepts. Automaton has 8394 states and 37365 transitions. Word has length 33 [2021-06-05 22:36:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:33,833 INFO L482 AbstractCegarLoop]: Abstraction has 8394 states and 37365 transitions. [2021-06-05 22:36:33,833 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) [2021-06-05 22:36:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 8394 states and 37365 transitions. [2021-06-05 22:36:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:33,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:33,846 INFO L554 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] [2021-06-05 22:36:34,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 22:36:34,047 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:34,047 INFO L82 PathProgramCache]: Analyzing trace with hash -500910676, now seen corresponding path program 138 times [2021-06-05 22:36:34,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:34,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181741820] [2021-06-05 22:36:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:34,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:34,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181741820] [2021-06-05 22:36:34,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181741820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:34,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617601170] [2021-06-05 22:36:34,309 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 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 [2021-06-05 22:36:34,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:36:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:34,517 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:34,518 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 [2021-06-05 22:36:34,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:34,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:34,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:34,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:36:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:34,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617601170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:34,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:34,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:36:34,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920114817] [2021-06-05 22:36:34,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:36:34,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:36:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:36:34,706 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) [2021-06-05 22:36:35,213 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 22:36:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:36,765 INFO L93 Difference]: Finished difference Result 9276 states and 40664 transitions. [2021-06-05 22:36:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:36:36,765 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 [2021-06-05 22:36:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:36,787 INFO L225 Difference]: With dead ends: 9276 [2021-06-05 22:36:36,787 INFO L226 Difference]: Without dead ends: 9230 [2021-06-05 22:36:36,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1912.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:36:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-06-05 22:36:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 8500. [2021-06-05 22:36:36,909 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) [2021-06-05 22:36:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8500 states to 8500 states and 37868 transitions. [2021-06-05 22:36:36,932 INFO L78 Accepts]: Start accepts. Automaton has 8500 states and 37868 transitions. Word has length 33 [2021-06-05 22:36:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:36,932 INFO L482 AbstractCegarLoop]: Abstraction has 8500 states and 37868 transitions. [2021-06-05 22:36:36,932 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) [2021-06-05 22:36:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 8500 states and 37868 transitions. [2021-06-05 22:36:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:36,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:36,947 INFO L554 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] [2021-06-05 22:36:37,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:37,147 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:37,148 INFO L82 PathProgramCache]: Analyzing trace with hash -689752242, now seen corresponding path program 139 times [2021-06-05 22:36:37,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:37,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873825216] [2021-06-05 22:36:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:37,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:37,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873825216] [2021-06-05 22:36:37,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873825216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:37,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466678987] [2021-06-05 22:36:37,477 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 [2021-06-05 22:36:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:37,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:37,634 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 [2021-06-05 22:36:37,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:37,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:37,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:37,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:36:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:37,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466678987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:37,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:37,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925043948] [2021-06-05 22:36:37,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:37,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:37,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:37,739 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) [2021-06-05 22:36:39,406 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 22:36:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:39,832 INFO L93 Difference]: Finished difference Result 9775 states and 42697 transitions. [2021-06-05 22:36:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:36:39,832 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 [2021-06-05 22:36:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:39,854 INFO L225 Difference]: With dead ends: 9775 [2021-06-05 22:36:39,854 INFO L226 Difference]: Without dead ends: 9757 [2021-06-05 22:36:39,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1857.6ms TimeCoverageRelationStatistics Valid=535, Invalid=2327, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:36:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-05 22:36:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 8467. [2021-06-05 22:36:39,974 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) [2021-06-05 22:36:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8467 states to 8467 states and 37679 transitions. [2021-06-05 22:36:39,996 INFO L78 Accepts]: Start accepts. Automaton has 8467 states and 37679 transitions. Word has length 33 [2021-06-05 22:36:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:39,996 INFO L482 AbstractCegarLoop]: Abstraction has 8467 states and 37679 transitions. [2021-06-05 22:36:39,996 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) [2021-06-05 22:36:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8467 states and 37679 transitions. [2021-06-05 22:36:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:40,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:40,010 INFO L554 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] [2021-06-05 22:36:40,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 22:36:40,210 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1936821612, now seen corresponding path program 140 times [2021-06-05 22:36:40,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:40,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783092032] [2021-06-05 22:36:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:40,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783092032] [2021-06-05 22:36:40,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783092032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013747247] [2021-06-05 22:36:40,493 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 [2021-06-05 22:36:40,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:40,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:40,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:36:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:40,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:40,663 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 [2021-06-05 22:36:40,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:40,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:40,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:40,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-05 22:36:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:40,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013747247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:40,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:40,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:36:40,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104948577] [2021-06-05 22:36:40,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:40,844 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) [2021-06-05 22:36:41,658 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 22:36:41,929 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 22:36:42,453 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 22:36:43,589 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 22:36:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:44,314 INFO L93 Difference]: Finished difference Result 10035 states and 43178 transitions. [2021-06-05 22:36:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:36:44,314 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 [2021-06-05 22:36:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:44,336 INFO L225 Difference]: With dead ends: 10035 [2021-06-05 22:36:44,336 INFO L226 Difference]: Without dead ends: 9956 [2021-06-05 22:36:44,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 3019.5ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:36:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9956 states. [2021-06-05 22:36:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9956 to 8418. [2021-06-05 22:36:44,466 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) [2021-06-05 22:36:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 37462 transitions. [2021-06-05 22:36:44,489 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 37462 transitions. Word has length 33 [2021-06-05 22:36:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:44,489 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 37462 transitions. [2021-06-05 22:36:44,489 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) [2021-06-05 22:36:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 37462 transitions. [2021-06-05 22:36:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:44,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:44,503 INFO L554 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] [2021-06-05 22:36:44,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:44,703 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1094523372, now seen corresponding path program 141 times [2021-06-05 22:36:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:44,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814373412] [2021-06-05 22:36:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:44,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814373412] [2021-06-05 22:36:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814373412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989266932] [2021-06-05 22:36:44,890 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 [2021-06-05 22:36:44,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:44,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:45,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:45,057 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 [2021-06-05 22:36:45,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:45,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:45,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:45,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:36:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:45,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989266932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:45,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:45,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:36:45,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848947018] [2021-06-05 22:36:45,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:45,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:45,303 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) [2021-06-05 22:36:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:47,073 INFO L93 Difference]: Finished difference Result 9273 states and 40969 transitions. [2021-06-05 22:36:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:36:47,073 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 [2021-06-05 22:36:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:47,094 INFO L225 Difference]: With dead ends: 9273 [2021-06-05 22:36:47,094 INFO L226 Difference]: Without dead ends: 9233 [2021-06-05 22:36:47,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1495.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:36:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9233 states. [2021-06-05 22:36:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9233 to 8418. [2021-06-05 22:36:47,215 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) [2021-06-05 22:36:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 37459 transitions. [2021-06-05 22:36:47,319 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 37459 transitions. Word has length 33 [2021-06-05 22:36:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:47,319 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 37459 transitions. [2021-06-05 22:36:47,319 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) [2021-06-05 22:36:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 37459 transitions. [2021-06-05 22:36:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:47,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:47,332 INFO L554 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] [2021-06-05 22:36:47,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 22:36:47,533 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1001867172, now seen corresponding path program 142 times [2021-06-05 22:36:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:47,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425306064] [2021-06-05 22:36:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:47,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425306064] [2021-06-05 22:36:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425306064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911509290] [2021-06-05 22:36:47,717 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 [2021-06-05 22:36:47,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:47,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:47,879 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 [2021-06-05 22:36:47,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:47,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:47,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:47,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:36:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:47,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911509290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:47,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:47,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:36:47,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402077122] [2021-06-05 22:36:47,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:47,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:47,975 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) [2021-06-05 22:36:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:49,565 INFO L93 Difference]: Finished difference Result 9503 states and 41774 transitions. [2021-06-05 22:36:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:36:49,565 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 [2021-06-05 22:36:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:49,586 INFO L225 Difference]: With dead ends: 9503 [2021-06-05 22:36:49,587 INFO L226 Difference]: Without dead ends: 9421 [2021-06-05 22:36:49,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1345.4ms TimeCoverageRelationStatistics Valid=399, Invalid=2151, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:36:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9421 states. [2021-06-05 22:36:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9421 to 8454. [2021-06-05 22:36:49,704 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) [2021-06-05 22:36:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8454 states to 8454 states and 37651 transitions. [2021-06-05 22:36:49,727 INFO L78 Accepts]: Start accepts. Automaton has 8454 states and 37651 transitions. Word has length 33 [2021-06-05 22:36:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:49,727 INFO L482 AbstractCegarLoop]: Abstraction has 8454 states and 37651 transitions. [2021-06-05 22:36:49,727 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) [2021-06-05 22:36:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8454 states and 37651 transitions. [2021-06-05 22:36:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:49,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:49,741 INFO L554 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] [2021-06-05 22:36:49,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 22:36:49,941 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1392200684, now seen corresponding path program 143 times [2021-06-05 22:36:49,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:49,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823106883] [2021-06-05 22:36:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:50,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:50,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823106883] [2021-06-05 22:36:50,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823106883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:50,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902915784] [2021-06-05 22:36:50,201 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 [2021-06-05 22:36:50,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:36:50,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:50,382 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 [2021-06-05 22:36:50,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:50,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:50,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:50,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:36:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:50,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902915784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:50,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:50,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:50,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831234112] [2021-06-05 22:36:50,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:50,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:50,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:50,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:50,466 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) [2021-06-05 22:36:51,676 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:36:52,114 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 22:36:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:53,961 INFO L93 Difference]: Finished difference Result 10544 states and 45844 transitions. [2021-06-05 22:36:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:36:53,961 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 [2021-06-05 22:36:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:53,985 INFO L225 Difference]: With dead ends: 10544 [2021-06-05 22:36:53,985 INFO L226 Difference]: Without dead ends: 10498 [2021-06-05 22:36:53,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 2902.2ms TimeCoverageRelationStatistics Valid=737, Invalid=4093, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:36:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10498 states. [2021-06-05 22:36:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10498 to 8651. [2021-06-05 22:36:54,121 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) [2021-06-05 22:36:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 38540 transitions. [2021-06-05 22:36:54,144 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 38540 transitions. Word has length 33 [2021-06-05 22:36:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:54,144 INFO L482 AbstractCegarLoop]: Abstraction has 8651 states and 38540 transitions. [2021-06-05 22:36:54,144 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) [2021-06-05 22:36:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 38540 transitions. [2021-06-05 22:36:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:54,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:54,158 INFO L554 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] [2021-06-05 22:36:54,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:54,358 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:54,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1045531604, now seen corresponding path program 144 times [2021-06-05 22:36:54,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:54,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208800788] [2021-06-05 22:36:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:54,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:54,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208800788] [2021-06-05 22:36:54,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208800788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:54,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596681689] [2021-06-05 22:36:54,600 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 [2021-06-05 22:36:54,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:36:54,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:54,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:54,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:54,825 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:54,825 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 [2021-06-05 22:36:54,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:36:54,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:54,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:54,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:36:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596681689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:54,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:54,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:36:54,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116061361] [2021-06-05 22:36:54,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:36:54,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:36:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:36:54,955 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) [2021-06-05 22:36:55,363 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 22:36:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:57,761 INFO L93 Difference]: Finished difference Result 10637 states and 45085 transitions. [2021-06-05 22:36:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:36:57,762 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 [2021-06-05 22:36:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:57,785 INFO L225 Difference]: With dead ends: 10637 [2021-06-05 22:36:57,785 INFO L226 Difference]: Without dead ends: 10609 [2021-06-05 22:36:57,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2500.8ms TimeCoverageRelationStatistics Valid=527, Invalid=3133, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:36:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2021-06-05 22:36:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 8693. [2021-06-05 22:36:57,922 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) [2021-06-05 22:36:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 38737 transitions. [2021-06-05 22:36:57,945 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 38737 transitions. Word has length 33 [2021-06-05 22:36:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:57,945 INFO L482 AbstractCegarLoop]: Abstraction has 8693 states and 38737 transitions. [2021-06-05 22:36:57,945 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) [2021-06-05 22:36:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 38737 transitions. [2021-06-05 22:36:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:36:57,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:57,959 INFO L554 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] [2021-06-05 22:36:58,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 22:36:58,160 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash -212643602, now seen corresponding path program 145 times [2021-06-05 22:36:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:58,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032326303] [2021-06-05 22:36:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:58,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032326303] [2021-06-05 22:36:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032326303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597918419] [2021-06-05 22:36:58,334 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 [2021-06-05 22:36:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:36:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:58,519 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 [2021-06-05 22:36:58,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:58,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:58,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:58,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:36:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:58,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597918419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:58,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:58,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:58,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129978539] [2021-06-05 22:36:58,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:58,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:58,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:58,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:58,594 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) [2021-06-05 22:36:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:59,914 INFO L93 Difference]: Finished difference Result 10026 states and 43644 transitions. [2021-06-05 22:36:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:36:59,915 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 [2021-06-05 22:36:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:59,937 INFO L225 Difference]: With dead ends: 10026 [2021-06-05 22:36:59,937 INFO L226 Difference]: Without dead ends: 9944 [2021-06-05 22:36:59,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:36:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9944 states. [2021-06-05 22:37:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9944 to 8602. [2021-06-05 22:37:00,067 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) [2021-06-05 22:37:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 38338 transitions. [2021-06-05 22:37:00,090 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 38338 transitions. Word has length 33 [2021-06-05 22:37:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:00,090 INFO L482 AbstractCegarLoop]: Abstraction has 8602 states and 38338 transitions. [2021-06-05 22:37:00,090 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) [2021-06-05 22:37:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 38338 transitions. [2021-06-05 22:37:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:00,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:00,104 INFO L554 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] [2021-06-05 22:37:00,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 22:37:00,305 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash 203233364, now seen corresponding path program 146 times [2021-06-05 22:37:00,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:00,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380876018] [2021-06-05 22:37:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:00,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380876018] [2021-06-05 22:37:00,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380876018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599722473] [2021-06-05 22:37:00,489 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 [2021-06-05 22:37:00,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:00,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:00,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:00,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:00,683 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 [2021-06-05 22:37:00,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:00,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:00,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:00,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 22:37:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:00,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599722473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:00,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:00,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:37:00,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529771792] [2021-06-05 22:37:00,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:37:00,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:00,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:37:00,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:37:00,874 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) [2021-06-05 22:37:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:02,750 INFO L93 Difference]: Finished difference Result 9708 states and 42784 transitions. [2021-06-05 22:37:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:37:02,750 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 [2021-06-05 22:37:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:02,772 INFO L225 Difference]: With dead ends: 9708 [2021-06-05 22:37:02,772 INFO L226 Difference]: Without dead ends: 9656 [2021-06-05 22:37:02,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1399.6ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:37:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9656 states. [2021-06-05 22:37:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9656 to 8590. [2021-06-05 22:37:02,899 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) [2021-06-05 22:37:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8590 states to 8590 states and 38286 transitions. [2021-06-05 22:37:02,921 INFO L78 Accepts]: Start accepts. Automaton has 8590 states and 38286 transitions. Word has length 33 [2021-06-05 22:37:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:02,921 INFO L482 AbstractCegarLoop]: Abstraction has 8590 states and 38286 transitions. [2021-06-05 22:37:02,921 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) [2021-06-05 22:37:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8590 states and 38286 transitions. [2021-06-05 22:37:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:03,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:03,005 INFO L554 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] [2021-06-05 22:37:03,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:03,206 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1467202898, now seen corresponding path program 147 times [2021-06-05 22:37:03,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:03,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561851069] [2021-06-05 22:37:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:03,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561851069] [2021-06-05 22:37:03,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561851069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203575263] [2021-06-05 22:37:03,384 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 [2021-06-05 22:37:03,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:03,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:03,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:03,626 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 [2021-06-05 22:37:03,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:03,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:37:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203575263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:03,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:37:03,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182857440] [2021-06-05 22:37:03,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:37:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:03,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:37:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:37:03,746 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) [2021-06-05 22:37:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:04,998 INFO L93 Difference]: Finished difference Result 9586 states and 42262 transitions. [2021-06-05 22:37:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:37:04,999 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 [2021-06-05 22:37:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:05,021 INFO L225 Difference]: With dead ends: 9586 [2021-06-05 22:37:05,021 INFO L226 Difference]: Without dead ends: 9540 [2021-06-05 22:37:05,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 972.3ms TimeCoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:37:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9540 states. [2021-06-05 22:37:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 8590. [2021-06-05 22:37:05,137 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) [2021-06-05 22:37:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8590 states to 8590 states and 38284 transitions. [2021-06-05 22:37:05,160 INFO L78 Accepts]: Start accepts. Automaton has 8590 states and 38284 transitions. Word has length 33 [2021-06-05 22:37:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:05,160 INFO L482 AbstractCegarLoop]: Abstraction has 8590 states and 38284 transitions. [2021-06-05 22:37:05,160 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) [2021-06-05 22:37:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8590 states and 38284 transitions. [2021-06-05 22:37:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:05,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:05,174 INFO L554 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] [2021-06-05 22:37:05,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 22:37:05,374 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1933910820, now seen corresponding path program 148 times [2021-06-05 22:37:05,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:05,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452429551] [2021-06-05 22:37:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:05,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:05,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452429551] [2021-06-05 22:37:05,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452429551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:05,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748283849] [2021-06-05 22:37:05,563 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 [2021-06-05 22:37:05,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:05,771 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 [2021-06-05 22:37:05,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:05,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:05,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:05,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:37:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748283849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:05,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:05,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:37:05,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428549944] [2021-06-05 22:37:05,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:05,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:05,850 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) [2021-06-05 22:37:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:07,395 INFO L93 Difference]: Finished difference Result 9769 states and 42998 transitions. [2021-06-05 22:37:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:37:07,395 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 [2021-06-05 22:37:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:07,417 INFO L225 Difference]: With dead ends: 9769 [2021-06-05 22:37:07,417 INFO L226 Difference]: Without dead ends: 9678 [2021-06-05 22:37:07,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1269.5ms TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:37:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9678 states. [2021-06-05 22:37:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9678 to 8599. [2021-06-05 22:37:07,546 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) [2021-06-05 22:37:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8599 states to 8599 states and 38345 transitions. [2021-06-05 22:37:07,570 INFO L78 Accepts]: Start accepts. Automaton has 8599 states and 38345 transitions. Word has length 33 [2021-06-05 22:37:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:07,570 INFO L482 AbstractCegarLoop]: Abstraction has 8599 states and 38345 transitions. [2021-06-05 22:37:07,570 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) [2021-06-05 22:37:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 8599 states and 38345 transitions. [2021-06-05 22:37:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:07,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:07,584 INFO L554 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] [2021-06-05 22:37:07,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:07,784 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1647132526, now seen corresponding path program 149 times [2021-06-05 22:37:07,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:07,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860594590] [2021-06-05 22:37:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:07,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:07,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860594590] [2021-06-05 22:37:07,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860594590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:07,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321833847] [2021-06-05 22:37:07,963 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 [2021-06-05 22:37:08,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:08,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:08,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:08,203 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 [2021-06-05 22:37:08,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:08,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-05 22:37:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:08,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321833847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:08,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:08,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:08,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649815808] [2021-06-05 22:37:08,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:08,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:08,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:08,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:08,293 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) [2021-06-05 22:37:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:09,603 INFO L93 Difference]: Finished difference Result 9440 states and 41807 transitions. [2021-06-05 22:37:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:37:09,603 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 [2021-06-05 22:37:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:09,625 INFO L225 Difference]: With dead ends: 9440 [2021-06-05 22:37:09,625 INFO L226 Difference]: Without dead ends: 9425 [2021-06-05 22:37:09,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 925.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:37:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9425 states. [2021-06-05 22:37:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9425 to 8623. [2021-06-05 22:37:09,749 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) [2021-06-05 22:37:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8623 states to 8623 states and 38463 transitions. [2021-06-05 22:37:09,772 INFO L78 Accepts]: Start accepts. Automaton has 8623 states and 38463 transitions. Word has length 33 [2021-06-05 22:37:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:09,772 INFO L482 AbstractCegarLoop]: Abstraction has 8623 states and 38463 transitions. [2021-06-05 22:37:09,772 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) [2021-06-05 22:37:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 8623 states and 38463 transitions. [2021-06-05 22:37:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:09,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:09,786 INFO L554 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] [2021-06-05 22:37:09,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 22:37:09,986 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:09,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1213103180, now seen corresponding path program 150 times [2021-06-05 22:37:09,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:09,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581185014] [2021-06-05 22:37:09,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:10,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:10,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581185014] [2021-06-05 22:37:10,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581185014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:10,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681377129] [2021-06-05 22:37:10,201 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 [2021-06-05 22:37:10,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:10,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:10,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:37:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:10,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:10,504 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:10,504 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 [2021-06-05 22:37:10,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:37:10,540 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-05 22:37:10,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:10,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:37:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681377129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:10,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:10,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:37:10,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158780076] [2021-06-05 22:37:10,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:37:10,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:10,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:37:10,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:37:10,669 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) [2021-06-05 22:37:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:12,348 INFO L93 Difference]: Finished difference Result 9476 states and 41882 transitions. [2021-06-05 22:37:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:37:12,348 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 [2021-06-05 22:37:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:12,370 INFO L225 Difference]: With dead ends: 9476 [2021-06-05 22:37:12,370 INFO L226 Difference]: Without dead ends: 9447 [2021-06-05 22:37:12,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1289.4ms TimeCoverageRelationStatistics Valid=217, Invalid=2233, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:37:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2021-06-05 22:37:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 8647. [2021-06-05 22:37:12,491 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) [2021-06-05 22:37:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8647 states to 8647 states and 38581 transitions. [2021-06-05 22:37:12,513 INFO L78 Accepts]: Start accepts. Automaton has 8647 states and 38581 transitions. Word has length 33 [2021-06-05 22:37:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:12,513 INFO L482 AbstractCegarLoop]: Abstraction has 8647 states and 38581 transitions. [2021-06-05 22:37:12,513 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) [2021-06-05 22:37:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8647 states and 38581 transitions. [2021-06-05 22:37:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:12,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:12,527 INFO L554 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] [2021-06-05 22:37:12,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:12,728 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1566242670, now seen corresponding path program 151 times [2021-06-05 22:37:12,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:12,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959431602] [2021-06-05 22:37:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:12,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:12,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959431602] [2021-06-05 22:37:12,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959431602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:12,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297292130] [2021-06-05 22:37:12,911 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 [2021-06-05 22:37:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:13,111 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 [2021-06-05 22:37:13,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:13,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:13,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:13,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:37:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:13,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297292130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:13,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:13,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:13,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087026119] [2021-06-05 22:37:13,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:13,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:13,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:13,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:13,195 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) [2021-06-05 22:37:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:14,702 INFO L93 Difference]: Finished difference Result 10432 states and 45531 transitions. [2021-06-05 22:37:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:37:14,702 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 [2021-06-05 22:37:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:14,725 INFO L225 Difference]: With dead ends: 10432 [2021-06-05 22:37:14,725 INFO L226 Difference]: Without dead ends: 10402 [2021-06-05 22:37:14,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1107.7ms TimeCoverageRelationStatistics Valid=292, Invalid=2158, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:37:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2021-06-05 22:37:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 8760. [2021-06-05 22:37:14,912 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) [2021-06-05 22:37:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8760 states to 8760 states and 39103 transitions. [2021-06-05 22:37:14,935 INFO L78 Accepts]: Start accepts. Automaton has 8760 states and 39103 transitions. Word has length 33 [2021-06-05 22:37:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:14,936 INFO L482 AbstractCegarLoop]: Abstraction has 8760 states and 39103 transitions. [2021-06-05 22:37:14,936 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) [2021-06-05 22:37:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8760 states and 39103 transitions. [2021-06-05 22:37:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:14,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:14,950 INFO L554 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] [2021-06-05 22:37:15,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 22:37:15,150 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash 871489618, now seen corresponding path program 152 times [2021-06-05 22:37:15,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:15,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606933372] [2021-06-05 22:37:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:15,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:15,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606933372] [2021-06-05 22:37:15,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606933372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:15,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665102109] [2021-06-05 22:37:15,319 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 [2021-06-05 22:37:15,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:37:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:15,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 22:37:15,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:15,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:15,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:15,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-05 22:37:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:15,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665102109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:15,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:15,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 22:37:15,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793485368] [2021-06-05 22:37:15,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:15,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:15,712 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) [2021-06-05 22:37:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:16,508 INFO L93 Difference]: Finished difference Result 9572 states and 42374 transitions. [2021-06-05 22:37:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:37:16,508 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 [2021-06-05 22:37:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:16,530 INFO L225 Difference]: With dead ends: 9572 [2021-06-05 22:37:16,530 INFO L226 Difference]: Without dead ends: 9558 [2021-06-05 22:37:16,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 770.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:37:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9558 states. [2021-06-05 22:37:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9558 to 8754. [2021-06-05 22:37:16,653 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) [2021-06-05 22:37:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8754 states to 8754 states and 39082 transitions. [2021-06-05 22:37:16,678 INFO L78 Accepts]: Start accepts. Automaton has 8754 states and 39082 transitions. Word has length 33 [2021-06-05 22:37:16,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:16,678 INFO L482 AbstractCegarLoop]: Abstraction has 8754 states and 39082 transitions. [2021-06-05 22:37:16,678 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) [2021-06-05 22:37:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8754 states and 39082 transitions. [2021-06-05 22:37:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:16,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:16,693 INFO L554 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] [2021-06-05 22:37:16,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 22:37:16,894 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash 59830528, now seen corresponding path program 153 times [2021-06-05 22:37:16,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:16,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085729064] [2021-06-05 22:37:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:17,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:17,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085729064] [2021-06-05 22:37:17,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085729064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:17,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433025112] [2021-06-05 22:37:17,076 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 [2021-06-05 22:37:17,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:37:17,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:17,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:37:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:17,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:17,330 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:17,330 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 [2021-06-05 22:37:17,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:37:17,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:17,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:17,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:37:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:17,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433025112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:17,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:17,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:37:17,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353073945] [2021-06-05 22:37:17,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:37:17,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:17,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:37:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:37:17,491 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) [2021-06-05 22:37:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:19,339 INFO L93 Difference]: Finished difference Result 9704 states and 42872 transitions. [2021-06-05 22:37:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:37:19,339 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 [2021-06-05 22:37:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:19,362 INFO L225 Difference]: With dead ends: 9704 [2021-06-05 22:37:19,362 INFO L226 Difference]: Without dead ends: 9675 [2021-06-05 22:37:19,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1390.2ms TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:37:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9675 states. [2021-06-05 22:37:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9675 to 8757. [2021-06-05 22:37:19,484 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) [2021-06-05 22:37:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 39092 transitions. [2021-06-05 22:37:19,508 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 39092 transitions. Word has length 33 [2021-06-05 22:37:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:19,508 INFO L482 AbstractCegarLoop]: Abstraction has 8757 states and 39092 transitions. [2021-06-05 22:37:19,508 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) [2021-06-05 22:37:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 39092 transitions. [2021-06-05 22:37:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:19,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:19,522 INFO L554 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] [2021-06-05 22:37:19,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:19,723 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:19,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2144423326, now seen corresponding path program 154 times [2021-06-05 22:37:19,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:19,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461707692] [2021-06-05 22:37:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:19,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461707692] [2021-06-05 22:37:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461707692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575840246] [2021-06-05 22:37:19,892 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 [2021-06-05 22:37:19,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:19,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:20,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:37:20,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:20,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:20,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:20,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:37:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:20,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575840246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:20,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:20,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:20,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055012962] [2021-06-05 22:37:20,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:20,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:20,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:20,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:20,168 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) [2021-06-05 22:37:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:21,657 INFO L93 Difference]: Finished difference Result 10287 states and 45006 transitions. [2021-06-05 22:37:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:37:21,657 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 [2021-06-05 22:37:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:21,680 INFO L225 Difference]: With dead ends: 10287 [2021-06-05 22:37:21,680 INFO L226 Difference]: Without dead ends: 10242 [2021-06-05 22:37:21,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1051.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1964, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:37:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2021-06-05 22:37:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8711. [2021-06-05 22:37:21,818 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) [2021-06-05 22:37:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8711 states to 8711 states and 38917 transitions. [2021-06-05 22:37:21,841 INFO L78 Accepts]: Start accepts. Automaton has 8711 states and 38917 transitions. Word has length 33 [2021-06-05 22:37:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:21,841 INFO L482 AbstractCegarLoop]: Abstraction has 8711 states and 38917 transitions. [2021-06-05 22:37:21,841 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) [2021-06-05 22:37:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8711 states and 38917 transitions. [2021-06-05 22:37:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:21,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:21,927 INFO L554 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] [2021-06-05 22:37:22,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:22,136 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1406368906, now seen corresponding path program 155 times [2021-06-05 22:37:22,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:22,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543676131] [2021-06-05 22:37:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:22,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:22,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543676131] [2021-06-05 22:37:22,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543676131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:22,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311003657] [2021-06-05 22:37:22,322 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 [2021-06-05 22:37:22,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:22,500 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 [2021-06-05 22:37:22,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:22,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:22,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:22,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:37:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:22,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311003657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:22,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:22,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:22,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701922979] [2021-06-05 22:37:22,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:22,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:22,606 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) [2021-06-05 22:37:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:24,115 INFO L93 Difference]: Finished difference Result 9964 states and 43880 transitions. [2021-06-05 22:37:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:37:24,116 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 [2021-06-05 22:37:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:24,138 INFO L225 Difference]: With dead ends: 9964 [2021-06-05 22:37:24,139 INFO L226 Difference]: Without dead ends: 9919 [2021-06-05 22:37:24,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1258.7ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:37:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2021-06-05 22:37:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 8784. [2021-06-05 22:37:24,265 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) [2021-06-05 22:37:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 39250 transitions. [2021-06-05 22:37:24,288 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 39250 transitions. Word has length 33 [2021-06-05 22:37:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:24,288 INFO L482 AbstractCegarLoop]: Abstraction has 8784 states and 39250 transitions. [2021-06-05 22:37:24,288 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) [2021-06-05 22:37:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 39250 transitions. [2021-06-05 22:37:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:24,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:24,302 INFO L554 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] [2021-06-05 22:37:24,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:24,503 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash 678223892, now seen corresponding path program 156 times [2021-06-05 22:37:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:24,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72037864] [2021-06-05 22:37:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:24,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:24,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72037864] [2021-06-05 22:37:24,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72037864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:24,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253305329] [2021-06-05 22:37:24,675 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 [2021-06-05 22:37:24,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:24,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:24,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:24,886 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:24,886 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 [2021-06-05 22:37:24,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:24,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:24,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:24,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 22:37:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:25,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253305329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:25,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:25,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:37:25,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053951116] [2021-06-05 22:37:25,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:37:25,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:37:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:37:25,110 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) [2021-06-05 22:37:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:26,863 INFO L93 Difference]: Finished difference Result 9538 states and 42222 transitions. [2021-06-05 22:37:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:37:26,864 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 [2021-06-05 22:37:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:26,885 INFO L225 Difference]: With dead ends: 9538 [2021-06-05 22:37:26,885 INFO L226 Difference]: Without dead ends: 9524 [2021-06-05 22:37:26,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1359.8ms TimeCoverageRelationStatistics Valid=320, Invalid=2130, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:37:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2021-06-05 22:37:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 8802. [2021-06-05 22:37:27,003 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) [2021-06-05 22:37:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8802 states to 8802 states and 39337 transitions. [2021-06-05 22:37:27,027 INFO L78 Accepts]: Start accepts. Automaton has 8802 states and 39337 transitions. Word has length 33 [2021-06-05 22:37:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:27,027 INFO L482 AbstractCegarLoop]: Abstraction has 8802 states and 39337 transitions. [2021-06-05 22:37:27,027 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) [2021-06-05 22:37:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8802 states and 39337 transitions. [2021-06-05 22:37:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:27,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:27,042 INFO L554 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] [2021-06-05 22:37:27,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 22:37:27,242 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:27,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1504314774, now seen corresponding path program 157 times [2021-06-05 22:37:27,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:27,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622084137] [2021-06-05 22:37:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:27,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622084137] [2021-06-05 22:37:27,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622084137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036300170] [2021-06-05 22:37:27,414 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 [2021-06-05 22:37:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:27,573 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 [2021-06-05 22:37:27,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:27,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:27,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:27,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:37:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:27,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036300170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:27,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:27,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:27,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829237580] [2021-06-05 22:37:27,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:27,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:27,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:27,665 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) [2021-06-05 22:37:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:28,955 INFO L93 Difference]: Finished difference Result 10192 states and 44673 transitions. [2021-06-05 22:37:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:37:28,956 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 [2021-06-05 22:37:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:28,978 INFO L225 Difference]: With dead ends: 10192 [2021-06-05 22:37:28,978 INFO L226 Difference]: Without dead ends: 10147 [2021-06-05 22:37:28,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 998.6ms TimeCoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:37:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10147 states. [2021-06-05 22:37:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10147 to 8838. [2021-06-05 22:37:29,107 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) [2021-06-05 22:37:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8838 states to 8838 states and 39535 transitions. [2021-06-05 22:37:29,131 INFO L78 Accepts]: Start accepts. Automaton has 8838 states and 39535 transitions. Word has length 33 [2021-06-05 22:37:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:29,131 INFO L482 AbstractCegarLoop]: Abstraction has 8838 states and 39535 transitions. [2021-06-05 22:37:29,131 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) [2021-06-05 22:37:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 8838 states and 39535 transitions. [2021-06-05 22:37:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:29,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:29,145 INFO L554 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] [2021-06-05 22:37:29,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 22:37:29,348 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1295203308, now seen corresponding path program 158 times [2021-06-05 22:37:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724860684] [2021-06-05 22:37:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:29,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:29,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724860684] [2021-06-05 22:37:29,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724860684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:29,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428382701] [2021-06-05 22:37:29,614 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 [2021-06-05 22:37:29,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:29,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:29,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:29,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:29,774 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 [2021-06-05 22:37:29,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:29,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:29,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:29,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:37:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:30,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428382701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:30,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:30,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:37:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077143034] [2021-06-05 22:37:30,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:37:30,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:30,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:37:30,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:37:30,004 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) [2021-06-05 22:37:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:32,229 INFO L93 Difference]: Finished difference Result 9732 states and 43073 transitions. [2021-06-05 22:37:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:37:32,229 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 [2021-06-05 22:37:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:32,251 INFO L225 Difference]: With dead ends: 9732 [2021-06-05 22:37:32,251 INFO L226 Difference]: Without dead ends: 9701 [2021-06-05 22:37:32,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1851.1ms TimeCoverageRelationStatistics Valid=395, Invalid=1861, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:37:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9701 states. [2021-06-05 22:37:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9701 to 8782. [2021-06-05 22:37:32,374 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) [2021-06-05 22:37:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8782 states to 8782 states and 39292 transitions. [2021-06-05 22:37:32,397 INFO L78 Accepts]: Start accepts. Automaton has 8782 states and 39292 transitions. Word has length 33 [2021-06-05 22:37:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:32,397 INFO L482 AbstractCegarLoop]: Abstraction has 8782 states and 39292 transitions. [2021-06-05 22:37:32,397 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) [2021-06-05 22:37:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 8782 states and 39292 transitions. [2021-06-05 22:37:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:32,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:32,411 INFO L554 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] [2021-06-05 22:37:32,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 22:37:32,612 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash -532830958, now seen corresponding path program 159 times [2021-06-05 22:37:32,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:32,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007313808] [2021-06-05 22:37:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:32,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:32,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007313808] [2021-06-05 22:37:32,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007313808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:32,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452423367] [2021-06-05 22:37:32,804 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 [2021-06-05 22:37:32,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:32,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:32,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:33,018 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:33,018 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 [2021-06-05 22:37:33,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:33,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:33,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:33,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 22:37:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:33,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452423367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:33,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:33,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:37:33,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749988499] [2021-06-05 22:37:33,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:37:33,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:37:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:37:33,245 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) [2021-06-05 22:37:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:35,205 INFO L93 Difference]: Finished difference Result 9476 states and 42032 transitions. [2021-06-05 22:37:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:37:35,205 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 [2021-06-05 22:37:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:35,227 INFO L225 Difference]: With dead ends: 9476 [2021-06-05 22:37:35,227 INFO L226 Difference]: Without dead ends: 9436 [2021-06-05 22:37:35,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1504.1ms TimeCoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:37:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9436 states. [2021-06-05 22:37:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9436 to 8794. [2021-06-05 22:37:35,357 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) [2021-06-05 22:37:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8794 states to 8794 states and 39335 transitions. [2021-06-05 22:37:35,382 INFO L78 Accepts]: Start accepts. Automaton has 8794 states and 39335 transitions. Word has length 33 [2021-06-05 22:37:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:35,382 INFO L482 AbstractCegarLoop]: Abstraction has 8794 states and 39335 transitions. [2021-06-05 22:37:35,382 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) [2021-06-05 22:37:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8794 states and 39335 transitions. [2021-06-05 22:37:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:35,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:35,398 INFO L554 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] [2021-06-05 22:37:35,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:35,599 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:35,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1665745794, now seen corresponding path program 160 times [2021-06-05 22:37:35,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:35,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436988470] [2021-06-05 22:37:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:35,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:35,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436988470] [2021-06-05 22:37:35,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436988470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:35,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78009330] [2021-06-05 22:37:35,793 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 [2021-06-05 22:37:35,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:35,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:35,961 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 [2021-06-05 22:37:35,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:35,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:35,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:35,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:37:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:36,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78009330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:36,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:36,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:37:36,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529628379] [2021-06-05 22:37:36,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:36,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:36,056 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) [2021-06-05 22:37:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:37,639 INFO L93 Difference]: Finished difference Result 10032 states and 44108 transitions. [2021-06-05 22:37:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:37:37,639 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 [2021-06-05 22:37:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:37,662 INFO L225 Difference]: With dead ends: 10032 [2021-06-05 22:37:37,663 INFO L226 Difference]: Without dead ends: 9994 [2021-06-05 22:37:37,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1314.1ms TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:37:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9994 states. [2021-06-05 22:37:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9994 to 8849. [2021-06-05 22:37:37,804 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) [2021-06-05 22:37:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 39605 transitions. [2021-06-05 22:37:37,829 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 39605 transitions. Word has length 33 [2021-06-05 22:37:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:37,829 INFO L482 AbstractCegarLoop]: Abstraction has 8849 states and 39605 transitions. [2021-06-05 22:37:37,829 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) [2021-06-05 22:37:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 39605 transitions. [2021-06-05 22:37:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:37,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:37,844 INFO L554 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] [2021-06-05 22:37:38,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:38,049 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:38,049 INFO L82 PathProgramCache]: Analyzing trace with hash 796214902, now seen corresponding path program 161 times [2021-06-05 22:37:38,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:38,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15751789] [2021-06-05 22:37:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:38,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15751789] [2021-06-05 22:37:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15751789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67366535] [2021-06-05 22:37:38,220 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 [2021-06-05 22:37:38,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:38,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:38,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:38,383 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 [2021-06-05 22:37:38,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:38,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:38,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:38,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:37:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67366535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:38,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:38,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871259352] [2021-06-05 22:37:38,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:38,478 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) [2021-06-05 22:37:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:39,700 INFO L93 Difference]: Finished difference Result 9699 states and 42810 transitions. [2021-06-05 22:37:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:37:39,700 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 [2021-06-05 22:37:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:39,721 INFO L225 Difference]: With dead ends: 9699 [2021-06-05 22:37:39,722 INFO L226 Difference]: Without dead ends: 9673 [2021-06-05 22:37:39,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1041.9ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:37:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9673 states. [2021-06-05 22:37:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9673 to 8830. [2021-06-05 22:37:39,848 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) [2021-06-05 22:37:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8830 states to 8830 states and 39533 transitions. [2021-06-05 22:37:39,871 INFO L78 Accepts]: Start accepts. Automaton has 8830 states and 39533 transitions. Word has length 33 [2021-06-05 22:37:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:39,871 INFO L482 AbstractCegarLoop]: Abstraction has 8830 states and 39533 transitions. [2021-06-05 22:37:39,871 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) [2021-06-05 22:37:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8830 states and 39533 transitions. [2021-06-05 22:37:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:39,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:39,886 INFO L554 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] [2021-06-05 22:37:40,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:40,086 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash -916173328, now seen corresponding path program 162 times [2021-06-05 22:37:40,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:40,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917862457] [2021-06-05 22:37:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:40,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:40,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917862457] [2021-06-05 22:37:40,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917862457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:40,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329050599] [2021-06-05 22:37:40,333 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 [2021-06-05 22:37:40,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:40,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:40,541 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:40,541 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 [2021-06-05 22:37:40,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:40,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:40,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:40,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:37:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329050599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:40,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:40,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:37:40,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207544101] [2021-06-05 22:37:40,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:37:40,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:40,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:37:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:37:40,739 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) [2021-06-05 22:37:40,966 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-05 22:37:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:42,785 INFO L93 Difference]: Finished difference Result 10003 states and 43575 transitions. [2021-06-05 22:37:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:37:42,786 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 [2021-06-05 22:37:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:42,807 INFO L225 Difference]: With dead ends: 10003 [2021-06-05 22:37:42,807 INFO L226 Difference]: Without dead ends: 9945 [2021-06-05 22:37:42,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1922.1ms TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:37:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-06-05 22:37:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 8878. [2021-06-05 22:37:42,938 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) [2021-06-05 22:37:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 39795 transitions. [2021-06-05 22:37:42,961 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 39795 transitions. Word has length 33 [2021-06-05 22:37:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:42,961 INFO L482 AbstractCegarLoop]: Abstraction has 8878 states and 39795 transitions. [2021-06-05 22:37:42,961 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) [2021-06-05 22:37:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 39795 transitions. [2021-06-05 22:37:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:42,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:42,976 INFO L554 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] [2021-06-05 22:37:43,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 22:37:43,176 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:43,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1269312818, now seen corresponding path program 163 times [2021-06-05 22:37:43,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:43,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443105003] [2021-06-05 22:37:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:43,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:43,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443105003] [2021-06-05 22:37:43,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443105003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:43,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019004315] [2021-06-05 22:37:43,468 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 [2021-06-05 22:37:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:43,629 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 [2021-06-05 22:37:43,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:43,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:43,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:43,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:37:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019004315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867738250] [2021-06-05 22:37:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:43,731 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) [2021-06-05 22:37:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:47,074 INFO L93 Difference]: Finished difference Result 10250 states and 45150 transitions. [2021-06-05 22:37:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:37:47,074 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 [2021-06-05 22:37:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:47,097 INFO L225 Difference]: With dead ends: 10250 [2021-06-05 22:37:47,097 INFO L226 Difference]: Without dead ends: 10204 [2021-06-05 22:37:47,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2918.5ms TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:37:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10204 states. [2021-06-05 22:37:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10204 to 8945. [2021-06-05 22:37:47,227 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) [2021-06-05 22:37:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 40034 transitions. [2021-06-05 22:37:47,251 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 40034 transitions. Word has length 33 [2021-06-05 22:37:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:47,251 INFO L482 AbstractCegarLoop]: Abstraction has 8945 states and 40034 transitions. [2021-06-05 22:37:47,251 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) [2021-06-05 22:37:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 40034 transitions. [2021-06-05 22:37:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:47,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:47,265 INFO L554 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] [2021-06-05 22:37:47,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:47,466 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1168419470, now seen corresponding path program 164 times [2021-06-05 22:37:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:47,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437358326] [2021-06-05 22:37:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:47,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:47,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437358326] [2021-06-05 22:37:47,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437358326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:47,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008556884] [2021-06-05 22:37:47,714 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 [2021-06-05 22:37:47,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:47,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:37:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:47,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:47,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:47,890 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 [2021-06-05 22:37:47,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:47,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:47,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:47,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-05 22:37:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:48,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008556884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:48,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:48,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:37:48,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304504319] [2021-06-05 22:37:48,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:48,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:48,054 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) [2021-06-05 22:37:48,975 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 22:37:49,863 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 22:37:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:51,805 INFO L93 Difference]: Finished difference Result 10518 states and 45678 transitions. [2021-06-05 22:37:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:37:51,806 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 [2021-06-05 22:37:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:51,828 INFO L225 Difference]: With dead ends: 10518 [2021-06-05 22:37:51,829 INFO L226 Difference]: Without dead ends: 10427 [2021-06-05 22:37:51,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 3393.4ms TimeCoverageRelationStatistics Valid=724, Invalid=3832, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:37:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10427 states. [2021-06-05 22:37:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10427 to 8890. [2021-06-05 22:37:51,963 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) [2021-06-05 22:37:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 39816 transitions. [2021-06-05 22:37:51,987 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 39816 transitions. Word has length 33 [2021-06-05 22:37:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:51,987 INFO L482 AbstractCegarLoop]: Abstraction has 8890 states and 39816 transitions. [2021-06-05 22:37:51,987 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) [2021-06-05 22:37:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 39816 transitions. [2021-06-05 22:37:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:52,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:52,002 INFO L554 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] [2021-06-05 22:37:52,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:52,203 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash 799662860, now seen corresponding path program 165 times [2021-06-05 22:37:52,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:52,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457681171] [2021-06-05 22:37:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:52,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:52,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457681171] [2021-06-05 22:37:52,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457681171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:52,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313611774] [2021-06-05 22:37:52,460 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 [2021-06-05 22:37:52,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:37:52,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:52,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:52,619 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 [2021-06-05 22:37:52,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:52,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:52,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:52,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:37:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:52,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313611774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:52,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:52,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:37:52,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873714090] [2021-06-05 22:37:52,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:37:52,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:52,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:37:52,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:37:52,838 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) [2021-06-05 22:37:52,976 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-05 22:37:53,166 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-05 22:37:53,469 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 22:37:55,428 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-05 22:37:55,576 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 22:37:55,735 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-05 22:37:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:55,897 INFO L93 Difference]: Finished difference Result 10422 states and 45056 transitions. [2021-06-05 22:37:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:37:55,897 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 [2021-06-05 22:37:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:55,920 INFO L225 Difference]: With dead ends: 10422 [2021-06-05 22:37:55,920 INFO L226 Difference]: Without dead ends: 10394 [2021-06-05 22:37:55,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2782.7ms TimeCoverageRelationStatistics Valid=608, Invalid=2698, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:37:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-06-05 22:37:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 8969. [2021-06-05 22:37:56,072 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) [2021-06-05 22:37:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 40171 transitions. [2021-06-05 22:37:56,098 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 40171 transitions. Word has length 33 [2021-06-05 22:37:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:56,098 INFO L482 AbstractCegarLoop]: Abstraction has 8969 states and 40171 transitions. [2021-06-05 22:37:56,098 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) [2021-06-05 22:37:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 40171 transitions. [2021-06-05 22:37:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:56,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:56,113 INFO L554 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] [2021-06-05 22:37:56,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:56,314 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1209881096, now seen corresponding path program 166 times [2021-06-05 22:37:56,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:56,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196693407] [2021-06-05 22:37:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:56,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:56,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196693407] [2021-06-05 22:37:56,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196693407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:56,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566010956] [2021-06-05 22:37:56,482 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 [2021-06-05 22:37:56,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:56,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:56,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:56,642 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 [2021-06-05 22:37:56,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:56,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:56,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:56,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:37:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:56,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566010956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:56,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:56,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:56,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590047545] [2021-06-05 22:37:56,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:56,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:56,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:56,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:56,737 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) [2021-06-05 22:37:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:57,681 INFO L93 Difference]: Finished difference Result 9795 states and 43141 transitions. [2021-06-05 22:37:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:37:57,682 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 [2021-06-05 22:37:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:57,703 INFO L225 Difference]: With dead ends: 9795 [2021-06-05 22:37:57,703 INFO L226 Difference]: Without dead ends: 9769 [2021-06-05 22:37:57,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:37:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2021-06-05 22:37:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 8979. [2021-06-05 22:37:57,832 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) [2021-06-05 22:37:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8979 states to 8979 states and 40195 transitions. [2021-06-05 22:37:57,856 INFO L78 Accepts]: Start accepts. Automaton has 8979 states and 40195 transitions. Word has length 33 [2021-06-05 22:37:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:57,857 INFO L482 AbstractCegarLoop]: Abstraction has 8979 states and 40195 transitions. [2021-06-05 22:37:57,857 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) [2021-06-05 22:37:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8979 states and 40195 transitions. [2021-06-05 22:37:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:37:57,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:57,871 INFO L554 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] [2021-06-05 22:37:58,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:58,072 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash -805007730, now seen corresponding path program 167 times [2021-06-05 22:37:58,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:58,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793650752] [2021-06-05 22:37:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:58,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:58,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793650752] [2021-06-05 22:37:58,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793650752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:58,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490356317] [2021-06-05 22:37:58,256 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 [2021-06-05 22:37:58,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:58,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:58,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:37:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:58,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:37:58,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:58,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:58,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:58,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:37:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:58,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490356317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:58,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:58,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:37:58,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076266251] [2021-06-05 22:37:58,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:58,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:58,510 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) [2021-06-05 22:37:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:59,890 INFO L93 Difference]: Finished difference Result 10031 states and 44194 transitions. [2021-06-05 22:37:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:37:59,890 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 [2021-06-05 22:37:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:59,913 INFO L225 Difference]: With dead ends: 10031 [2021-06-05 22:37:59,913 INFO L226 Difference]: Without dead ends: 9921 [2021-06-05 22:37:59,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1278.6ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:37:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9921 states. [2021-06-05 22:38:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9921 to 8941. [2021-06-05 22:38:00,044 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) [2021-06-05 22:38:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8941 states to 8941 states and 40038 transitions. [2021-06-05 22:38:00,068 INFO L78 Accepts]: Start accepts. Automaton has 8941 states and 40038 transitions. Word has length 33 [2021-06-05 22:38:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:00,068 INFO L482 AbstractCegarLoop]: Abstraction has 8941 states and 40038 transitions. [2021-06-05 22:38:00,068 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) [2021-06-05 22:38:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 8941 states and 40038 transitions. [2021-06-05 22:38:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:00,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:00,083 INFO L554 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] [2021-06-05 22:38:00,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 22:38:00,284 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -42635380, now seen corresponding path program 168 times [2021-06-05 22:38:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:00,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092124794] [2021-06-05 22:38:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092124794] [2021-06-05 22:38:00,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092124794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569837938] [2021-06-05 22:38:00,476 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 [2021-06-05 22:38:00,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:00,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:00,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:00,687 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:38:00,687 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 [2021-06-05 22:38:00,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:00,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:38:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569837938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:00,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:38:00,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198537114] [2021-06-05 22:38:00,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:38:00,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:38:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:38:00,881 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) [2021-06-05 22:38:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:02,117 INFO L93 Difference]: Finished difference Result 9481 states and 42221 transitions. [2021-06-05 22:38:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:38:02,118 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 [2021-06-05 22:38:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:02,139 INFO L225 Difference]: With dead ends: 9481 [2021-06-05 22:38:02,139 INFO L226 Difference]: Without dead ends: 9429 [2021-06-05 22:38:02,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1141.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:38:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-06-05 22:38:02,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8926. [2021-06-05 22:38:02,264 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) [2021-06-05 22:38:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8926 states to 8926 states and 39989 transitions. [2021-06-05 22:38:02,289 INFO L78 Accepts]: Start accepts. Automaton has 8926 states and 39989 transitions. Word has length 33 [2021-06-05 22:38:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:02,289 INFO L482 AbstractCegarLoop]: Abstraction has 8926 states and 39989 transitions. [2021-06-05 22:38:02,289 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) [2021-06-05 22:38:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 8926 states and 39989 transitions. [2021-06-05 22:38:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:02,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:02,304 INFO L554 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] [2021-06-05 22:38:02,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 22:38:02,504 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1576766294, now seen corresponding path program 169 times [2021-06-05 22:38:02,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:02,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594131050] [2021-06-05 22:38:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:02,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:02,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594131050] [2021-06-05 22:38:02,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594131050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:02,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685825407] [2021-06-05 22:38:02,759 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 [2021-06-05 22:38:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:02,936 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 [2021-06-05 22:38:02,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:02,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:02,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:02,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:38:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:03,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685825407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:03,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:03,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557059970] [2021-06-05 22:38:03,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:03,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:03,015 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) [2021-06-05 22:38:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:05,582 INFO L93 Difference]: Finished difference Result 11007 states and 47783 transitions. [2021-06-05 22:38:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:38:05,583 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 [2021-06-05 22:38:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:05,607 INFO L225 Difference]: With dead ends: 11007 [2021-06-05 22:38:05,607 INFO L226 Difference]: Without dead ends: 10988 [2021-06-05 22:38:05,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 2208.8ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:38:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-06-05 22:38:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 9112. [2021-06-05 22:38:05,747 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) [2021-06-05 22:38:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 40795 transitions. [2021-06-05 22:38:05,771 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 40795 transitions. Word has length 33 [2021-06-05 22:38:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:05,772 INFO L482 AbstractCegarLoop]: Abstraction has 9112 states and 40795 transitions. [2021-06-05 22:38:05,772 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) [2021-06-05 22:38:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 40795 transitions. [2021-06-05 22:38:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:05,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:05,787 INFO L554 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] [2021-06-05 22:38:05,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:05,987 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -91627148, now seen corresponding path program 170 times [2021-06-05 22:38:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:05,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115863079] [2021-06-05 22:38:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:06,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:06,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115863079] [2021-06-05 22:38:06,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115863079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:06,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371602327] [2021-06-05 22:38:06,230 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 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 [2021-06-05 22:38:06,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:06,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:06,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:38:06,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:06,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:06,427 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 [2021-06-05 22:38:06,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:06,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:06,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:06,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 22:38:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:06,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371602327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:06,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:06,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:38:06,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548805513] [2021-06-05 22:38:06,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:06,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:06,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:06,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:06,569 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) [2021-06-05 22:38:06,939 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 22:38:08,108 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 22:38:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:10,684 INFO L93 Difference]: Finished difference Result 11343 states and 48522 transitions. [2021-06-05 22:38:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:38:10,685 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 [2021-06-05 22:38:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:10,709 INFO L225 Difference]: With dead ends: 11343 [2021-06-05 22:38:10,709 INFO L226 Difference]: Without dead ends: 11264 [2021-06-05 22:38:10,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 3647.5ms TimeCoverageRelationStatistics Valid=811, Invalid=4019, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:38:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2021-06-05 22:38:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 9065. [2021-06-05 22:38:10,857 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) [2021-06-05 22:38:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9065 states to 9065 states and 40608 transitions. [2021-06-05 22:38:10,880 INFO L78 Accepts]: Start accepts. Automaton has 9065 states and 40608 transitions. Word has length 33 [2021-06-05 22:38:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:10,880 INFO L482 AbstractCegarLoop]: Abstraction has 9065 states and 40608 transitions. [2021-06-05 22:38:10,880 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) [2021-06-05 22:38:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 9065 states and 40608 transitions. [2021-06-05 22:38:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:10,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:10,895 INFO L554 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] [2021-06-05 22:38:11,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-06-05 22:38:11,095 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash -933925388, now seen corresponding path program 171 times [2021-06-05 22:38:11,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:11,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341001908] [2021-06-05 22:38:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:11,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:11,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341001908] [2021-06-05 22:38:11,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341001908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:11,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563845049] [2021-06-05 22:38:11,275 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 [2021-06-05 22:38:11,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:38:11,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:38:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:11,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:11,473 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 [2021-06-05 22:38:11,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:11,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:11,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:11,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 22:38:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:11,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563845049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:11,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:11,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:38:11,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426552127] [2021-06-05 22:38:11,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:38:11,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:11,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:38:11,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:38:11,660 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) [2021-06-05 22:38:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:12,901 INFO L93 Difference]: Finished difference Result 9843 states and 43680 transitions. [2021-06-05 22:38:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:38:12,901 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 [2021-06-05 22:38:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:12,923 INFO L225 Difference]: With dead ends: 9843 [2021-06-05 22:38:12,923 INFO L226 Difference]: Without dead ends: 9803 [2021-06-05 22:38:12,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1123.0ms TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:38:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-06-05 22:38:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9062. [2021-06-05 22:38:13,097 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) [2021-06-05 22:38:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9062 states to 9062 states and 40599 transitions. [2021-06-05 22:38:13,121 INFO L78 Accepts]: Start accepts. Automaton has 9062 states and 40599 transitions. Word has length 33 [2021-06-05 22:38:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:13,121 INFO L482 AbstractCegarLoop]: Abstraction has 9062 states and 40599 transitions. [2021-06-05 22:38:13,121 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) [2021-06-05 22:38:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 9062 states and 40599 transitions. [2021-06-05 22:38:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:13,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:13,135 INFO L554 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] [2021-06-05 22:38:13,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:13,336 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1264651364, now seen corresponding path program 172 times [2021-06-05 22:38:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:13,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488793333] [2021-06-05 22:38:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:13,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:13,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488793333] [2021-06-05 22:38:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488793333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:13,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280191847] [2021-06-05 22:38:13,541 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 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 [2021-06-05 22:38:13,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:13,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:13,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:13,759 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 [2021-06-05 22:38:13,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:13,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:13,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:13,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:38:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280191847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:13,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:13,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:38:13,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675070423] [2021-06-05 22:38:13,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:13,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:13,836 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) [2021-06-05 22:38:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:15,274 INFO L93 Difference]: Finished difference Result 10409 states and 45790 transitions. [2021-06-05 22:38:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:38:15,274 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 [2021-06-05 22:38:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:15,298 INFO L225 Difference]: With dead ends: 10409 [2021-06-05 22:38:15,298 INFO L226 Difference]: Without dead ends: 10327 [2021-06-05 22:38:15,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1237.7ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:38:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10327 states. [2021-06-05 22:38:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10327 to 9047. [2021-06-05 22:38:15,435 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) [2021-06-05 22:38:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9047 states to 9047 states and 40538 transitions. [2021-06-05 22:38:15,459 INFO L78 Accepts]: Start accepts. Automaton has 9047 states and 40538 transitions. Word has length 33 [2021-06-05 22:38:15,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:15,460 INFO L482 AbstractCegarLoop]: Abstraction has 9047 states and 40538 transitions. [2021-06-05 22:38:15,460 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) [2021-06-05 22:38:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 9047 states and 40538 transitions. [2021-06-05 22:38:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:15,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:15,474 INFO L554 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] [2021-06-05 22:38:15,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:15,675 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:15,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:15,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1690605646, now seen corresponding path program 173 times [2021-06-05 22:38:15,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:15,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353490301] [2021-06-05 22:38:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:15,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:15,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353490301] [2021-06-05 22:38:15,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353490301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:15,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508382813] [2021-06-05 22:38:15,856 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 [2021-06-05 22:38:15,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:15,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:16,082 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 [2021-06-05 22:38:16,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:16,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:16,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:16,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:38:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:16,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508382813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:16,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:16,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:38:16,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435866917] [2021-06-05 22:38:16,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:16,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:16,138 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) [2021-06-05 22:38:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:17,662 INFO L93 Difference]: Finished difference Result 9854 states and 43784 transitions. [2021-06-05 22:38:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:38:17,663 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 [2021-06-05 22:38:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:17,685 INFO L225 Difference]: With dead ends: 9854 [2021-06-05 22:38:17,685 INFO L226 Difference]: Without dead ends: 9800 [2021-06-05 22:38:17,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1177.6ms TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:38:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9800 states. [2021-06-05 22:38:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9800 to 9032. [2021-06-05 22:38:17,812 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) [2021-06-05 22:38:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 40482 transitions. [2021-06-05 22:38:17,837 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 40482 transitions. Word has length 33 [2021-06-05 22:38:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:17,837 INFO L482 AbstractCegarLoop]: Abstraction has 9032 states and 40482 transitions. [2021-06-05 22:38:17,837 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) [2021-06-05 22:38:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 40482 transitions. [2021-06-05 22:38:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:17,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:17,852 INFO L554 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] [2021-06-05 22:38:18,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:18,053 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:18,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1242387220, now seen corresponding path program 174 times [2021-06-05 22:38:18,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:18,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174822448] [2021-06-05 22:38:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:18,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:18,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174822448] [2021-06-05 22:38:18,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174822448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:18,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056289809] [2021-06-05 22:38:18,289 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 [2021-06-05 22:38:18,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:38:18,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:18,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:18,478 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 [2021-06-05 22:38:18,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:18,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:18,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:18,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:38:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:18,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056289809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:18,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:18,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:38:18,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555463304] [2021-06-05 22:38:18,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:38:18,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:18,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:38:18,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:38:18,714 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) [2021-06-05 22:38:18,940 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-06-05 22:38:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:21,367 INFO L93 Difference]: Finished difference Result 10361 states and 45040 transitions. [2021-06-05 22:38:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:38:21,367 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 [2021-06-05 22:38:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:21,390 INFO L225 Difference]: With dead ends: 10361 [2021-06-05 22:38:21,390 INFO L226 Difference]: Without dead ends: 10332 [2021-06-05 22:38:21,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2201.0ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:38:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10332 states. [2021-06-05 22:38:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10332 to 9071. [2021-06-05 22:38:21,523 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) [2021-06-05 22:38:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9071 states to 9071 states and 40675 transitions. [2021-06-05 22:38:21,547 INFO L78 Accepts]: Start accepts. Automaton has 9071 states and 40675 transitions. Word has length 33 [2021-06-05 22:38:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:21,547 INFO L482 AbstractCegarLoop]: Abstraction has 9071 states and 40675 transitions. [2021-06-05 22:38:21,547 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) [2021-06-05 22:38:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9071 states and 40675 transitions. [2021-06-05 22:38:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:21,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:21,563 INFO L554 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] [2021-06-05 22:38:21,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 22:38:21,764 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 889247730, now seen corresponding path program 175 times [2021-06-05 22:38:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:21,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936553464] [2021-06-05 22:38:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:22,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:22,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936553464] [2021-06-05 22:38:22,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936553464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:22,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112820374] [2021-06-05 22:38:22,007 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 [2021-06-05 22:38:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:22,178 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 [2021-06-05 22:38:22,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:22,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:22,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:22,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:38:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:22,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112820374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:22,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:22,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:22,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571088068] [2021-06-05 22:38:22,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:22,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:22,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:22,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:22,285 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) [2021-06-05 22:38:23,110 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-05 22:38:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:25,656 INFO L93 Difference]: Finished difference Result 10371 states and 45701 transitions. [2021-06-05 22:38:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:38:25,657 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 [2021-06-05 22:38:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:25,680 INFO L225 Difference]: With dead ends: 10371 [2021-06-05 22:38:25,680 INFO L226 Difference]: Without dead ends: 10311 [2021-06-05 22:38:25,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2918.9ms TimeCoverageRelationStatistics Valid=680, Invalid=4432, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:38:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10311 states. [2021-06-05 22:38:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10311 to 9174. [2021-06-05 22:38:25,807 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) [2021-06-05 22:38:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9174 states to 9174 states and 41115 transitions. [2021-06-05 22:38:25,831 INFO L78 Accepts]: Start accepts. Automaton has 9174 states and 41115 transitions. Word has length 33 [2021-06-05 22:38:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:25,831 INFO L482 AbstractCegarLoop]: Abstraction has 9174 states and 41115 transitions. [2021-06-05 22:38:25,831 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) [2021-06-05 22:38:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9174 states and 41115 transitions. [2021-06-05 22:38:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:25,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:25,846 INFO L554 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] [2021-06-05 22:38:26,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 22:38:26,047 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash -967987278, now seen corresponding path program 176 times [2021-06-05 22:38:26,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:26,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543879879] [2021-06-05 22:38:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:26,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:26,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543879879] [2021-06-05 22:38:26,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543879879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:26,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019937346] [2021-06-05 22:38:26,289 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 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 [2021-06-05 22:38:26,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:26,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:38:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:26,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:26,471 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 [2021-06-05 22:38:26,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:26,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:26,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:26,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:38:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:26,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019937346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:26,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:26,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:38:26,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363631125] [2021-06-05 22:38:26,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:26,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:26,633 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) [2021-06-05 22:38:27,489 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 22:38:27,617 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 22:38:28,413 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-06-05 22:38:30,095 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 22:38:30,350 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 22:38:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:30,611 INFO L93 Difference]: Finished difference Result 10950 states and 47314 transitions. [2021-06-05 22:38:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:38:30,612 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 [2021-06-05 22:38:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:30,635 INFO L225 Difference]: With dead ends: 10950 [2021-06-05 22:38:30,635 INFO L226 Difference]: Without dead ends: 10852 [2021-06-05 22:38:30,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 3536.2ms TimeCoverageRelationStatistics Valid=689, Invalid=4281, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:38:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10852 states. [2021-06-05 22:38:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10852 to 9119. [2021-06-05 22:38:30,776 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) [2021-06-05 22:38:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9119 states to 9119 states and 40897 transitions. [2021-06-05 22:38:30,801 INFO L78 Accepts]: Start accepts. Automaton has 9119 states and 40897 transitions. Word has length 33 [2021-06-05 22:38:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:30,801 INFO L482 AbstractCegarLoop]: Abstraction has 9119 states and 40897 transitions. [2021-06-05 22:38:30,801 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) [2021-06-05 22:38:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9119 states and 40897 transitions. [2021-06-05 22:38:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:30,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:30,816 INFO L554 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] [2021-06-05 22:38:31,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 22:38:31,017 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash 520491120, now seen corresponding path program 177 times [2021-06-05 22:38:31,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:31,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749299425] [2021-06-05 22:38:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:31,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:31,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749299425] [2021-06-05 22:38:31,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749299425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:31,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101894574] [2021-06-05 22:38:31,273 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 [2021-06-05 22:38:31,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:38:31,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:31,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:31,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:31,442 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 [2021-06-05 22:38:31,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:31,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:38:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:31,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101894574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:31,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:31,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:38:31,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180395544] [2021-06-05 22:38:31,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:38:31,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:31,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:38:31,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:38:31,699 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) [2021-06-05 22:38:31,846 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2021-06-05 22:38:32,025 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-05 22:38:34,488 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 22:38:34,647 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 22:38:34,799 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 22:38:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:35,068 INFO L93 Difference]: Finished difference Result 10184 states and 44882 transitions. [2021-06-05 22:38:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:38:35,068 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 [2021-06-05 22:38:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:35,091 INFO L225 Difference]: With dead ends: 10184 [2021-06-05 22:38:35,091 INFO L226 Difference]: Without dead ends: 10138 [2021-06-05 22:38:35,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3065.5ms TimeCoverageRelationStatistics Valid=567, Invalid=3465, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:38:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2021-06-05 22:38:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 9225. [2021-06-05 22:38:35,230 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) [2021-06-05 22:38:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9225 states to 9225 states and 41400 transitions. [2021-06-05 22:38:35,255 INFO L78 Accepts]: Start accepts. Automaton has 9225 states and 41400 transitions. Word has length 33 [2021-06-05 22:38:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:35,255 INFO L482 AbstractCegarLoop]: Abstraction has 9225 states and 41400 transitions. [2021-06-05 22:38:35,255 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) [2021-06-05 22:38:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 9225 states and 41400 transitions. [2021-06-05 22:38:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:35,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:35,270 INFO L554 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] [2021-06-05 22:38:35,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:35,470 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 331649554, now seen corresponding path program 178 times [2021-06-05 22:38:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:35,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891888155] [2021-06-05 22:38:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:35,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:35,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891888155] [2021-06-05 22:38:35,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891888155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:35,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88568428] [2021-06-05 22:38:35,733 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 [2021-06-05 22:38:35,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:35,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:35,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:35,892 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 [2021-06-05 22:38:35,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:35,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:38:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:35,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88568428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:35,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:35,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:35,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798070817] [2021-06-05 22:38:35,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:35,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:35,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:35,991 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) [2021-06-05 22:38:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:38,352 INFO L93 Difference]: Finished difference Result 10256 states and 45233 transitions. [2021-06-05 22:38:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:38:38,352 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 [2021-06-05 22:38:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:38,375 INFO L225 Difference]: With dead ends: 10256 [2021-06-05 22:38:38,375 INFO L226 Difference]: Without dead ends: 10238 [2021-06-05 22:38:38,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 2102.9ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:38:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10238 states. [2021-06-05 22:38:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10238 to 9192. [2021-06-05 22:38:38,513 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) [2021-06-05 22:38:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9192 states to 9192 states and 41211 transitions. [2021-06-05 22:38:38,537 INFO L78 Accepts]: Start accepts. Automaton has 9192 states and 41211 transitions. Word has length 33 [2021-06-05 22:38:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:38,537 INFO L482 AbstractCegarLoop]: Abstraction has 9192 states and 41211 transitions. [2021-06-05 22:38:38,537 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) [2021-06-05 22:38:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 9192 states and 41211 transitions. [2021-06-05 22:38:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:38,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:38,552 INFO L554 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] [2021-06-05 22:38:38,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:38,752 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1336743888, now seen corresponding path program 179 times [2021-06-05 22:38:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:38,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64037629] [2021-06-05 22:38:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:39,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:39,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64037629] [2021-06-05 22:38:39,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64037629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:39,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876411135] [2021-06-05 22:38:39,004 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 [2021-06-05 22:38:39,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:38:39,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:38:39,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:39,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:39,175 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 [2021-06-05 22:38:39,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:39,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:23 [2021-06-05 22:38:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:39,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876411135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:39,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:39,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:38:39,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822334174] [2021-06-05 22:38:39,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:38:39,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:39,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:38:39,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:38:39,319 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) [2021-06-05 22:38:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:41,719 INFO L93 Difference]: Finished difference Result 11304 states and 48756 transitions. [2021-06-05 22:38:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:38:41,720 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 [2021-06-05 22:38:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:41,745 INFO L225 Difference]: With dead ends: 11304 [2021-06-05 22:38:41,745 INFO L226 Difference]: Without dead ends: 11179 [2021-06-05 22:38:41,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2107.2ms TimeCoverageRelationStatistics Valid=593, Invalid=2713, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:38:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-06-05 22:38:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 9143. [2021-06-05 22:38:41,890 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) [2021-06-05 22:38:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9143 states to 9143 states and 40991 transitions. [2021-06-05 22:38:41,915 INFO L78 Accepts]: Start accepts. Automaton has 9143 states and 40991 transitions. Word has length 33 [2021-06-05 22:38:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:41,915 INFO L482 AbstractCegarLoop]: Abstraction has 9143 states and 40991 transitions. [2021-06-05 22:38:41,915 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) [2021-06-05 22:38:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9143 states and 40991 transitions. [2021-06-05 22:38:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:41,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:41,930 INFO L554 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] [2021-06-05 22:38:42,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:42,133 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2115925168, now seen corresponding path program 180 times [2021-06-05 22:38:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:42,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683365843] [2021-06-05 22:38:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:42,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:42,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683365843] [2021-06-05 22:38:42,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683365843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:42,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451322505] [2021-06-05 22:38:42,318 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 [2021-06-05 22:38:42,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:42,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:42,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:42,539 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:38:42,539 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 [2021-06-05 22:38:42,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:42,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:42,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:42,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:38:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:42,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451322505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:42,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:42,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:38:42,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119383480] [2021-06-05 22:38:42,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:38:42,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:38:42,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:38:42,737 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) [2021-06-05 22:38:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:44,281 INFO L93 Difference]: Finished difference Result 9578 states and 42712 transitions. [2021-06-05 22:38:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:38:44,281 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 [2021-06-05 22:38:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:44,303 INFO L225 Difference]: With dead ends: 9578 [2021-06-05 22:38:44,303 INFO L226 Difference]: Without dead ends: 9526 [2021-06-05 22:38:44,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1246.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:38:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2021-06-05 22:38:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 9119. [2021-06-05 22:38:44,423 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) [2021-06-05 22:38:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9119 states to 9119 states and 40897 transitions. [2021-06-05 22:38:44,447 INFO L78 Accepts]: Start accepts. Automaton has 9119 states and 40897 transitions. Word has length 33 [2021-06-05 22:38:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:44,447 INFO L482 AbstractCegarLoop]: Abstraction has 9119 states and 40897 transitions. [2021-06-05 22:38:44,447 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) [2021-06-05 22:38:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 9119 states and 40897 transitions. [2021-06-05 22:38:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:44,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:44,462 INFO L554 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] [2021-06-05 22:38:44,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 22:38:44,662 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:44,663 INFO L82 PathProgramCache]: Analyzing trace with hash -370798888, now seen corresponding path program 181 times [2021-06-05 22:38:44,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:44,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896266050] [2021-06-05 22:38:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:44,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:44,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896266050] [2021-06-05 22:38:44,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896266050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:44,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919383533] [2021-06-05 22:38:44,988 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 [2021-06-05 22:38:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:45,182 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 [2021-06-05 22:38:45,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:45,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:38:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:45,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919383533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:45,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:45,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:45,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730098669] [2021-06-05 22:38:45,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:45,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:45,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:45,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:45,265 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) [2021-06-05 22:38:46,455 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 22:38:46,757 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 22:38:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:48,469 INFO L93 Difference]: Finished difference Result 11023 states and 48354 transitions. [2021-06-05 22:38:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:38:48,469 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 [2021-06-05 22:38:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:48,494 INFO L225 Difference]: With dead ends: 11023 [2021-06-05 22:38:48,495 INFO L226 Difference]: Without dead ends: 10977 [2021-06-05 22:38:48,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2846.9ms TimeCoverageRelationStatistics Valid=664, Invalid=4028, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:38:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2021-06-05 22:38:48,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 9316. [2021-06-05 22:38:48,642 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) [2021-06-05 22:38:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9316 states to 9316 states and 41786 transitions. [2021-06-05 22:38:48,766 INFO L78 Accepts]: Start accepts. Automaton has 9316 states and 41786 transitions. Word has length 33 [2021-06-05 22:38:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:48,766 INFO L482 AbstractCegarLoop]: Abstraction has 9316 states and 41786 transitions. [2021-06-05 22:38:48,766 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) [2021-06-05 22:38:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 9316 states and 41786 transitions. [2021-06-05 22:38:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:48,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:48,782 INFO L554 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] [2021-06-05 22:38:48,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:48,982 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:48,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2066933400, now seen corresponding path program 182 times [2021-06-05 22:38:48,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:48,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273419501] [2021-06-05 22:38:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:49,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:49,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273419501] [2021-06-05 22:38:49,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273419501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:49,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085823423] [2021-06-05 22:38:49,217 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 [2021-06-05 22:38:49,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:49,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:38:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:49,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:49,431 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 [2021-06-05 22:38:49,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:49,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:49,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:49,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 22:38:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:49,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085823423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:49,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:49,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:38:49,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82132156] [2021-06-05 22:38:49,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:49,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:49,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:49,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:49,564 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) [2021-06-05 22:38:49,953 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 22:38:50,804 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 22:38:51,253 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 22:38:52,047 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 22:38:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:53,697 INFO L93 Difference]: Finished difference Result 11461 states and 49407 transitions. [2021-06-05 22:38:53,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:38:53,697 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 [2021-06-05 22:38:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:53,721 INFO L225 Difference]: With dead ends: 11461 [2021-06-05 22:38:53,721 INFO L226 Difference]: Without dead ends: 11382 [2021-06-05 22:38:53,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 3646.5ms TimeCoverageRelationStatistics Valid=727, Invalid=4103, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:38:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2021-06-05 22:38:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 9276. [2021-06-05 22:38:53,862 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) [2021-06-05 22:38:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9276 states to 9276 states and 41617 transitions. [2021-06-05 22:38:53,887 INFO L78 Accepts]: Start accepts. Automaton has 9276 states and 41617 transitions. Word has length 33 [2021-06-05 22:38:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:53,887 INFO L482 AbstractCegarLoop]: Abstraction has 9276 states and 41617 transitions. [2021-06-05 22:38:53,887 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) [2021-06-05 22:38:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9276 states and 41617 transitions. [2021-06-05 22:38:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:53,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:53,902 INFO L554 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] [2021-06-05 22:38:54,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 22:38:54,104 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1224635160, now seen corresponding path program 183 times [2021-06-05 22:38:54,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:54,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218823459] [2021-06-05 22:38:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:54,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:54,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218823459] [2021-06-05 22:38:54,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218823459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:54,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046509278] [2021-06-05 22:38:54,284 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 [2021-06-05 22:38:54,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:38:54,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:38:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:54,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:54,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:54,496 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 [2021-06-05 22:38:54,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:54,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:54,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:54,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 22:38:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:54,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046509278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:54,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:54,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:38:54,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713816680] [2021-06-05 22:38:54,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:38:54,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:54,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:38:54,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:38:54,663 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) [2021-06-05 22:38:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:56,205 INFO L93 Difference]: Finished difference Result 9795 states and 43591 transitions. [2021-06-05 22:38:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:38:56,205 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 [2021-06-05 22:38:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:56,227 INFO L225 Difference]: With dead ends: 9795 [2021-06-05 22:38:56,227 INFO L226 Difference]: Without dead ends: 9755 [2021-06-05 22:38:56,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1138.3ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:38:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2021-06-05 22:38:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 9279. [2021-06-05 22:38:56,360 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) [2021-06-05 22:38:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 41623 transitions. [2021-06-05 22:38:56,386 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 41623 transitions. Word has length 33 [2021-06-05 22:38:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:56,386 INFO L482 AbstractCegarLoop]: Abstraction has 9279 states and 41623 transitions. [2021-06-05 22:38:56,386 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) [2021-06-05 22:38:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 41623 transitions. [2021-06-05 22:38:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:56,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:56,401 INFO L554 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] [2021-06-05 22:38:56,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 22:38:56,605 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash -871755384, now seen corresponding path program 184 times [2021-06-05 22:38:56,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:56,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230544755] [2021-06-05 22:38:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:56,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230544755] [2021-06-05 22:38:56,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230544755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541876869] [2021-06-05 22:38:56,782 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 [2021-06-05 22:38:56,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:56,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:56,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:56,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:57,053 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 28 treesize of output 12 [2021-06-05 22:38:57,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:57,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:57,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:57,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:38:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:57,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541876869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:57,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:57,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:38:57,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205163363] [2021-06-05 22:38:57,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:57,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:57,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:57,132 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) [2021-06-05 22:38:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:58,905 INFO L93 Difference]: Finished difference Result 10594 states and 46680 transitions. [2021-06-05 22:38:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:38:58,905 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 [2021-06-05 22:38:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:58,928 INFO L225 Difference]: With dead ends: 10594 [2021-06-05 22:38:58,929 INFO L226 Difference]: Without dead ends: 10512 [2021-06-05 22:38:58,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1461.6ms TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:38:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10512 states. [2021-06-05 22:38:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10512 to 9274. [2021-06-05 22:38:59,066 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) [2021-06-05 22:38:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 41583 transitions. [2021-06-05 22:38:59,091 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 41583 transitions. Word has length 33 [2021-06-05 22:38:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:59,091 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 41583 transitions. [2021-06-05 22:38:59,091 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) [2021-06-05 22:38:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 41583 transitions. [2021-06-05 22:38:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:38:59,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:59,106 INFO L554 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] [2021-06-05 22:38:59,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-06-05 22:38:59,307 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash -445801102, now seen corresponding path program 185 times [2021-06-05 22:38:59,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:59,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141940496] [2021-06-05 22:38:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:59,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:59,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141940496] [2021-06-05 22:38:59,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141940496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:59,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461101015] [2021-06-05 22:38:59,488 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 [2021-06-05 22:38:59,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:59,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:38:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:59,729 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 [2021-06-05 22:38:59,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:59,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:38:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:59,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461101015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:59,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:59,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:38:59,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484533182] [2021-06-05 22:38:59,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:59,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:59,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:59,787 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) [2021-06-05 22:39:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:01,376 INFO L93 Difference]: Finished difference Result 9901 states and 44045 transitions. [2021-06-05 22:39:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:39:01,377 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 [2021-06-05 22:39:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:01,399 INFO L225 Difference]: With dead ends: 9901 [2021-06-05 22:39:01,399 INFO L226 Difference]: Without dead ends: 9855 [2021-06-05 22:39:01,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1348.5ms TimeCoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:39:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-06-05 22:39:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9274. [2021-06-05 22:39:01,527 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) [2021-06-05 22:39:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 41581 transitions. [2021-06-05 22:39:01,552 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 41581 transitions. Word has length 33 [2021-06-05 22:39:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:01,552 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 41581 transitions. [2021-06-05 22:39:01,552 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) [2021-06-05 22:39:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 41581 transitions. [2021-06-05 22:39:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:01,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:01,567 INFO L554 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] [2021-06-05 22:39:01,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:01,767 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash -912509024, now seen corresponding path program 186 times [2021-06-05 22:39:01,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:01,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548891320] [2021-06-05 22:39:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:01,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:01,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548891320] [2021-06-05 22:39:01,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548891320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:01,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313960870] [2021-06-05 22:39:01,945 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 [2021-06-05 22:39:01,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:01,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:01,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:01,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:02,229 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:39:02,229 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 [2021-06-05 22:39:02,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:39:02,262 INFO L628 ElimStorePlain]: treesize reduction 86, result has 20.4 percent of original size [2021-06-05 22:39:02,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:02,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:39:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313960870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:02,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:39:02,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491020415] [2021-06-05 22:39:02,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:39:02,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:02,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:39:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:02,381 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) [2021-06-05 22:39:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:03,883 INFO L93 Difference]: Finished difference Result 9864 states and 43800 transitions. [2021-06-05 22:39:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:39:03,884 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 [2021-06-05 22:39:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:03,906 INFO L225 Difference]: With dead ends: 9864 [2021-06-05 22:39:03,906 INFO L226 Difference]: Without dead ends: 9813 [2021-06-05 22:39:03,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1191.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:39:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9813 states. [2021-06-05 22:39:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9813 to 9256. [2021-06-05 22:39:04,041 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) [2021-06-05 22:39:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9256 states to 9256 states and 41518 transitions. [2021-06-05 22:39:04,067 INFO L78 Accepts]: Start accepts. Automaton has 9256 states and 41518 transitions. Word has length 33 [2021-06-05 22:39:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:04,067 INFO L482 AbstractCegarLoop]: Abstraction has 9256 states and 41518 transitions. [2021-06-05 22:39:04,067 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) [2021-06-05 22:39:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 9256 states and 41518 transitions. [2021-06-05 22:39:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:04,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:04,083 INFO L554 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] [2021-06-05 22:39:04,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 22:39:04,284 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash 119396690, now seen corresponding path program 187 times [2021-06-05 22:39:04,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:04,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234654610] [2021-06-05 22:39:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:04,480 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-06-05 22:39:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:04,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:04,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234654610] [2021-06-05 22:39:04,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234654610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:04,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167578117] [2021-06-05 22:39:04,671 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 [2021-06-05 22:39:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:04,902 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 [2021-06-05 22:39:04,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:04,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:04,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:04,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:39:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167578117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:04,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:04,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:39:04,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203927065] [2021-06-05 22:39:04,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:04,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:04,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:04,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:04,997 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) [2021-06-05 22:39:05,221 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 22:39:05,397 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 22:39:05,689 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 22:39:06,322 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 22:39:06,588 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 22:39:06,904 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 22:39:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:08,393 INFO L93 Difference]: Finished difference Result 10769 states and 47492 transitions. [2021-06-05 22:39:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:39:08,394 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 [2021-06-05 22:39:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:08,418 INFO L225 Difference]: With dead ends: 10769 [2021-06-05 22:39:08,418 INFO L226 Difference]: Without dead ends: 10746 [2021-06-05 22:39:08,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 3158.8ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:39:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10746 states. [2021-06-05 22:39:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10746 to 9377. [2021-06-05 22:39:08,626 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) [2021-06-05 22:39:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9377 states to 9377 states and 42060 transitions. [2021-06-05 22:39:08,656 INFO L78 Accepts]: Start accepts. Automaton has 9377 states and 42060 transitions. Word has length 33 [2021-06-05 22:39:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:08,656 INFO L482 AbstractCegarLoop]: Abstraction has 9377 states and 42060 transitions. [2021-06-05 22:39:08,657 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) [2021-06-05 22:39:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 9377 states and 42060 transitions. [2021-06-05 22:39:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:08,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:08,672 INFO L554 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] [2021-06-05 22:39:08,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:08,873 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1737838318, now seen corresponding path program 188 times [2021-06-05 22:39:08,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:08,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124688784] [2021-06-05 22:39:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:09,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:09,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124688784] [2021-06-05 22:39:09,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124688784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:09,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571666370] [2021-06-05 22:39:09,133 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 [2021-06-05 22:39:09,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:09,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:39:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:09,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:09,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:09,359 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 [2021-06-05 22:39:09,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:09,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:09,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:09,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 22:39:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:09,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571666370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:09,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:09,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:39:09,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927724857] [2021-06-05 22:39:09,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:09,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:09,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:09,508 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) [2021-06-05 22:39:09,733 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 22:39:09,958 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 22:39:10,789 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-05 22:39:11,155 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 22:39:11,939 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 22:39:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:13,601 INFO L93 Difference]: Finished difference Result 11473 states and 49277 transitions. [2021-06-05 22:39:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:39:13,602 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 [2021-06-05 22:39:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:13,626 INFO L225 Difference]: With dead ends: 11473 [2021-06-05 22:39:13,626 INFO L226 Difference]: Without dead ends: 11394 [2021-06-05 22:39:13,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3768.9ms TimeCoverageRelationStatistics Valid=736, Invalid=3956, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:39:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-06-05 22:39:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 9328. [2021-06-05 22:39:13,854 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) [2021-06-05 22:39:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 41843 transitions. [2021-06-05 22:39:13,877 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 41843 transitions. Word has length 33 [2021-06-05 22:39:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:13,877 INFO L482 AbstractCegarLoop]: Abstraction has 9328 states and 41843 transitions. [2021-06-05 22:39:13,877 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) [2021-06-05 22:39:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 41843 transitions. [2021-06-05 22:39:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:13,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:13,894 INFO L554 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] [2021-06-05 22:39:14,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 22:39:14,095 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1714830738, now seen corresponding path program 189 times [2021-06-05 22:39:14,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:14,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275115589] [2021-06-05 22:39:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:14,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:14,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275115589] [2021-06-05 22:39:14,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275115589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:14,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590518095] [2021-06-05 22:39:14,284 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 [2021-06-05 22:39:14,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:14,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:39:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:14,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:14,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:14,496 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 [2021-06-05 22:39:14,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:14,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:14,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:14,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 22:39:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:14,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590518095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:14,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:14,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:39:14,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914214649] [2021-06-05 22:39:14,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:39:14,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:39:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:39:14,668 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) [2021-06-05 22:39:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:16,122 INFO L93 Difference]: Finished difference Result 9773 states and 43510 transitions. [2021-06-05 22:39:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:39:16,123 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 [2021-06-05 22:39:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:16,145 INFO L225 Difference]: With dead ends: 9773 [2021-06-05 22:39:16,145 INFO L226 Difference]: Without dead ends: 9733 [2021-06-05 22:39:16,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1141.3ms TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:39:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9733 states. [2021-06-05 22:39:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9733 to 9331. [2021-06-05 22:39:16,276 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) [2021-06-05 22:39:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9331 states to 9331 states and 41849 transitions. [2021-06-05 22:39:16,301 INFO L78 Accepts]: Start accepts. Automaton has 9331 states and 41849 transitions. Word has length 33 [2021-06-05 22:39:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:16,301 INFO L482 AbstractCegarLoop]: Abstraction has 9331 states and 41849 transitions. [2021-06-05 22:39:16,301 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) [2021-06-05 22:39:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 9331 states and 41849 transitions. [2021-06-05 22:39:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:16,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:16,316 INFO L554 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] [2021-06-05 22:39:16,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 22:39:16,517 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -381559806, now seen corresponding path program 190 times [2021-06-05 22:39:16,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:16,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448798162] [2021-06-05 22:39:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:16,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:16,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448798162] [2021-06-05 22:39:16,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448798162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:16,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714393091] [2021-06-05 22:39:16,702 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 [2021-06-05 22:39:16,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:16,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:16,902 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 [2021-06-05 22:39:16,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:16,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:16,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:16,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:39:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:16,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714393091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:16,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:16,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:16,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186816530] [2021-06-05 22:39:16,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:16,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:16,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:16,982 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) [2021-06-05 22:39:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:18,685 INFO L93 Difference]: Finished difference Result 10297 states and 45729 transitions. [2021-06-05 22:39:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:39:18,694 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 [2021-06-05 22:39:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:18,717 INFO L225 Difference]: With dead ends: 10297 [2021-06-05 22:39:18,717 INFO L226 Difference]: Without dead ends: 10246 [2021-06-05 22:39:18,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1316.9ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:39:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10246 states. [2021-06-05 22:39:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10246 to 9307. [2021-06-05 22:39:18,845 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) [2021-06-05 22:39:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 41743 transitions. [2021-06-05 22:39:18,870 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 41743 transitions. Word has length 33 [2021-06-05 22:39:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:18,870 INFO L482 AbstractCegarLoop]: Abstraction has 9307 states and 41743 transitions. [2021-06-05 22:39:18,870 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) [2021-06-05 22:39:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 41743 transitions. [2021-06-05 22:39:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:18,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:18,885 INFO L554 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] [2021-06-05 22:39:19,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 22:39:19,086 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:19,086 INFO L82 PathProgramCache]: Analyzing trace with hash 44394476, now seen corresponding path program 191 times [2021-06-05 22:39:19,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:19,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971544725] [2021-06-05 22:39:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:19,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:19,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971544725] [2021-06-05 22:39:19,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971544725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:19,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239034022] [2021-06-05 22:39:19,270 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 [2021-06-05 22:39:19,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:19,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:19,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:19,507 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 [2021-06-05 22:39:19,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:19,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:19,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:19,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:39:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:19,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239034022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:19,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:19,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:19,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418518322] [2021-06-05 22:39:19,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:19,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:19,566 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) [2021-06-05 22:39:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:21,281 INFO L93 Difference]: Finished difference Result 9951 states and 44216 transitions. [2021-06-05 22:39:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:39:21,282 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 [2021-06-05 22:39:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:21,303 INFO L225 Difference]: With dead ends: 9951 [2021-06-05 22:39:21,304 INFO L226 Difference]: Without dead ends: 9890 [2021-06-05 22:39:21,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1341.9ms TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:39:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9890 states. [2021-06-05 22:39:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9890 to 9307. [2021-06-05 22:39:21,430 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) [2021-06-05 22:39:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 41741 transitions. [2021-06-05 22:39:21,454 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 41741 transitions. Word has length 33 [2021-06-05 22:39:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:21,454 INFO L482 AbstractCegarLoop]: Abstraction has 9307 states and 41741 transitions. [2021-06-05 22:39:21,454 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) [2021-06-05 22:39:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 41741 transitions. [2021-06-05 22:39:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:21,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:21,469 INFO L554 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] [2021-06-05 22:39:21,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 22:39:21,670 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash -422313446, now seen corresponding path program 192 times [2021-06-05 22:39:21,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:21,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814921250] [2021-06-05 22:39:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:21,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:21,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814921250] [2021-06-05 22:39:21,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814921250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:21,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949897553] [2021-06-05 22:39:21,855 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 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 [2021-06-05 22:39:21,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:21,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:39:21,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:22,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:22,100 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 24 treesize of output 30 [2021-06-05 22:39:22,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:22,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:22,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:22,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 22:39:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:22,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949897553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:22,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:22,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:39:22,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522432499] [2021-06-05 22:39:22,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:39:22,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:22,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:39:22,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:39:22,238 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) [2021-06-05 22:39:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:23,546 INFO L93 Difference]: Finished difference Result 9781 states and 43481 transitions. [2021-06-05 22:39:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:23,547 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 [2021-06-05 22:39:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:23,568 INFO L225 Difference]: With dead ends: 9781 [2021-06-05 22:39:23,568 INFO L226 Difference]: Without dead ends: 9730 [2021-06-05 22:39:23,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 985.0ms TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:39:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9730 states. [2021-06-05 22:39:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9730 to 9286. [2021-06-05 22:39:23,693 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) [2021-06-05 22:39:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9286 states to 9286 states and 41637 transitions. [2021-06-05 22:39:23,719 INFO L78 Accepts]: Start accepts. Automaton has 9286 states and 41637 transitions. Word has length 33 [2021-06-05 22:39:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:23,719 INFO L482 AbstractCegarLoop]: Abstraction has 9286 states and 41637 transitions. [2021-06-05 22:39:23,720 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) [2021-06-05 22:39:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9286 states and 41637 transitions. [2021-06-05 22:39:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:23,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:23,735 INFO L554 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] [2021-06-05 22:39:23,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:23,935 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:23,935 INFO L82 PathProgramCache]: Analyzing trace with hash 945184146, now seen corresponding path program 193 times [2021-06-05 22:39:23,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:23,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181358116] [2021-06-05 22:39:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:24,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:24,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181358116] [2021-06-05 22:39:24,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181358116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:24,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794887390] [2021-06-05 22:39:24,124 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 [2021-06-05 22:39:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:24,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:24,370 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 [2021-06-05 22:39:24,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:24,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:24,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:24,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:39:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:24,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794887390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:24,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:24,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:24,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884136340] [2021-06-05 22:39:24,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:24,430 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) [2021-06-05 22:39:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:25,861 INFO L93 Difference]: Finished difference Result 9716 states and 43359 transitions. [2021-06-05 22:39:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:25,862 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 [2021-06-05 22:39:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:25,883 INFO L225 Difference]: With dead ends: 9716 [2021-06-05 22:39:25,883 INFO L226 Difference]: Without dead ends: 9664 [2021-06-05 22:39:25,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1198.5ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:39:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-06-05 22:39:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 9286. [2021-06-05 22:39:26,006 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) [2021-06-05 22:39:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9286 states to 9286 states and 41635 transitions. [2021-06-05 22:39:26,031 INFO L78 Accepts]: Start accepts. Automaton has 9286 states and 41635 transitions. Word has length 33 [2021-06-05 22:39:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:26,031 INFO L482 AbstractCegarLoop]: Abstraction has 9286 states and 41635 transitions. [2021-06-05 22:39:26,031 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) [2021-06-05 22:39:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9286 states and 41635 transitions. [2021-06-05 22:39:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:26,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:26,047 INFO L554 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] [2021-06-05 22:39:26,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 22:39:26,247 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:26,247 INFO L82 PathProgramCache]: Analyzing trace with hash 186825264, now seen corresponding path program 194 times [2021-06-05 22:39:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:26,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14458341] [2021-06-05 22:39:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:26,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:26,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14458341] [2021-06-05 22:39:26,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14458341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:26,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945245786] [2021-06-05 22:39:26,433 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 [2021-06-05 22:39:26,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:26,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:26,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:26,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:26,661 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 [2021-06-05 22:39:26,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:26,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:26,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:26,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 22:39:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:26,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945245786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:26,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:26,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:39:26,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056762354] [2021-06-05 22:39:26,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:39:26,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:26,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:39:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:39:26,861 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) [2021-06-05 22:39:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:28,087 INFO L93 Difference]: Finished difference Result 9860 states and 43914 transitions. [2021-06-05 22:39:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:39:28,087 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 [2021-06-05 22:39:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:28,110 INFO L225 Difference]: With dead ends: 9860 [2021-06-05 22:39:28,110 INFO L226 Difference]: Without dead ends: 9807 [2021-06-05 22:39:28,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1105.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:39:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9807 states. [2021-06-05 22:39:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9807 to 9256. [2021-06-05 22:39:28,241 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) [2021-06-05 22:39:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9256 states to 9256 states and 41518 transitions. [2021-06-05 22:39:28,268 INFO L78 Accepts]: Start accepts. Automaton has 9256 states and 41518 transitions. Word has length 33 [2021-06-05 22:39:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:28,268 INFO L482 AbstractCegarLoop]: Abstraction has 9256 states and 41518 transitions. [2021-06-05 22:39:28,268 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) [2021-06-05 22:39:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9256 states and 41518 transitions. [2021-06-05 22:39:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:28,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:28,284 INFO L554 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] [2021-06-05 22:39:28,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 22:39:28,484 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1229275904, now seen corresponding path program 1 times [2021-06-05 22:39:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:28,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487266499] [2021-06-05 22:39:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:28,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:28,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487266499] [2021-06-05 22:39:28,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487266499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:28,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913945927] [2021-06-05 22:39:28,663 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 [2021-06-05 22:39:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:28,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:28,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:28,893 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 [2021-06-05 22:39:28,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:28,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:28,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:28,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:39:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:28,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913945927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:28,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:28,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:28,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719631989] [2021-06-05 22:39:28,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:28,967 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) [2021-06-05 22:39:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:30,342 INFO L93 Difference]: Finished difference Result 10318 states and 45839 transitions. [2021-06-05 22:39:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:39:30,342 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 [2021-06-05 22:39:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:30,365 INFO L225 Difference]: With dead ends: 10318 [2021-06-05 22:39:30,365 INFO L226 Difference]: Without dead ends: 10269 [2021-06-05 22:39:30,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1130.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:39:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10269 states. [2021-06-05 22:39:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10269 to 9329. [2021-06-05 22:39:30,501 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) [2021-06-05 22:39:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9329 states to 9329 states and 41856 transitions. [2021-06-05 22:39:30,526 INFO L78 Accepts]: Start accepts. Automaton has 9329 states and 41856 transitions. Word has length 33 [2021-06-05 22:39:30,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:30,526 INFO L482 AbstractCegarLoop]: Abstraction has 9329 states and 41856 transitions. [2021-06-05 22:39:30,526 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) [2021-06-05 22:39:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 9329 states and 41856 transitions. [2021-06-05 22:39:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:30,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:30,542 INFO L554 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] [2021-06-05 22:39:30,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:30,742 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash 994565066, now seen corresponding path program 2 times [2021-06-05 22:39:30,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:30,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624237968] [2021-06-05 22:39:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:30,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:30,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624237968] [2021-06-05 22:39:30,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624237968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:30,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385779244] [2021-06-05 22:39:30,924 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 [2021-06-05 22:39:30,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:30,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:30,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:31,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:31,182 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 [2021-06-05 22:39:31,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:31,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:31,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:31,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 22:39:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:31,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385779244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:31,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:31,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:39:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048581478] [2021-06-05 22:39:31,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:39:31,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:31,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:39:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:39:31,326 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) [2021-06-05 22:39:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:32,757 INFO L93 Difference]: Finished difference Result 10470 states and 46458 transitions. [2021-06-05 22:39:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:39:32,758 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 [2021-06-05 22:39:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:32,781 INFO L225 Difference]: With dead ends: 10470 [2021-06-05 22:39:32,781 INFO L226 Difference]: Without dead ends: 10430 [2021-06-05 22:39:32,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 986.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:39:32,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10430 states. [2021-06-05 22:39:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10430 to 9329. [2021-06-05 22:39:32,919 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) [2021-06-05 22:39:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9329 states to 9329 states and 41856 transitions. [2021-06-05 22:39:32,944 INFO L78 Accepts]: Start accepts. Automaton has 9329 states and 41856 transitions. Word has length 33 [2021-06-05 22:39:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:32,944 INFO L482 AbstractCegarLoop]: Abstraction has 9329 states and 41856 transitions. [2021-06-05 22:39:32,944 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) [2021-06-05 22:39:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9329 states and 41856 transitions. [2021-06-05 22:39:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:32,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:32,959 INFO L554 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] [2021-06-05 22:39:33,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 22:39:33,159 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:33,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:33,159 INFO L82 PathProgramCache]: Analyzing trace with hash 430967642, now seen corresponding path program 3 times [2021-06-05 22:39:33,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:33,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492663448] [2021-06-05 22:39:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:33,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:33,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492663448] [2021-06-05 22:39:33,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492663448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:33,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819873223] [2021-06-05 22:39:33,338 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 [2021-06-05 22:39:33,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:33,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:33,554 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 [2021-06-05 22:39:33,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:33,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:33,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:33,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 22:39:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:33,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819873223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:33,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:33,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:39:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056409933] [2021-06-05 22:39:33,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:39:33,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:39:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:39:33,697 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) [2021-06-05 22:39:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:35,019 INFO L93 Difference]: Finished difference Result 10488 states and 46480 transitions. [2021-06-05 22:39:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:39:35,019 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 [2021-06-05 22:39:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:35,044 INFO L225 Difference]: With dead ends: 10488 [2021-06-05 22:39:35,044 INFO L226 Difference]: Without dead ends: 10457 [2021-06-05 22:39:35,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:39:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10457 states. [2021-06-05 22:39:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10457 to 9332. [2021-06-05 22:39:35,190 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) [2021-06-05 22:39:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 41862 transitions. [2021-06-05 22:39:35,215 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 41862 transitions. Word has length 33 [2021-06-05 22:39:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:35,215 INFO L482 AbstractCegarLoop]: Abstraction has 9332 states and 41862 transitions. [2021-06-05 22:39:35,215 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) [2021-06-05 22:39:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 41862 transitions. [2021-06-05 22:39:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:35,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:35,230 INFO L554 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] [2021-06-05 22:39:35,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:35,431 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 59742636, now seen corresponding path program 4 times [2021-06-05 22:39:35,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:35,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325139765] [2021-06-05 22:39:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:35,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325139765] [2021-06-05 22:39:35,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325139765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263173583] [2021-06-05 22:39:35,608 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 [2021-06-05 22:39:35,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:35,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:35,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:35,805 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 [2021-06-05 22:39:35,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:35,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:35,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:35,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:39:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:35,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263173583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:35,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:35,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:39:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139790737] [2021-06-05 22:39:35,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:35,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:35,886 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) [2021-06-05 22:39:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:37,144 INFO L93 Difference]: Finished difference Result 10515 states and 46575 transitions. [2021-06-05 22:39:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:39:37,145 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 [2021-06-05 22:39:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:37,169 INFO L225 Difference]: With dead ends: 10515 [2021-06-05 22:39:37,169 INFO L226 Difference]: Without dead ends: 10492 [2021-06-05 22:39:37,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 895.3ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:39:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10492 states. [2021-06-05 22:39:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10492 to 9412. [2021-06-05 22:39:37,304 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) [2021-06-05 22:39:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9412 states to 9412 states and 42188 transitions. [2021-06-05 22:39:37,329 INFO L78 Accepts]: Start accepts. Automaton has 9412 states and 42188 transitions. Word has length 33 [2021-06-05 22:39:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:37,329 INFO L482 AbstractCegarLoop]: Abstraction has 9412 states and 42188 transitions. [2021-06-05 22:39:37,329 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) [2021-06-05 22:39:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9412 states and 42188 transitions. [2021-06-05 22:39:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:37,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:37,345 INFO L554 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] [2021-06-05 22:39:37,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 22:39:37,545 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1608650806, now seen corresponding path program 5 times [2021-06-05 22:39:37,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:37,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705170998] [2021-06-05 22:39:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:37,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:37,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705170998] [2021-06-05 22:39:37,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705170998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:37,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726080534] [2021-06-05 22:39:37,720 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 [2021-06-05 22:39:37,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:37,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:37,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:37,915 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 [2021-06-05 22:39:37,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:37,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:37,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:37,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:39:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:37,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726080534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:37,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:37,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847588465] [2021-06-05 22:39:37,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:37,991 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) [2021-06-05 22:39:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:39,120 INFO L93 Difference]: Finished difference Result 10523 states and 46588 transitions. [2021-06-05 22:39:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:39:39,121 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 [2021-06-05 22:39:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:39,144 INFO L225 Difference]: With dead ends: 10523 [2021-06-05 22:39:39,144 INFO L226 Difference]: Without dead ends: 10431 [2021-06-05 22:39:39,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:39:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-06-05 22:39:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9349. [2021-06-05 22:39:39,282 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) [2021-06-05 22:39:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9349 states to 9349 states and 41936 transitions. [2021-06-05 22:39:39,307 INFO L78 Accepts]: Start accepts. Automaton has 9349 states and 41936 transitions. Word has length 33 [2021-06-05 22:39:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:39,307 INFO L482 AbstractCegarLoop]: Abstraction has 9349 states and 41936 transitions. [2021-06-05 22:39:39,308 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) [2021-06-05 22:39:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 9349 states and 41936 transitions. [2021-06-05 22:39:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:39,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:39,323 INFO L554 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] [2021-06-05 22:39:39,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:39,523 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:39,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1464921280, now seen corresponding path program 6 times [2021-06-05 22:39:39,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:39,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737668902] [2021-06-05 22:39:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737668902] [2021-06-05 22:39:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737668902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753162457] [2021-06-05 22:39:39,706 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 [2021-06-05 22:39:39,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:39,950 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:39:39,950 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 [2021-06-05 22:39:39,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:39:39,980 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-05 22:39:39,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:39,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:39:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:40,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753162457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:40,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:40,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:39:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445395282] [2021-06-05 22:39:40,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:39:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:39:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:40,114 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) [2021-06-05 22:39:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:41,564 INFO L93 Difference]: Finished difference Result 10222 states and 45422 transitions. [2021-06-05 22:39:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:39:41,565 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 [2021-06-05 22:39:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:41,587 INFO L225 Difference]: With dead ends: 10222 [2021-06-05 22:39:41,588 INFO L226 Difference]: Without dead ends: 10161 [2021-06-05 22:39:41,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1156.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:39:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10161 states. [2021-06-05 22:39:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10161 to 9297. [2021-06-05 22:39:41,722 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) [2021-06-05 22:39:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 41711 transitions. [2021-06-05 22:39:41,749 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 41711 transitions. Word has length 33 [2021-06-05 22:39:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:41,749 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 41711 transitions. [2021-06-05 22:39:41,749 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) [2021-06-05 22:39:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 41711 transitions. [2021-06-05 22:39:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:41,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:41,765 INFO L554 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] [2021-06-05 22:39:41,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:41,965 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1400826684, now seen corresponding path program 7 times [2021-06-05 22:39:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:41,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351739665] [2021-06-05 22:39:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:42,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:42,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351739665] [2021-06-05 22:39:42,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351739665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:42,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115129907] [2021-06-05 22:39:42,143 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 [2021-06-05 22:39:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:42,305 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 21 treesize of output 13 [2021-06-05 22:39:42,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:42,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:42,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:42,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:39:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115129907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:42,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:42,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:39:42,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302488124] [2021-06-05 22:39:42,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:42,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:42,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:42,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:42,407 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) [2021-06-05 22:39:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:43,676 INFO L93 Difference]: Finished difference Result 10135 states and 45191 transitions. [2021-06-05 22:39:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:39:43,676 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 [2021-06-05 22:39:43,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:43,699 INFO L225 Difference]: With dead ends: 10135 [2021-06-05 22:39:43,699 INFO L226 Difference]: Without dead ends: 10106 [2021-06-05 22:39:43,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1014.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:39:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-06-05 22:39:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9318. [2021-06-05 22:39:43,825 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) [2021-06-05 22:39:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 41817 transitions. [2021-06-05 22:39:43,850 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 41817 transitions. Word has length 33 [2021-06-05 22:39:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:43,851 INFO L482 AbstractCegarLoop]: Abstraction has 9318 states and 41817 transitions. [2021-06-05 22:39:43,851 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) [2021-06-05 22:39:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 41817 transitions. [2021-06-05 22:39:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:43,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:43,866 INFO L554 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] [2021-06-05 22:39:44,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 22:39:44,066 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:44,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:44,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1047687194, now seen corresponding path program 8 times [2021-06-05 22:39:44,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:44,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162253653] [2021-06-05 22:39:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:44,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162253653] [2021-06-05 22:39:44,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162253653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863837539] [2021-06-05 22:39:44,250 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 [2021-06-05 22:39:44,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:44,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:39:44,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:44,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:44,422 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 [2021-06-05 22:39:44,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:44,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:44,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:44,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:39:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863837539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:44,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:44,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:39:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161807496] [2021-06-05 22:39:44,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:39:44,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:39:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:39:44,597 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) [2021-06-05 22:39:45,485 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 22:39:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:46,521 INFO L93 Difference]: Finished difference Result 10268 states and 45667 transitions. [2021-06-05 22:39:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:39:46,521 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 [2021-06-05 22:39:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:46,545 INFO L225 Difference]: With dead ends: 10268 [2021-06-05 22:39:46,545 INFO L226 Difference]: Without dead ends: 10245 [2021-06-05 22:39:46,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1695.2ms TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:39:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2021-06-05 22:39:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 9327. [2021-06-05 22:39:46,691 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) [2021-06-05 22:39:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 41850 transitions. [2021-06-05 22:39:46,718 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 41850 transitions. Word has length 33 [2021-06-05 22:39:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:46,718 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 41850 transitions. [2021-06-05 22:39:46,718 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) [2021-06-05 22:39:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 41850 transitions. [2021-06-05 22:39:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:46,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:46,734 INFO L554 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] [2021-06-05 22:39:46,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 22:39:46,934 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash 858845628, now seen corresponding path program 9 times [2021-06-05 22:39:46,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:46,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978384596] [2021-06-05 22:39:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:47,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978384596] [2021-06-05 22:39:47,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978384596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454132838] [2021-06-05 22:39:47,135 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 [2021-06-05 22:39:47,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:47,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:47,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:47,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:47,414 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 [2021-06-05 22:39:47,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:47,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:47,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:47,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:39:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:47,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454132838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:47,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:47,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:39:47,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138937571] [2021-06-05 22:39:47,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:39:47,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:39:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:47,605 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) [2021-06-05 22:39:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:48,995 INFO L93 Difference]: Finished difference Result 9832 states and 43850 transitions. [2021-06-05 22:39:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:48,996 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 [2021-06-05 22:39:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:49,018 INFO L225 Difference]: With dead ends: 9832 [2021-06-05 22:39:49,018 INFO L226 Difference]: Without dead ends: 9823 [2021-06-05 22:39:49,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1230.0ms TimeCoverageRelationStatistics Valid=382, Invalid=1688, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:39:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-06-05 22:39:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 9330. [2021-06-05 22:39:49,145 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) [2021-06-05 22:39:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 41856 transitions. [2021-06-05 22:39:49,170 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 41856 transitions. Word has length 33 [2021-06-05 22:39:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:49,170 INFO L482 AbstractCegarLoop]: Abstraction has 9330 states and 41856 transitions. [2021-06-05 22:39:49,171 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) [2021-06-05 22:39:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 41856 transitions. [2021-06-05 22:39:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:49,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:49,185 INFO L554 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] [2021-06-05 22:39:49,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 22:39:49,386 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -809547814, now seen corresponding path program 10 times [2021-06-05 22:39:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:49,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735058449] [2021-06-05 22:39:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:49,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735058449] [2021-06-05 22:39:49,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735058449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661080847] [2021-06-05 22:39:49,563 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 [2021-06-05 22:39:49,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:49,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:49,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:49,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:49,721 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 [2021-06-05 22:39:49,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:49,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:49,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:49,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:39:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:49,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661080847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:49,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:49,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:49,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139268563] [2021-06-05 22:39:49,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:49,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:49,812 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) [2021-06-05 22:39:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:51,026 INFO L93 Difference]: Finished difference Result 10245 states and 45535 transitions. [2021-06-05 22:39:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:39:51,026 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 [2021-06-05 22:39:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:51,049 INFO L225 Difference]: With dead ends: 10245 [2021-06-05 22:39:51,049 INFO L226 Difference]: Without dead ends: 10203 [2021-06-05 22:39:51,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1025.4ms TimeCoverageRelationStatistics Valid=347, Invalid=1545, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:39:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2021-06-05 22:39:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 9376. [2021-06-05 22:39:51,178 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) [2021-06-05 22:39:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 42055 transitions. [2021-06-05 22:39:51,203 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 42055 transitions. Word has length 33 [2021-06-05 22:39:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:51,203 INFO L482 AbstractCegarLoop]: Abstraction has 9376 states and 42055 transitions. [2021-06-05 22:39:51,203 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) [2021-06-05 22:39:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 42055 transitions. [2021-06-05 22:39:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:51,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:51,218 INFO L554 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] [2021-06-05 22:39:51,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:51,419 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1323693038, now seen corresponding path program 11 times [2021-06-05 22:39:51,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:51,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578771947] [2021-06-05 22:39:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:51,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578771947] [2021-06-05 22:39:51,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578771947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843237207] [2021-06-05 22:39:51,593 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 [2021-06-05 22:39:51,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:39:51,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:51,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:51,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:51,752 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 [2021-06-05 22:39:51,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:51,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:51,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:51,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:39:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:51,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843237207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:51,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:51,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:39:51,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615007067] [2021-06-05 22:39:51,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:51,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:51,848 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) [2021-06-05 22:39:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:52,863 INFO L93 Difference]: Finished difference Result 10267 states and 45721 transitions. [2021-06-05 22:39:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:39:52,863 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 [2021-06-05 22:39:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:52,886 INFO L225 Difference]: With dead ends: 10267 [2021-06-05 22:39:52,886 INFO L226 Difference]: Without dead ends: 10201 [2021-06-05 22:39:52,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:39:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10201 states. [2021-06-05 22:39:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10201 to 9315. [2021-06-05 22:39:53,012 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) [2021-06-05 22:39:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 41798 transitions. [2021-06-05 22:39:53,036 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 41798 transitions. Word has length 33 [2021-06-05 22:39:53,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:53,036 INFO L482 AbstractCegarLoop]: Abstraction has 9315 states and 41798 transitions. [2021-06-05 22:39:53,036 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) [2021-06-05 22:39:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 41798 transitions. [2021-06-05 22:39:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:53,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:53,051 INFO L554 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] [2021-06-05 22:39:53,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:53,252 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:53,252 INFO L82 PathProgramCache]: Analyzing trace with hash -165780716, now seen corresponding path program 12 times [2021-06-05 22:39:53,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:53,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297482665] [2021-06-05 22:39:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:53,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:53,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297482665] [2021-06-05 22:39:53,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297482665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:53,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14268135] [2021-06-05 22:39:53,451 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 [2021-06-05 22:39:53,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:53,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:53,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:53,660 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:39:53,660 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 [2021-06-05 22:39:53,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:53,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:53,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:53,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:39:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:53,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14268135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:53,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:53,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:39:53,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956471297] [2021-06-05 22:39:53,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:39:53,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:39:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:39:53,858 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) [2021-06-05 22:39:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:55,217 INFO L93 Difference]: Finished difference Result 10129 states and 45041 transitions. [2021-06-05 22:39:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:39:55,217 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 [2021-06-05 22:39:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:55,240 INFO L225 Difference]: With dead ends: 10129 [2021-06-05 22:39:55,240 INFO L226 Difference]: Without dead ends: 10106 [2021-06-05 22:39:55,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1162.2ms TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:39:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-06-05 22:39:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9336. [2021-06-05 22:39:55,371 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) [2021-06-05 22:39:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 41895 transitions. [2021-06-05 22:39:55,396 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 41895 transitions. Word has length 33 [2021-06-05 22:39:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:55,396 INFO L482 AbstractCegarLoop]: Abstraction has 9336 states and 41895 transitions. [2021-06-05 22:39:55,396 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) [2021-06-05 22:39:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 41895 transitions. [2021-06-05 22:39:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:55,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:55,411 INFO L554 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] [2021-06-05 22:39:55,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:55,612 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:55,612 INFO L82 PathProgramCache]: Analyzing trace with hash -354622282, now seen corresponding path program 13 times [2021-06-05 22:39:55,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:55,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480134860] [2021-06-05 22:39:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:55,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480134860] [2021-06-05 22:39:55,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480134860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853435657] [2021-06-05 22:39:55,790 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 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 [2021-06-05 22:39:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:55,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:39:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:55,942 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 [2021-06-05 22:39:55,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:55,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:55,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:55,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:39:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:56,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853435657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:56,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:56,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:39:56,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817488666] [2021-06-05 22:39:56,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:56,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:56,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:56,039 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) [2021-06-05 22:39:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:57,104 INFO L93 Difference]: Finished difference Result 10340 states and 45955 transitions. [2021-06-05 22:39:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:39:57,105 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 [2021-06-05 22:39:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:57,127 INFO L225 Difference]: With dead ends: 10340 [2021-06-05 22:39:57,128 INFO L226 Difference]: Without dead ends: 10331 [2021-06-05 22:39:57,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 925.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:39:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-06-05 22:39:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 9388. [2021-06-05 22:39:57,256 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) [2021-06-05 22:39:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9388 states to 9388 states and 42112 transitions. [2021-06-05 22:39:57,282 INFO L78 Accepts]: Start accepts. Automaton has 9388 states and 42112 transitions. Word has length 33 [2021-06-05 22:39:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:57,282 INFO L482 AbstractCegarLoop]: Abstraction has 9388 states and 42112 transitions. [2021-06-05 22:39:57,282 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) [2021-06-05 22:39:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9388 states and 42112 transitions. [2021-06-05 22:39:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:39:57,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:57,297 INFO L554 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] [2021-06-05 22:39:57,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 22:39:57,497 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2023015724, now seen corresponding path program 14 times [2021-06-05 22:39:57,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:57,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398880063] [2021-06-05 22:39:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:57,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:57,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398880063] [2021-06-05 22:39:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398880063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:57,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240490994] [2021-06-05 22:39:57,677 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 [2021-06-05 22:39:57,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:57,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:39:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:57,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:57,843 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 [2021-06-05 22:39:57,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:57,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:57,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:57,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:39:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:57,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240490994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:57,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:57,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:39:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885060668] [2021-06-05 22:39:57,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:57,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:57,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:57,995 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) [2021-06-05 22:39:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:59,896 INFO L93 Difference]: Finished difference Result 10215 states and 45356 transitions. [2021-06-05 22:39:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:39:59,896 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 [2021-06-05 22:39:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:59,918 INFO L225 Difference]: With dead ends: 10215 [2021-06-05 22:39:59,918 INFO L226 Difference]: Without dead ends: 10136 [2021-06-05 22:39:59,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1600.6ms TimeCoverageRelationStatistics Valid=507, Invalid=2355, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:39:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-05 22:40:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 9339. [2021-06-05 22:40:00,048 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) [2021-06-05 22:40:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9339 states to 9339 states and 41895 transitions. [2021-06-05 22:40:00,073 INFO L78 Accepts]: Start accepts. Automaton has 9339 states and 41895 transitions. Word has length 33 [2021-06-05 22:40:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:00,073 INFO L482 AbstractCegarLoop]: Abstraction has 9339 states and 41895 transitions. [2021-06-05 22:40:00,073 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) [2021-06-05 22:40:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 9339 states and 41895 transitions. [2021-06-05 22:40:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:00,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:00,089 INFO L554 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] [2021-06-05 22:40:00,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 22:40:00,289 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1429653332, now seen corresponding path program 15 times [2021-06-05 22:40:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:00,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197150958] [2021-06-05 22:40:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:00,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:00,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197150958] [2021-06-05 22:40:00,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197150958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:00,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855797672] [2021-06-05 22:40:00,473 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 [2021-06-05 22:40:00,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:00,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:00,638 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 [2021-06-05 22:40:00,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:00,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:00,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:00,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:40:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:00,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855797672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:00,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:00,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:40:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459873386] [2021-06-05 22:40:00,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:40:00,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:40:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:40:00,836 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) [2021-06-05 22:40:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:02,440 INFO L93 Difference]: Finished difference Result 10230 states and 45553 transitions. [2021-06-05 22:40:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:02,440 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 [2021-06-05 22:40:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:02,464 INFO L225 Difference]: With dead ends: 10230 [2021-06-05 22:40:02,465 INFO L226 Difference]: Without dead ends: 10190 [2021-06-05 22:40:02,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1214.4ms TimeCoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:40:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-06-05 22:40:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 9339. [2021-06-05 22:40:02,599 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) [2021-06-05 22:40:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9339 states to 9339 states and 41892 transitions. [2021-06-05 22:40:02,625 INFO L78 Accepts]: Start accepts. Automaton has 9339 states and 41892 transitions. Word has length 33 [2021-06-05 22:40:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:02,625 INFO L482 AbstractCegarLoop]: Abstraction has 9339 states and 41892 transitions. [2021-06-05 22:40:02,625 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) [2021-06-05 22:40:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 9339 states and 41892 transitions. [2021-06-05 22:40:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:02,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:02,641 INFO L554 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] [2021-06-05 22:40:02,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:02,841 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:02,842 INFO L82 PathProgramCache]: Analyzing trace with hash -666737212, now seen corresponding path program 16 times [2021-06-05 22:40:02,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:02,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433864007] [2021-06-05 22:40:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:03,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:03,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433864007] [2021-06-05 22:40:03,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433864007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:03,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049267773] [2021-06-05 22:40:03,027 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 [2021-06-05 22:40:03,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:03,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:03,190 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 [2021-06-05 22:40:03,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:03,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:03,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:03,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:40:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:03,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049267773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:03,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:03,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:40:03,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483531001] [2021-06-05 22:40:03,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:03,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:03,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:03,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:03,371 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) [2021-06-05 22:40:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:04,858 INFO L93 Difference]: Finished difference Result 10454 states and 46522 transitions. [2021-06-05 22:40:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:40:04,859 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 [2021-06-05 22:40:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:04,882 INFO L225 Difference]: With dead ends: 10454 [2021-06-05 22:40:04,882 INFO L226 Difference]: Without dead ends: 10403 [2021-06-05 22:40:04,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1246.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:40:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2021-06-05 22:40:05,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 9315. [2021-06-05 22:40:05,017 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) [2021-06-05 22:40:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 41798 transitions. [2021-06-05 22:40:05,043 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 41798 transitions. Word has length 33 [2021-06-05 22:40:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:05,043 INFO L482 AbstractCegarLoop]: Abstraction has 9315 states and 41798 transitions. [2021-06-05 22:40:05,043 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) [2021-06-05 22:40:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 41798 transitions. [2021-06-05 22:40:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:05,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:05,058 INFO L554 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] [2021-06-05 22:40:05,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 22:40:05,259 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash -932503890, now seen corresponding path program 17 times [2021-06-05 22:40:05,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:05,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31573415] [2021-06-05 22:40:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:05,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31573415] [2021-06-05 22:40:05,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31573415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601238179] [2021-06-05 22:40:05,438 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 [2021-06-05 22:40:05,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:40:05,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:05,630 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 [2021-06-05 22:40:05,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:05,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:05,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:05,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:05,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601238179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:05,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:05,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:05,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327289860] [2021-06-05 22:40:05,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:05,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:05,716 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) [2021-06-05 22:40:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:07,289 INFO L93 Difference]: Finished difference Result 10452 states and 46490 transitions. [2021-06-05 22:40:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:40:07,289 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 [2021-06-05 22:40:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:07,315 INFO L225 Difference]: With dead ends: 10452 [2021-06-05 22:40:07,315 INFO L226 Difference]: Without dead ends: 10437 [2021-06-05 22:40:07,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1095.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:40:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-06-05 22:40:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9348. [2021-06-05 22:40:07,458 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) [2021-06-05 22:40:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9348 states to 9348 states and 41961 transitions. [2021-06-05 22:40:07,485 INFO L78 Accepts]: Start accepts. Automaton has 9348 states and 41961 transitions. Word has length 33 [2021-06-05 22:40:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:07,485 INFO L482 AbstractCegarLoop]: Abstraction has 9348 states and 41961 transitions. [2021-06-05 22:40:07,485 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) [2021-06-05 22:40:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9348 states and 41961 transitions. [2021-06-05 22:40:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:07,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:07,501 INFO L554 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] [2021-06-05 22:40:07,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:07,702 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1285643380, now seen corresponding path program 18 times [2021-06-05 22:40:07,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:07,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059779729] [2021-06-05 22:40:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:07,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:07,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059779729] [2021-06-05 22:40:07,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059779729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:07,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045278177] [2021-06-05 22:40:07,956 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 [2021-06-05 22:40:07,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:40:07,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:07,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:07,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:08,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:08,196 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:40:08,196 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 [2021-06-05 22:40:08,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:08,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:08,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:08,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:51 [2021-06-05 22:40:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:08,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045278177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:08,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:08,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:40:08,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954811820] [2021-06-05 22:40:08,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:40:08,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:40:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:40:08,412 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) [2021-06-05 22:40:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:10,399 INFO L93 Difference]: Finished difference Result 10309 states and 45814 transitions. [2021-06-05 22:40:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:40:10,399 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 [2021-06-05 22:40:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:10,423 INFO L225 Difference]: With dead ends: 10309 [2021-06-05 22:40:10,423 INFO L226 Difference]: Without dead ends: 10294 [2021-06-05 22:40:10,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1329.9ms TimeCoverageRelationStatistics Valid=293, Invalid=2677, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:40:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-06-05 22:40:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 9372. [2021-06-05 22:40:10,558 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) [2021-06-05 22:40:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9372 states to 9372 states and 42071 transitions. [2021-06-05 22:40:10,584 INFO L78 Accepts]: Start accepts. Automaton has 9372 states and 42071 transitions. Word has length 33 [2021-06-05 22:40:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:10,584 INFO L482 AbstractCegarLoop]: Abstraction has 9372 states and 42071 transitions. [2021-06-05 22:40:10,584 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) [2021-06-05 22:40:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 9372 states and 42071 transitions. [2021-06-05 22:40:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:10,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:10,600 INFO L554 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] [2021-06-05 22:40:10,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:10,800 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:10,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1474484946, now seen corresponding path program 19 times [2021-06-05 22:40:10,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:10,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394198211] [2021-06-05 22:40:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:10,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394198211] [2021-06-05 22:40:10,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394198211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887194269] [2021-06-05 22:40:10,978 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 [2021-06-05 22:40:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:11,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:11,166 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 [2021-06-05 22:40:11,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:11,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:11,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:11,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:11,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887194269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:11,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:11,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:11,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781509115] [2021-06-05 22:40:11,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:11,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:11,248 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) [2021-06-05 22:40:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:12,626 INFO L93 Difference]: Finished difference Result 10743 states and 47476 transitions. [2021-06-05 22:40:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:40:12,626 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 [2021-06-05 22:40:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:12,650 INFO L225 Difference]: With dead ends: 10743 [2021-06-05 22:40:12,650 INFO L226 Difference]: Without dead ends: 10728 [2021-06-05 22:40:12,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 916.3ms TimeCoverageRelationStatistics Valid=327, Invalid=1835, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:40:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2021-06-05 22:40:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 9421. [2021-06-05 22:40:12,798 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) [2021-06-05 22:40:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9421 states to 9421 states and 42294 transitions. [2021-06-05 22:40:12,826 INFO L78 Accepts]: Start accepts. Automaton has 9421 states and 42294 transitions. Word has length 33 [2021-06-05 22:40:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:12,826 INFO L482 AbstractCegarLoop]: Abstraction has 9421 states and 42294 transitions. [2021-06-05 22:40:12,826 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) [2021-06-05 22:40:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9421 states and 42294 transitions. [2021-06-05 22:40:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:12,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:12,843 INFO L554 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] [2021-06-05 22:40:13,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 22:40:13,044 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:13,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1152088908, now seen corresponding path program 20 times [2021-06-05 22:40:13,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:13,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272803528] [2021-06-05 22:40:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:13,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:13,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272803528] [2021-06-05 22:40:13,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272803528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:13,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561664970] [2021-06-05 22:40:13,218 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 [2021-06-05 22:40:13,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:13,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:40:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:13,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:13,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:13,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 22:40:13,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:13,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:13,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:13,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:37 [2021-06-05 22:40:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:13,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561664970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:13,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:13,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:40:13,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12293865] [2021-06-05 22:40:13,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:13,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:13,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:13,555 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) [2021-06-05 22:40:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:15,154 INFO L93 Difference]: Finished difference Result 10566 states and 46821 transitions. [2021-06-05 22:40:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:40:15,154 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 [2021-06-05 22:40:15,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:15,179 INFO L225 Difference]: With dead ends: 10566 [2021-06-05 22:40:15,179 INFO L226 Difference]: Without dead ends: 10531 [2021-06-05 22:40:15,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1295.3ms TimeCoverageRelationStatistics Valid=422, Invalid=2440, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:40:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10531 states. [2021-06-05 22:40:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10531 to 9348. [2021-06-05 22:40:15,333 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) [2021-06-05 22:40:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9348 states to 9348 states and 41961 transitions. [2021-06-05 22:40:15,358 INFO L78 Accepts]: Start accepts. Automaton has 9348 states and 41961 transitions. Word has length 33 [2021-06-05 22:40:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:15,359 INFO L482 AbstractCegarLoop]: Abstraction has 9348 states and 41961 transitions. [2021-06-05 22:40:15,359 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) [2021-06-05 22:40:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9348 states and 41961 transitions. [2021-06-05 22:40:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:15,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:15,374 INFO L554 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] [2021-06-05 22:40:15,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:15,575 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:15,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1142951876, now seen corresponding path program 21 times [2021-06-05 22:40:15,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:15,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258027064] [2021-06-05 22:40:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:15,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258027064] [2021-06-05 22:40:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258027064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825247828] [2021-06-05 22:40:15,755 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 [2021-06-05 22:40:15,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:40:15,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:15,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:15,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:15,997 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 [2021-06-05 22:40:15,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:16,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:16,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:16,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:40:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:16,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825247828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:16,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:16,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:16,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904658775] [2021-06-05 22:40:16,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:16,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:16,127 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) [2021-06-05 22:40:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:16,974 INFO L93 Difference]: Finished difference Result 10213 states and 45490 transitions. [2021-06-05 22:40:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:16,974 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 [2021-06-05 22:40:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:16,997 INFO L225 Difference]: With dead ends: 10213 [2021-06-05 22:40:16,997 INFO L226 Difference]: Without dead ends: 10198 [2021-06-05 22:40:16,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:40:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-06-05 22:40:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 9324. [2021-06-05 22:40:17,124 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) [2021-06-05 22:40:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9324 states to 9324 states and 41843 transitions. [2021-06-05 22:40:17,149 INFO L78 Accepts]: Start accepts. Automaton has 9324 states and 41843 transitions. Word has length 33 [2021-06-05 22:40:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:17,149 INFO L482 AbstractCegarLoop]: Abstraction has 9324 states and 41843 transitions. [2021-06-05 22:40:17,149 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) [2021-06-05 22:40:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9324 states and 41843 transitions. [2021-06-05 22:40:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:17,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:17,165 INFO L554 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] [2021-06-05 22:40:17,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 22:40:17,365 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:17,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1016783730, now seen corresponding path program 22 times [2021-06-05 22:40:17,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:17,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197758472] [2021-06-05 22:40:17,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:17,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:17,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197758472] [2021-06-05 22:40:17,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197758472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:17,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193212665] [2021-06-05 22:40:17,548 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 [2021-06-05 22:40:17,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:17,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:17,716 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 [2021-06-05 22:40:17,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:17,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:17,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:17,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:40:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:17,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193212665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:17,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:17,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:17,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172108483] [2021-06-05 22:40:17,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:17,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:17,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:17,829 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) [2021-06-05 22:40:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:19,351 INFO L93 Difference]: Finished difference Result 10218 states and 45535 transitions. [2021-06-05 22:40:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:40:19,351 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 [2021-06-05 22:40:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:19,375 INFO L225 Difference]: With dead ends: 10218 [2021-06-05 22:40:19,375 INFO L226 Difference]: Without dead ends: 10203 [2021-06-05 22:40:19,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1106.6ms TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:40:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2021-06-05 22:40:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 9324. [2021-06-05 22:40:19,513 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) [2021-06-05 22:40:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9324 states to 9324 states and 41843 transitions. [2021-06-05 22:40:19,539 INFO L78 Accepts]: Start accepts. Automaton has 9324 states and 41843 transitions. Word has length 33 [2021-06-05 22:40:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:19,539 INFO L482 AbstractCegarLoop]: Abstraction has 9324 states and 41843 transitions. [2021-06-05 22:40:19,539 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) [2021-06-05 22:40:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9324 states and 41843 transitions. [2021-06-05 22:40:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:19,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:19,554 INFO L554 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] [2021-06-05 22:40:19,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:19,755 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:19,755 INFO L82 PathProgramCache]: Analyzing trace with hash 663644240, now seen corresponding path program 23 times [2021-06-05 22:40:19,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:19,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195347395] [2021-06-05 22:40:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:19,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:19,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195347395] [2021-06-05 22:40:19,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195347395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:19,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128270119] [2021-06-05 22:40:19,936 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 [2021-06-05 22:40:19,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:40:19,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:19,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:19,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:20,102 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 [2021-06-05 22:40:20,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:20,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:20,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:20,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:40:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:20,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128270119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:20,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:20,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:20,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356285004] [2021-06-05 22:40:20,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:20,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:20,202 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) [2021-06-05 22:40:21,349 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 22:40:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:21,753 INFO L93 Difference]: Finished difference Result 10684 states and 47362 transitions. [2021-06-05 22:40:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:40:21,753 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 [2021-06-05 22:40:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:21,778 INFO L225 Difference]: With dead ends: 10684 [2021-06-05 22:40:21,778 INFO L226 Difference]: Without dead ends: 10669 [2021-06-05 22:40:21,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1243.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1971, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:40:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2021-06-05 22:40:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 9406. [2021-06-05 22:40:21,920 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) [2021-06-05 22:40:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9406 states to 9406 states and 42218 transitions. [2021-06-05 22:40:21,946 INFO L78 Accepts]: Start accepts. Automaton has 9406 states and 42218 transitions. Word has length 33 [2021-06-05 22:40:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:21,946 INFO L482 AbstractCegarLoop]: Abstraction has 9406 states and 42218 transitions. [2021-06-05 22:40:21,946 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) [2021-06-05 22:40:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 9406 states and 42218 transitions. [2021-06-05 22:40:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:21,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:21,962 INFO L554 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] [2021-06-05 22:40:22,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:22,162 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1193590768, now seen corresponding path program 24 times [2021-06-05 22:40:22,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:22,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395173006] [2021-06-05 22:40:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:22,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395173006] [2021-06-05 22:40:22,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395173006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618092752] [2021-06-05 22:40:22,340 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 [2021-06-05 22:40:22,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:40:22,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:22,544 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:40:22,545 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 [2021-06-05 22:40:22,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:22,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:22,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:22,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:40:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:22,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618092752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:22,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:22,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:22,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728282158] [2021-06-05 22:40:22,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:22,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:22,758 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) [2021-06-05 22:40:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:24,581 INFO L93 Difference]: Finished difference Result 10048 states and 44824 transitions. [2021-06-05 22:40:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:40:24,582 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 [2021-06-05 22:40:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:24,605 INFO L225 Difference]: With dead ends: 10048 [2021-06-05 22:40:24,605 INFO L226 Difference]: Without dead ends: 10034 [2021-06-05 22:40:24,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1401.4ms TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:40:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10034 states. [2021-06-05 22:40:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10034 to 9403. [2021-06-05 22:40:24,738 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) [2021-06-05 22:40:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9403 states to 9403 states and 42208 transitions. [2021-06-05 22:40:24,765 INFO L78 Accepts]: Start accepts. Automaton has 9403 states and 42208 transitions. Word has length 33 [2021-06-05 22:40:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:24,765 INFO L482 AbstractCegarLoop]: Abstraction has 9403 states and 42208 transitions. [2021-06-05 22:40:24,765 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) [2021-06-05 22:40:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 9403 states and 42208 transitions. [2021-06-05 22:40:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:24,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:24,781 INFO L554 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] [2021-06-05 22:40:24,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:24,982 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:24,982 INFO L82 PathProgramCache]: Analyzing trace with hash 918837862, now seen corresponding path program 25 times [2021-06-05 22:40:24,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:24,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768233433] [2021-06-05 22:40:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:25,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:25,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768233433] [2021-06-05 22:40:25,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768233433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:25,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327566382] [2021-06-05 22:40:25,182 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 [2021-06-05 22:40:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:25,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:25,344 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 29 treesize of output 13 [2021-06-05 22:40:25,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:25,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:25,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:25,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:40:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:25,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327566382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:25,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:25,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:40:25,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995067680] [2021-06-05 22:40:25,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:25,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:25,437 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) [2021-06-05 22:40:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:26,566 INFO L93 Difference]: Finished difference Result 10535 states and 46739 transitions. [2021-06-05 22:40:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:40:26,566 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 [2021-06-05 22:40:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:26,590 INFO L225 Difference]: With dead ends: 10535 [2021-06-05 22:40:26,591 INFO L226 Difference]: Without dead ends: 10500 [2021-06-05 22:40:26,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 932.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10500 states. [2021-06-05 22:40:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10500 to 9333. [2021-06-05 22:40:26,731 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) [2021-06-05 22:40:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9333 states to 9333 states and 41885 transitions. [2021-06-05 22:40:26,756 INFO L78 Accepts]: Start accepts. Automaton has 9333 states and 41885 transitions. Word has length 33 [2021-06-05 22:40:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:26,756 INFO L482 AbstractCegarLoop]: Abstraction has 9333 states and 41885 transitions. [2021-06-05 22:40:26,757 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) [2021-06-05 22:40:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 9333 states and 41885 transitions. [2021-06-05 22:40:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:26,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:26,772 INFO L554 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] [2021-06-05 22:40:26,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 22:40:26,972 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash -549823670, now seen corresponding path program 26 times [2021-06-05 22:40:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535811446] [2021-06-05 22:40:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:27,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:27,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535811446] [2021-06-05 22:40:27,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535811446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:27,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498184475] [2021-06-05 22:40:27,160 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 [2021-06-05 22:40:27,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:40:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:27,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:27,339 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 27 treesize of output 33 [2021-06-05 22:40:27,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:27,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:27,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:27,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-06-05 22:40:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498184475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:27,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:27,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:40:27,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605178290] [2021-06-05 22:40:27,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:40:27,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:40:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:40:27,529 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) [2021-06-05 22:40:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:30,004 INFO L93 Difference]: Finished difference Result 10608 states and 47075 transitions. [2021-06-05 22:40:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:40:30,005 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 [2021-06-05 22:40:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:30,029 INFO L225 Difference]: With dead ends: 10608 [2021-06-05 22:40:30,029 INFO L226 Difference]: Without dead ends: 10593 [2021-06-05 22:40:30,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 2060.7ms TimeCoverageRelationStatistics Valid=554, Invalid=3352, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:40:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-06-05 22:40:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 9394. [2021-06-05 22:40:30,170 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) [2021-06-05 22:40:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9394 states to 9394 states and 42175 transitions. [2021-06-05 22:40:30,288 INFO L78 Accepts]: Start accepts. Automaton has 9394 states and 42175 transitions. Word has length 33 [2021-06-05 22:40:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:30,288 INFO L482 AbstractCegarLoop]: Abstraction has 9394 states and 42175 transitions. [2021-06-05 22:40:30,288 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) [2021-06-05 22:40:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9394 states and 42175 transitions. [2021-06-05 22:40:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:30,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:30,303 INFO L554 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] [2021-06-05 22:40:30,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:30,504 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash -738665236, now seen corresponding path program 27 times [2021-06-05 22:40:30,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:30,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017799773] [2021-06-05 22:40:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:30,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:30,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017799773] [2021-06-05 22:40:30,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017799773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:30,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310623202] [2021-06-05 22:40:30,701 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 [2021-06-05 22:40:30,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:30,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:30,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:30,859 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 [2021-06-05 22:40:30,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:30,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:30,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:30,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:40:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310623202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:31,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:31,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:31,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709185454] [2021-06-05 22:40:31,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:31,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:31,060 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) [2021-06-05 22:40:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:32,390 INFO L93 Difference]: Finished difference Result 10157 states and 45135 transitions. [2021-06-05 22:40:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:40:32,390 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 [2021-06-05 22:40:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:32,414 INFO L225 Difference]: With dead ends: 10157 [2021-06-05 22:40:32,414 INFO L226 Difference]: Without dead ends: 10148 [2021-06-05 22:40:32,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1208.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:40:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-06-05 22:40:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9394. [2021-06-05 22:40:32,548 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) [2021-06-05 22:40:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9394 states to 9394 states and 42175 transitions. [2021-06-05 22:40:32,574 INFO L78 Accepts]: Start accepts. Automaton has 9394 states and 42175 transitions. Word has length 33 [2021-06-05 22:40:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:32,574 INFO L482 AbstractCegarLoop]: Abstraction has 9394 states and 42175 transitions. [2021-06-05 22:40:32,574 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) [2021-06-05 22:40:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9394 states and 42175 transitions. [2021-06-05 22:40:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:32,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:32,589 INFO L554 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] [2021-06-05 22:40:32,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:32,790 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1887908618, now seen corresponding path program 28 times [2021-06-05 22:40:32,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:32,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385150650] [2021-06-05 22:40:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:32,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385150650] [2021-06-05 22:40:32,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385150650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472411790] [2021-06-05 22:40:32,973 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 [2021-06-05 22:40:33,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:33,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:33,129 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 [2021-06-05 22:40:33,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:33,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:33,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:33,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:40:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:33,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472411790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:33,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:33,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:40:33,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559415970] [2021-06-05 22:40:33,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:33,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:33,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:33,223 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) [2021-06-05 22:40:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:34,483 INFO L93 Difference]: Finished difference Result 10671 states and 47189 transitions. [2021-06-05 22:40:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:40:34,483 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 [2021-06-05 22:40:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:34,509 INFO L225 Difference]: With dead ends: 10671 [2021-06-05 22:40:34,510 INFO L226 Difference]: Without dead ends: 10648 [2021-06-05 22:40:34,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 958.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2021-06-05 22:40:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 9410. [2021-06-05 22:40:34,736 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) [2021-06-05 22:40:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9410 states to 9410 states and 42228 transitions. [2021-06-05 22:40:34,763 INFO L78 Accepts]: Start accepts. Automaton has 9410 states and 42228 transitions. Word has length 33 [2021-06-05 22:40:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:34,763 INFO L482 AbstractCegarLoop]: Abstraction has 9410 states and 42228 transitions. [2021-06-05 22:40:34,763 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) [2021-06-05 22:40:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9410 states and 42228 transitions. [2021-06-05 22:40:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:34,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:34,780 INFO L554 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] [2021-06-05 22:40:34,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable472 [2021-06-05 22:40:34,980 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:34,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1996840442, now seen corresponding path program 29 times [2021-06-05 22:40:34,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:34,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948411037] [2021-06-05 22:40:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:35,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:35,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948411037] [2021-06-05 22:40:35,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948411037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:35,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047267451] [2021-06-05 22:40:35,164 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 [2021-06-05 22:40:35,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:35,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:35,323 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 21 treesize of output 13 [2021-06-05 22:40:35,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:35,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:35,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:35,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:40:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:35,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047267451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:35,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:35,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:35,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808823268] [2021-06-05 22:40:35,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:35,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:35,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:35,424 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) [2021-06-05 22:40:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:36,576 INFO L93 Difference]: Finished difference Result 10624 states and 47059 transitions. [2021-06-05 22:40:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:40:36,577 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 [2021-06-05 22:40:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:36,600 INFO L225 Difference]: With dead ends: 10624 [2021-06-05 22:40:36,600 INFO L226 Difference]: Without dead ends: 10602 [2021-06-05 22:40:36,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 936.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10602 states. [2021-06-05 22:40:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10602 to 9354. [2021-06-05 22:40:36,741 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) [2021-06-05 22:40:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9354 states to 9354 states and 41982 transitions. [2021-06-05 22:40:36,766 INFO L78 Accepts]: Start accepts. Automaton has 9354 states and 41982 transitions. Word has length 33 [2021-06-05 22:40:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:36,766 INFO L482 AbstractCegarLoop]: Abstraction has 9354 states and 41982 transitions. [2021-06-05 22:40:36,767 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) [2021-06-05 22:40:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 9354 states and 41982 transitions. [2021-06-05 22:40:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:36,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:36,782 INFO L554 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] [2021-06-05 22:40:36,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:36,983 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1045610378, now seen corresponding path program 30 times [2021-06-05 22:40:36,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:36,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208406434] [2021-06-05 22:40:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:37,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:37,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208406434] [2021-06-05 22:40:37,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208406434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:37,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110707876] [2021-06-05 22:40:37,212 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 [2021-06-05 22:40:37,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:37,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:37,481 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:40:37,482 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 [2021-06-05 22:40:37,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:37,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:37,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:37,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 22:40:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:37,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110707876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:37,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:37,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:37,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672270401] [2021-06-05 22:40:37,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:37,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:37,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:37,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:37,744 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) [2021-06-05 22:40:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:39,390 INFO L93 Difference]: Finished difference Result 9986 states and 44539 transitions. [2021-06-05 22:40:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:40:39,390 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 [2021-06-05 22:40:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:39,414 INFO L225 Difference]: With dead ends: 9986 [2021-06-05 22:40:39,414 INFO L226 Difference]: Without dead ends: 9967 [2021-06-05 22:40:39,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1386.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:40:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9967 states. [2021-06-05 22:40:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9967 to 9342. [2021-06-05 22:40:39,537 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) [2021-06-05 22:40:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 41936 transitions. [2021-06-05 22:40:39,562 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 41936 transitions. Word has length 33 [2021-06-05 22:40:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:39,563 INFO L482 AbstractCegarLoop]: Abstraction has 9342 states and 41936 transitions. [2021-06-05 22:40:39,563 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) [2021-06-05 22:40:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 41936 transitions. [2021-06-05 22:40:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:39,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:39,578 INFO L554 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] [2021-06-05 22:40:39,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:39,778 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:39,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1656499226, now seen corresponding path program 31 times [2021-06-05 22:40:39,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:39,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675582412] [2021-06-05 22:40:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:39,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675582412] [2021-06-05 22:40:39,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675582412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669474935] [2021-06-05 22:40:39,962 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 [2021-06-05 22:40:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:40,206 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 [2021-06-05 22:40:40,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:40,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:40:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:40,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669474935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:40,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:40,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:40,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134833258] [2021-06-05 22:40:40,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:40,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:40,276 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) [2021-06-05 22:40:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:41,482 INFO L93 Difference]: Finished difference Result 9781 states and 43721 transitions. [2021-06-05 22:40:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:40:41,483 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 [2021-06-05 22:40:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:41,505 INFO L225 Difference]: With dead ends: 9781 [2021-06-05 22:40:41,505 INFO L226 Difference]: Without dead ends: 9766 [2021-06-05 22:40:41,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 887.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:40:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9766 states. [2021-06-05 22:40:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9766 to 9375. [2021-06-05 22:40:41,637 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) [2021-06-05 22:40:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9375 states to 9375 states and 42088 transitions. [2021-06-05 22:40:41,661 INFO L78 Accepts]: Start accepts. Automaton has 9375 states and 42088 transitions. Word has length 33 [2021-06-05 22:40:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:41,661 INFO L482 AbstractCegarLoop]: Abstraction has 9375 states and 42088 transitions. [2021-06-05 22:40:41,662 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) [2021-06-05 22:40:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 9375 states and 42088 transitions. [2021-06-05 22:40:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:41,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:41,677 INFO L554 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] [2021-06-05 22:40:41,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 22:40:41,877 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1591865720, now seen corresponding path program 32 times [2021-06-05 22:40:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:41,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052293018] [2021-06-05 22:40:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:42,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:42,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052293018] [2021-06-05 22:40:42,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052293018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:42,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237673648] [2021-06-05 22:40:42,056 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 [2021-06-05 22:40:42,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:40:42,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:42,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:42,355 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 [2021-06-05 22:40:42,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:42,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:42,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:42,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:39 [2021-06-05 22:40:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:42,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237673648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:42,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:42,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:42,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312861285] [2021-06-05 22:40:42,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:42,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:42,502 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) [2021-06-05 22:40:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:43,165 INFO L93 Difference]: Finished difference Result 9709 states and 43337 transitions. [2021-06-05 22:40:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:40:43,165 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 [2021-06-05 22:40:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:43,187 INFO L225 Difference]: With dead ends: 9709 [2021-06-05 22:40:43,187 INFO L226 Difference]: Without dead ends: 9694 [2021-06-05 22:40:43,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 659.6ms TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:40:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9694 states. [2021-06-05 22:40:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9694 to 9378. [2021-06-05 22:40:43,312 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) [2021-06-05 22:40:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9378 states to 9378 states and 42099 transitions. [2021-06-05 22:40:43,432 INFO L78 Accepts]: Start accepts. Automaton has 9378 states and 42099 transitions. Word has length 33 [2021-06-05 22:40:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:43,432 INFO L482 AbstractCegarLoop]: Abstraction has 9378 states and 42099 transitions. [2021-06-05 22:40:43,433 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) [2021-06-05 22:40:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 9378 states and 42099 transitions. [2021-06-05 22:40:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:43,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:43,449 INFO L554 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] [2021-06-05 22:40:43,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:43,649 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2025895066, now seen corresponding path program 33 times [2021-06-05 22:40:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:43,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94582292] [2021-06-05 22:40:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:43,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:43,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94582292] [2021-06-05 22:40:43,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94582292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:43,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344640483] [2021-06-05 22:40:43,829 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 [2021-06-05 22:40:43,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:43,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:43,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:40:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:44,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:44,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:44,070 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 [2021-06-05 22:40:44,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:44,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:44,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:44,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:30 [2021-06-05 22:40:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:44,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344640483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:44,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:44,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:44,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992444888] [2021-06-05 22:40:44,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:44,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:44,216 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) [2021-06-05 22:40:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:44,966 INFO L93 Difference]: Finished difference Result 9695 states and 43311 transitions. [2021-06-05 22:40:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:40:44,967 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 [2021-06-05 22:40:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:44,989 INFO L225 Difference]: With dead ends: 9695 [2021-06-05 22:40:44,990 INFO L226 Difference]: Without dead ends: 9680 [2021-06-05 22:40:44,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:40:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9680 states. [2021-06-05 22:40:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9680 to 9378. [2021-06-05 22:40:45,117 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) [2021-06-05 22:40:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9378 states to 9378 states and 42099 transitions. [2021-06-05 22:40:45,143 INFO L78 Accepts]: Start accepts. Automaton has 9378 states and 42099 transitions. Word has length 33 [2021-06-05 22:40:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:45,143 INFO L482 AbstractCegarLoop]: Abstraction has 9378 states and 42099 transitions. [2021-06-05 22:40:45,143 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) [2021-06-05 22:40:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 9378 states and 42099 transitions. [2021-06-05 22:40:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:45,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:45,159 INFO L554 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] [2021-06-05 22:40:45,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:45,360 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1672755576, now seen corresponding path program 34 times [2021-06-05 22:40:45,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:45,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589498116] [2021-06-05 22:40:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:45,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:45,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589498116] [2021-06-05 22:40:45,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589498116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:45,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691334146] [2021-06-05 22:40:45,537 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 [2021-06-05 22:40:45,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:45,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:45,743 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 [2021-06-05 22:40:45,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:45,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:45,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:45,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-06-05 22:40:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:45,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691334146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:45,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:45,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:45,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849493257] [2021-06-05 22:40:45,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:45,828 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) [2021-06-05 22:40:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:47,012 INFO L93 Difference]: Finished difference Result 10568 states and 46841 transitions. [2021-06-05 22:40:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:40:47,012 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 [2021-06-05 22:40:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:47,036 INFO L225 Difference]: With dead ends: 10568 [2021-06-05 22:40:47,037 INFO L226 Difference]: Without dead ends: 10553 [2021-06-05 22:40:47,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10553 states. [2021-06-05 22:40:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10553 to 9472. [2021-06-05 22:40:47,186 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) [2021-06-05 22:40:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 42539 transitions. [2021-06-05 22:40:47,212 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 42539 transitions. Word has length 33 [2021-06-05 22:40:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:47,212 INFO L482 AbstractCegarLoop]: Abstraction has 9472 states and 42539 transitions. [2021-06-05 22:40:47,212 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) [2021-06-05 22:40:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 42539 transitions. [2021-06-05 22:40:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:47,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:47,228 INFO L554 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] [2021-06-05 22:40:47,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:47,428 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash -184479432, now seen corresponding path program 35 times [2021-06-05 22:40:47,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:47,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092377011] [2021-06-05 22:40:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:47,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:47,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092377011] [2021-06-05 22:40:47,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092377011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:47,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840655444] [2021-06-05 22:40:47,606 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 [2021-06-05 22:40:47,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:40:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:47,908 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 [2021-06-05 22:40:47,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:47,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:47,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840655444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:47,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:47,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:40:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267940488] [2021-06-05 22:40:47,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:47,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:47,985 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) [2021-06-05 22:40:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:49,084 INFO L93 Difference]: Finished difference Result 10384 states and 46104 transitions. [2021-06-05 22:40:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:40:49,084 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 [2021-06-05 22:40:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:49,108 INFO L225 Difference]: With dead ends: 10384 [2021-06-05 22:40:49,108 INFO L226 Difference]: Without dead ends: 10349 [2021-06-05 22:40:49,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 789.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:40:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2021-06-05 22:40:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 9420. [2021-06-05 22:40:49,251 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) [2021-06-05 22:40:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 42306 transitions. [2021-06-05 22:40:49,276 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 42306 transitions. Word has length 33 [2021-06-05 22:40:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:49,277 INFO L482 AbstractCegarLoop]: Abstraction has 9420 states and 42306 transitions. [2021-06-05 22:40:49,277 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) [2021-06-05 22:40:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 42306 transitions. [2021-06-05 22:40:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:49,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:49,292 INFO L554 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] [2021-06-05 22:40:49,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:49,493 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 116248142, now seen corresponding path program 36 times [2021-06-05 22:40:49,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:49,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369661602] [2021-06-05 22:40:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:49,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:49,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369661602] [2021-06-05 22:40:49,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369661602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:49,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136075298] [2021-06-05 22:40:49,671 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 [2021-06-05 22:40:49,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:49,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:49,993 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:40:49,993 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 [2021-06-05 22:40:49,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:40:50,019 INFO L628 ElimStorePlain]: treesize reduction 89, result has 18.3 percent of original size [2021-06-05 22:40:50,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:50,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-06-05 22:40:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:50,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136075298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:50,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:50,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:40:50,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452663865] [2021-06-05 22:40:50,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:40:50,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:40:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:40:50,125 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) [2021-06-05 22:40:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:51,450 INFO L93 Difference]: Finished difference Result 9873 states and 44007 transitions. [2021-06-05 22:40:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:40:51,451 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 [2021-06-05 22:40:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:51,472 INFO L225 Difference]: With dead ends: 9873 [2021-06-05 22:40:51,473 INFO L226 Difference]: Without dead ends: 9858 [2021-06-05 22:40:51,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 997.2ms TimeCoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:40:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2021-06-05 22:40:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 9420. [2021-06-05 22:40:51,597 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) [2021-06-05 22:40:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 42306 transitions. [2021-06-05 22:40:51,622 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 42306 transitions. Word has length 33 [2021-06-05 22:40:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:51,622 INFO L482 AbstractCegarLoop]: Abstraction has 9420 states and 42306 transitions. [2021-06-05 22:40:51,623 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) [2021-06-05 22:40:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 42306 transitions. [2021-06-05 22:40:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:51,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:51,638 INFO L554 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] [2021-06-05 22:40:51,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 22:40:51,838 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash 550277488, now seen corresponding path program 37 times [2021-06-05 22:40:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:51,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751054992] [2021-06-05 22:40:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:52,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751054992] [2021-06-05 22:40:52,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751054992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577700968] [2021-06-05 22:40:52,021 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 [2021-06-05 22:40:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:52,304 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 [2021-06-05 22:40:52,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:52,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577700968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:52,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:52,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616202719] [2021-06-05 22:40:52,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:52,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:52,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:52,391 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) [2021-06-05 22:40:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:54,055 INFO L93 Difference]: Finished difference Result 10104 states and 45013 transitions. [2021-06-05 22:40:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:40:54,055 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 [2021-06-05 22:40:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:54,078 INFO L225 Difference]: With dead ends: 10104 [2021-06-05 22:40:54,078 INFO L226 Difference]: Without dead ends: 10089 [2021-06-05 22:40:54,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1055.6ms TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:40:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2021-06-05 22:40:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 9351. [2021-06-05 22:40:54,211 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) [2021-06-05 22:40:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9351 states to 9351 states and 41978 transitions. [2021-06-05 22:40:54,236 INFO L78 Accepts]: Start accepts. Automaton has 9351 states and 41978 transitions. Word has length 33 [2021-06-05 22:40:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:54,236 INFO L482 AbstractCegarLoop]: Abstraction has 9351 states and 41978 transitions. [2021-06-05 22:40:54,236 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) [2021-06-05 22:40:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 9351 states and 41978 transitions. [2021-06-05 22:40:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:54,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:54,251 INFO L554 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] [2021-06-05 22:40:54,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:54,452 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash -614658574, now seen corresponding path program 38 times [2021-06-05 22:40:54,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:54,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83184355] [2021-06-05 22:40:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:54,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:54,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83184355] [2021-06-05 22:40:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83184355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:54,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564817219] [2021-06-05 22:40:54,633 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 [2021-06-05 22:40:54,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:54,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:54,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:40:54,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:54,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:54,935 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 [2021-06-05 22:40:54,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:54,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:54,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:54,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:51 [2021-06-05 22:40:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:55,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564817219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:55,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:55,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:55,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428223068] [2021-06-05 22:40:55,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:55,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:55,082 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) [2021-06-05 22:40:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:56,141 INFO L93 Difference]: Finished difference Result 10115 states and 45057 transitions. [2021-06-05 22:40:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:40:56,142 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 [2021-06-05 22:40:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:56,166 INFO L225 Difference]: With dead ends: 10115 [2021-06-05 22:40:56,166 INFO L226 Difference]: Without dead ends: 10085 [2021-06-05 22:40:56,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 842.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:40:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10085 states. [2021-06-05 22:40:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10085 to 9396. [2021-06-05 22:40:56,308 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) [2021-06-05 22:40:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 42196 transitions. [2021-06-05 22:40:56,436 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 42196 transitions. Word has length 33 [2021-06-05 22:40:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:56,436 INFO L482 AbstractCegarLoop]: Abstraction has 9396 states and 42196 transitions. [2021-06-05 22:40:56,436 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) [2021-06-05 22:40:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 42196 transitions. [2021-06-05 22:40:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:56,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:56,452 INFO L554 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] [2021-06-05 22:40:56,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-05 22:40:56,653 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:56,653 INFO L82 PathProgramCache]: Analyzing trace with hash -180629228, now seen corresponding path program 39 times [2021-06-05 22:40:56,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:56,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90199608] [2021-06-05 22:40:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:56,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:56,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90199608] [2021-06-05 22:40:56,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90199608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:56,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078405941] [2021-06-05 22:40:56,829 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 [2021-06-05 22:40:56,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:56,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:56,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:57,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:57,052 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 25 treesize of output 41 [2021-06-05 22:40:57,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:57,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:57,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:57,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:35 [2021-06-05 22:40:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:57,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078405941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:57,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:57,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:57,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776431591] [2021-06-05 22:40:57,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:40:57,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:40:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:57,236 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) [2021-06-05 22:40:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:58,323 INFO L93 Difference]: Finished difference Result 9916 states and 44276 transitions. [2021-06-05 22:40:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:40:58,323 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 [2021-06-05 22:40:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:58,346 INFO L225 Difference]: With dead ends: 9916 [2021-06-05 22:40:58,346 INFO L226 Difference]: Without dead ends: 9901 [2021-06-05 22:40:58,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 778.6ms TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:40:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9901 states. [2021-06-05 22:40:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9901 to 9396. [2021-06-05 22:40:58,487 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) [2021-06-05 22:40:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 42196 transitions. [2021-06-05 22:40:58,513 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 42196 transitions. Word has length 33 [2021-06-05 22:40:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:58,514 INFO L482 AbstractCegarLoop]: Abstraction has 9396 states and 42196 transitions. [2021-06-05 22:40:58,514 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) [2021-06-05 22:40:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 42196 transitions. [2021-06-05 22:40:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:40:58,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:58,529 INFO L554 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] [2021-06-05 22:40:58,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:58,730 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:58,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash -533768718, now seen corresponding path program 40 times [2021-06-05 22:40:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:58,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453181618] [2021-06-05 22:40:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:58,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453181618] [2021-06-05 22:40:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453181618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179206078] [2021-06-05 22:40:58,927 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 [2021-06-05 22:40:58,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:58,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:58,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:40:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:59,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:40:59,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:59,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:59,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:59,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179206078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:59,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173669755] [2021-06-05 22:40:59,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:59,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:59,207 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) [2021-06-05 22:41:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:00,705 INFO L93 Difference]: Finished difference Result 10826 states and 47851 transitions. [2021-06-05 22:41:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:41:00,706 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 [2021-06-05 22:41:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:00,730 INFO L225 Difference]: With dead ends: 10826 [2021-06-05 22:41:00,730 INFO L226 Difference]: Without dead ends: 10796 [2021-06-05 22:41:00,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1094.4ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:41:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10796 states. [2021-06-05 22:41:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10796 to 9505. [2021-06-05 22:41:00,931 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) [2021-06-05 22:41:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9505 states to 9505 states and 42702 transitions. [2021-06-05 22:41:00,956 INFO L78 Accepts]: Start accepts. Automaton has 9505 states and 42702 transitions. Word has length 33 [2021-06-05 22:41:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:00,956 INFO L482 AbstractCegarLoop]: Abstraction has 9505 states and 42702 transitions. [2021-06-05 22:41:00,957 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) [2021-06-05 22:41:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9505 states and 42702 transitions. [2021-06-05 22:41:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:00,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:00,972 INFO L554 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] [2021-06-05 22:41:01,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:01,172 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:01,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1903963570, now seen corresponding path program 41 times [2021-06-05 22:41:01,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:01,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823876034] [2021-06-05 22:41:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:01,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:01,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823876034] [2021-06-05 22:41:01,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823876034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:01,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013916344] [2021-06-05 22:41:01,353 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 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 [2021-06-05 22:41:01,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:41:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:01,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:01,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:01,583 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 [2021-06-05 22:41:01,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:01,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:01,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:01,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:10 [2021-06-05 22:41:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013916344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:01,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:01,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:41:01,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25579308] [2021-06-05 22:41:01,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:01,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:01,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:01,661 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) [2021-06-05 22:41:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:02,616 INFO L93 Difference]: Finished difference Result 10194 states and 45326 transitions. [2021-06-05 22:41:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:41:02,616 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 [2021-06-05 22:41:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:02,639 INFO L225 Difference]: With dead ends: 10194 [2021-06-05 22:41:02,639 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 22:41:02,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:41:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 22:41:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9499. [2021-06-05 22:41:02,777 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) [2021-06-05 22:41:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 42681 transitions. [2021-06-05 22:41:02,803 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 42681 transitions. Word has length 33 [2021-06-05 22:41:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:02,804 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 42681 transitions. [2021-06-05 22:41:02,804 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) [2021-06-05 22:41:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 42681 transitions. [2021-06-05 22:41:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:02,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:02,819 INFO L554 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] [2021-06-05 22:41:03,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 22:41:03,020 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1092304480, now seen corresponding path program 42 times [2021-06-05 22:41:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:03,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451886785] [2021-06-05 22:41:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:03,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:03,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451886785] [2021-06-05 22:41:03,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451886785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:03,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123375598] [2021-06-05 22:41:03,201 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 [2021-06-05 22:41:03,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:41:03,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:03,469 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:41:03,470 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 [2021-06-05 22:41:03,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:03,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:03,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:03,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:56 [2021-06-05 22:41:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123375598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:03,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:03,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:41:03,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836900413] [2021-06-05 22:41:03,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:41:03,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:03,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:41:03,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:41:03,705 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) [2021-06-05 22:41:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:05,252 INFO L93 Difference]: Finished difference Result 10168 states and 45276 transitions. [2021-06-05 22:41:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:41:05,253 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 [2021-06-05 22:41:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:05,276 INFO L225 Difference]: With dead ends: 10168 [2021-06-05 22:41:05,276 INFO L226 Difference]: Without dead ends: 10138 [2021-06-05 22:41:05,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1249.2ms TimeCoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:41:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2021-06-05 22:41:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 9502. [2021-06-05 22:41:05,468 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) [2021-06-05 22:41:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 42691 transitions. [2021-06-05 22:41:05,497 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 42691 transitions. Word has length 33 [2021-06-05 22:41:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:05,498 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 42691 transitions. [2021-06-05 22:41:05,498 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) [2021-06-05 22:41:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 42691 transitions. [2021-06-05 22:41:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:05,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:05,515 INFO L554 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] [2021-06-05 22:41:05,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:05,716 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1118070018, now seen corresponding path program 43 times [2021-06-05 22:41:05,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:05,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362590428] [2021-06-05 22:41:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:05,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:05,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362590428] [2021-06-05 22:41:05,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362590428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:05,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227270132] [2021-06-05 22:41:05,891 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 [2021-06-05 22:41:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:05,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:05,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:06,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:06,086 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 [2021-06-05 22:41:06,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:06,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:06,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:06,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-06-05 22:41:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:06,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227270132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:06,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:06,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:41:06,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990865092] [2021-06-05 22:41:06,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:06,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:06,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:06,161 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) [2021-06-05 22:41:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:07,306 INFO L93 Difference]: Finished difference Result 10653 states and 47177 transitions. [2021-06-05 22:41:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:41:07,306 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 [2021-06-05 22:41:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:07,330 INFO L225 Difference]: With dead ends: 10653 [2021-06-05 22:41:07,331 INFO L226 Difference]: Without dead ends: 10608 [2021-06-05 22:41:07,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 906.4ms TimeCoverageRelationStatistics Valid=304, Invalid=2048, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:41:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10608 states. [2021-06-05 22:41:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10608 to 9408. [2021-06-05 22:41:07,483 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) [2021-06-05 22:41:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9408 states to 9408 states and 42251 transitions. [2021-06-05 22:41:07,511 INFO L78 Accepts]: Start accepts. Automaton has 9408 states and 42251 transitions. Word has length 33 [2021-06-05 22:41:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:07,512 INFO L482 AbstractCegarLoop]: Abstraction has 9408 states and 42251 transitions. [2021-06-05 22:41:07,512 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) [2021-06-05 22:41:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 9408 states and 42251 transitions. [2021-06-05 22:41:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:07,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:07,528 INFO L554 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] [2021-06-05 22:41:07,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 22:41:07,728 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash -373894954, now seen corresponding path program 44 times [2021-06-05 22:41:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:07,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915034896] [2021-06-05 22:41:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:07,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:07,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915034896] [2021-06-05 22:41:07,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915034896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:07,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338304033] [2021-06-05 22:41:07,928 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 [2021-06-05 22:41:07,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:07,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:41:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:08,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:08,113 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 [2021-06-05 22:41:08,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:08,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:41:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:08,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338304033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:08,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:08,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:41:08,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903403792] [2021-06-05 22:41:08,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:41:08,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:08,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:41:08,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:41:08,294 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) [2021-06-05 22:41:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:10,461 INFO L93 Difference]: Finished difference Result 10273 states and 45836 transitions. [2021-06-05 22:41:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:41:10,461 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 [2021-06-05 22:41:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:10,484 INFO L225 Difference]: With dead ends: 10273 [2021-06-05 22:41:10,484 INFO L226 Difference]: Without dead ends: 10243 [2021-06-05 22:41:10,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1795.0ms TimeCoverageRelationStatistics Valid=443, Invalid=2979, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:41:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-06-05 22:41:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9408. [2021-06-05 22:41:10,616 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) [2021-06-05 22:41:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9408 states to 9408 states and 42251 transitions. [2021-06-05 22:41:10,642 INFO L78 Accepts]: Start accepts. Automaton has 9408 states and 42251 transitions. Word has length 33 [2021-06-05 22:41:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:10,642 INFO L482 AbstractCegarLoop]: Abstraction has 9408 states and 42251 transitions. [2021-06-05 22:41:10,642 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) [2021-06-05 22:41:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 9408 states and 42251 transitions. [2021-06-05 22:41:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:10,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:10,658 INFO L554 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] [2021-06-05 22:41:10,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 22:41:10,858 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash -727034444, now seen corresponding path program 45 times [2021-06-05 22:41:10,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:10,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13290466] [2021-06-05 22:41:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:11,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:11,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13290466] [2021-06-05 22:41:11,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13290466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:11,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404269326] [2021-06-05 22:41:11,037 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 [2021-06-05 22:41:11,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:11,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:11,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:11,207 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 [2021-06-05 22:41:11,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:11,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:11,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:11,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 22:41:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:11,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404269326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:11,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:11,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:41:11,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811564997] [2021-06-05 22:41:11,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:41:11,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:11,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:41:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:41:11,428 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) [2021-06-05 22:41:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:12,723 INFO L93 Difference]: Finished difference Result 9971 states and 44469 transitions. [2021-06-05 22:41:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:41:12,724 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 [2021-06-05 22:41:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:12,746 INFO L225 Difference]: With dead ends: 9971 [2021-06-05 22:41:12,746 INFO L226 Difference]: Without dead ends: 9956 [2021-06-05 22:41:12,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1224.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:41:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9956 states. [2021-06-05 22:41:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9956 to 9441. [2021-06-05 22:41:12,875 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) [2021-06-05 22:41:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 42403 transitions. [2021-06-05 22:41:12,900 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 42403 transitions. Word has length 33 [2021-06-05 22:41:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:12,900 INFO L482 AbstractCegarLoop]: Abstraction has 9441 states and 42403 transitions. [2021-06-05 22:41:12,900 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) [2021-06-05 22:41:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 42403 transitions. [2021-06-05 22:41:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:12,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:12,916 INFO L554 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] [2021-06-05 22:41:13,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 22:41:13,116 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash -915876010, now seen corresponding path program 46 times [2021-06-05 22:41:13,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:13,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591304370] [2021-06-05 22:41:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:13,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:13,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591304370] [2021-06-05 22:41:13,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591304370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:13,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200184281] [2021-06-05 22:41:13,295 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 [2021-06-05 22:41:13,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:13,465 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 [2021-06-05 22:41:13,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:13,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:41:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:13,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200184281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:13,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:13,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:13,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154912432] [2021-06-05 22:41:13,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:13,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:13,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:13,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:13,565 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) [2021-06-05 22:41:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:14,865 INFO L93 Difference]: Finished difference Result 10438 states and 46253 transitions. [2021-06-05 22:41:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:41:14,866 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 [2021-06-05 22:41:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:14,890 INFO L225 Difference]: With dead ends: 10438 [2021-06-05 22:41:14,890 INFO L226 Difference]: Without dead ends: 10414 [2021-06-05 22:41:14,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1080.2ms TimeCoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:41:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2021-06-05 22:41:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 9520. [2021-06-05 22:41:15,034 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) [2021-06-05 22:41:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9520 states to 9520 states and 42768 transitions. [2021-06-05 22:41:15,060 INFO L78 Accepts]: Start accepts. Automaton has 9520 states and 42768 transitions. Word has length 33 [2021-06-05 22:41:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:15,060 INFO L482 AbstractCegarLoop]: Abstraction has 9520 states and 42768 transitions. [2021-06-05 22:41:15,060 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) [2021-06-05 22:41:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 9520 states and 42768 transitions. [2021-06-05 22:41:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:15,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:15,076 INFO L554 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] [2021-06-05 22:41:15,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:15,277 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1710697844, now seen corresponding path program 47 times [2021-06-05 22:41:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:15,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253083180] [2021-06-05 22:41:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:15,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:15,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253083180] [2021-06-05 22:41:15,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253083180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:15,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529787857] [2021-06-05 22:41:15,457 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 [2021-06-05 22:41:15,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:15,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:41:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:15,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:15,627 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 [2021-06-05 22:41:15,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:15,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:15,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:15,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:18 [2021-06-05 22:41:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:15,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529787857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:15,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:15,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:41:15,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100917144] [2021-06-05 22:41:15,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:15,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:15,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:15,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:15,743 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) [2021-06-05 22:41:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:16,918 INFO L93 Difference]: Finished difference Result 10357 states and 46038 transitions. [2021-06-05 22:41:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:41:16,918 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 [2021-06-05 22:41:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:16,941 INFO L225 Difference]: With dead ends: 10357 [2021-06-05 22:41:16,942 INFO L226 Difference]: Without dead ends: 10308 [2021-06-05 22:41:16,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 994.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:41:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-06-05 22:41:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 9447. [2021-06-05 22:41:17,085 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) [2021-06-05 22:41:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 42435 transitions. [2021-06-05 22:41:17,110 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 42435 transitions. Word has length 33 [2021-06-05 22:41:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:17,110 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 42435 transitions. [2021-06-05 22:41:17,110 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) [2021-06-05 22:41:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 42435 transitions. [2021-06-05 22:41:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:17,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:17,126 INFO L554 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] [2021-06-05 22:41:17,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:17,326 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1095791054, now seen corresponding path program 48 times [2021-06-05 22:41:17,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:17,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612227394] [2021-06-05 22:41:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:17,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:17,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612227394] [2021-06-05 22:41:17,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612227394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:17,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056869975] [2021-06-05 22:41:17,512 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 [2021-06-05 22:41:17,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:17,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:17,809 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 [2021-06-05 22:41:17,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:17,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:17,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:17,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:41:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:18,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056869975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:18,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:18,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:41:18,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750638977] [2021-06-05 22:41:18,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:41:18,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:18,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:41:18,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:41:18,026 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) [2021-06-05 22:41:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:19,738 INFO L93 Difference]: Finished difference Result 10203 states and 45439 transitions. [2021-06-05 22:41:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:41:19,738 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 [2021-06-05 22:41:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:19,760 INFO L225 Difference]: With dead ends: 10203 [2021-06-05 22:41:19,761 INFO L226 Difference]: Without dead ends: 10188 [2021-06-05 22:41:19,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1489.8ms TimeCoverageRelationStatistics Valid=349, Invalid=1813, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:41:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2021-06-05 22:41:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 9508. [2021-06-05 22:41:19,895 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) [2021-06-05 22:41:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 42725 transitions. [2021-06-05 22:41:19,920 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 42725 transitions. Word has length 33 [2021-06-05 22:41:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:19,921 INFO L482 AbstractCegarLoop]: Abstraction has 9508 states and 42725 transitions. [2021-06-05 22:41:19,921 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) [2021-06-05 22:41:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 42725 transitions. [2021-06-05 22:41:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:19,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:19,936 INFO L554 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] [2021-06-05 22:41:20,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 22:41:20,137 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1284632620, now seen corresponding path program 49 times [2021-06-05 22:41:20,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:20,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912577105] [2021-06-05 22:41:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:20,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912577105] [2021-06-05 22:41:20,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912577105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310511168] [2021-06-05 22:41:20,322 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 [2021-06-05 22:41:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:20,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:20,496 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 [2021-06-05 22:41:20,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:20,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:20,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:20,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:41:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:20,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310511168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:20,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:20,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:20,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602762788] [2021-06-05 22:41:20,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:20,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:20,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:20,599 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) [2021-06-05 22:41:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:21,991 INFO L93 Difference]: Finished difference Result 10667 states and 47196 transitions. [2021-06-05 22:41:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:41:21,992 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 [2021-06-05 22:41:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:22,016 INFO L225 Difference]: With dead ends: 10667 [2021-06-05 22:41:22,016 INFO L226 Difference]: Without dead ends: 10649 [2021-06-05 22:41:22,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1163.4ms TimeCoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:41:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10649 states. [2021-06-05 22:41:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10649 to 9581. [2021-06-05 22:41:22,192 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) [2021-06-05 22:41:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 43055 transitions. [2021-06-05 22:41:22,220 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 43055 transitions. Word has length 33 [2021-06-05 22:41:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:22,220 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 43055 transitions. [2021-06-05 22:41:22,220 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) [2021-06-05 22:41:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 43055 transitions. [2021-06-05 22:41:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:22,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:22,238 INFO L554 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] [2021-06-05 22:41:22,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:22,438 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1341941234, now seen corresponding path program 50 times [2021-06-05 22:41:22,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:22,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790795315] [2021-06-05 22:41:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:22,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:22,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790795315] [2021-06-05 22:41:22,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790795315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:22,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988274071] [2021-06-05 22:41:22,635 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 [2021-06-05 22:41:22,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:22,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:41:22,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:22,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:22,817 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 [2021-06-05 22:41:22,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:22,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:22,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:22,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:41:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:22,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988274071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:22,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:22,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:41:22,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020088861] [2021-06-05 22:41:22,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:22,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:22,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:22,984 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) [2021-06-05 22:41:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:25,200 INFO L93 Difference]: Finished difference Result 10628 states and 46970 transitions. [2021-06-05 22:41:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:41:25,200 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 [2021-06-05 22:41:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:25,225 INFO L225 Difference]: With dead ends: 10628 [2021-06-05 22:41:25,225 INFO L226 Difference]: Without dead ends: 10579 [2021-06-05 22:41:25,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1769.2ms TimeCoverageRelationStatistics Valid=500, Invalid=2806, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:41:25,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10579 states. [2021-06-05 22:41:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10579 to 9492. [2021-06-05 22:41:25,387 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) [2021-06-05 22:41:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9492 states to 9492 states and 42639 transitions. [2021-06-05 22:41:25,414 INFO L78 Accepts]: Start accepts. Automaton has 9492 states and 42639 transitions. Word has length 33 [2021-06-05 22:41:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:25,414 INFO L482 AbstractCegarLoop]: Abstraction has 9492 states and 42639 transitions. [2021-06-05 22:41:25,414 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) [2021-06-05 22:41:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 9492 states and 42639 transitions. [2021-06-05 22:41:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:25,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:25,431 INFO L554 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] [2021-06-05 22:41:25,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 22:41:25,631 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 499642994, now seen corresponding path program 51 times [2021-06-05 22:41:25,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:25,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828272455] [2021-06-05 22:41:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:25,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:25,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828272455] [2021-06-05 22:41:25,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828272455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:25,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258855632] [2021-06-05 22:41:25,823 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 [2021-06-05 22:41:25,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:25,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:25,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:41:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:26,055 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:41:26,055 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 [2021-06-05 22:41:26,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:26,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:26,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:26,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:57 [2021-06-05 22:41:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:26,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258855632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:26,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:26,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:41:26,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917082662] [2021-06-05 22:41:26,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:41:26,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:41:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:41:26,274 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) [2021-06-05 22:41:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:28,339 INFO L93 Difference]: Finished difference Result 9967 states and 44480 transitions. [2021-06-05 22:41:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:41:28,340 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 [2021-06-05 22:41:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:28,363 INFO L225 Difference]: With dead ends: 9967 [2021-06-05 22:41:28,363 INFO L226 Difference]: Without dead ends: 9929 [2021-06-05 22:41:28,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1622.5ms TimeCoverageRelationStatistics Valid=239, Invalid=2413, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:41:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2021-06-05 22:41:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 9495. [2021-06-05 22:41:28,509 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) [2021-06-05 22:41:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9495 states to 9495 states and 42649 transitions. [2021-06-05 22:41:28,539 INFO L78 Accepts]: Start accepts. Automaton has 9495 states and 42649 transitions. Word has length 33 [2021-06-05 22:41:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:28,539 INFO L482 AbstractCegarLoop]: Abstraction has 9495 states and 42649 transitions. [2021-06-05 22:41:28,539 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) [2021-06-05 22:41:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9495 states and 42649 transitions. [2021-06-05 22:41:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:28,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:28,556 INFO L554 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] [2021-06-05 22:41:28,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:28,757 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1596747550, now seen corresponding path program 52 times [2021-06-05 22:41:28,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:28,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206763606] [2021-06-05 22:41:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:28,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:28,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206763606] [2021-06-05 22:41:28,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206763606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:28,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25860840] [2021-06-05 22:41:28,945 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 [2021-06-05 22:41:28,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:28,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:29,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:29,123 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 [2021-06-05 22:41:29,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:29,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:29,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:29,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:41:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:29,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25860840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:29,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:29,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:41:29,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237254703] [2021-06-05 22:41:29,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:29,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:29,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:29,224 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) [2021-06-05 22:41:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:30,672 INFO L93 Difference]: Finished difference Result 10804 states and 47776 transitions. [2021-06-05 22:41:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:41:30,672 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 [2021-06-05 22:41:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:30,698 INFO L225 Difference]: With dead ends: 10804 [2021-06-05 22:41:30,698 INFO L226 Difference]: Without dead ends: 10762 [2021-06-05 22:41:30,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1180.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:41:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2021-06-05 22:41:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 9457. [2021-06-05 22:41:30,856 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) [2021-06-05 22:41:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9457 states to 9457 states and 42471 transitions. [2021-06-05 22:41:30,883 INFO L78 Accepts]: Start accepts. Automaton has 9457 states and 42471 transitions. Word has length 33 [2021-06-05 22:41:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:30,883 INFO L482 AbstractCegarLoop]: Abstraction has 9457 states and 42471 transitions. [2021-06-05 22:41:30,883 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) [2021-06-05 22:41:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 9457 states and 42471 transitions. [2021-06-05 22:41:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:30,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:30,900 INFO L554 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] [2021-06-05 22:41:31,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:31,100 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash -193174718, now seen corresponding path program 24 times [2021-06-05 22:41:31,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:31,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135989877] [2021-06-05 22:41:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135989877] [2021-06-05 22:41:31,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135989877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643297130] [2021-06-05 22:41:31,340 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 [2021-06-05 22:41:31,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:31,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:31,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:31,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:31,539 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 [2021-06-05 22:41:31,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:31,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:31,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:31,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 22:41:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:31,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643297130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:31,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:31,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:41:31,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448529558] [2021-06-05 22:41:31,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:41:31,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:41:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:41:31,776 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) [2021-06-05 22:41:32,036 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-05 22:41:32,712 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 22:41:34,018 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 22:41:34,233 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 22:41:34,410 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 22:41:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:34,421 INFO L93 Difference]: Finished difference Result 10621 states and 47146 transitions. [2021-06-05 22:41:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:41:34,422 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 [2021-06-05 22:41:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:34,446 INFO L225 Difference]: With dead ends: 10621 [2021-06-05 22:41:34,447 INFO L226 Difference]: Without dead ends: 10602 [2021-06-05 22:41:34,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2258.0ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:41:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10602 states. [2021-06-05 22:41:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10602 to 9615. [2021-06-05 22:41:34,600 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) [2021-06-05 22:41:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9615 states to 9615 states and 43195 transitions. [2021-06-05 22:41:34,628 INFO L78 Accepts]: Start accepts. Automaton has 9615 states and 43195 transitions. Word has length 33 [2021-06-05 22:41:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:34,628 INFO L482 AbstractCegarLoop]: Abstraction has 9615 states and 43195 transitions. [2021-06-05 22:41:34,628 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) [2021-06-05 22:41:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9615 states and 43195 transitions. [2021-06-05 22:41:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:34,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:34,645 INFO L554 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] [2021-06-05 22:41:34,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 22:41:34,845 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1229180108, now seen corresponding path program 25 times [2021-06-05 22:41:34,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:34,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662928746] [2021-06-05 22:41:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:35,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662928746] [2021-06-05 22:41:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662928746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343832583] [2021-06-05 22:41:35,073 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 [2021-06-05 22:41:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:35,271 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 [2021-06-05 22:41:35,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:35,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:35,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:35,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:41:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:35,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343832583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:35,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:35,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980051637] [2021-06-05 22:41:35,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:35,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:35,363 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) [2021-06-05 22:41:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:36,796 INFO L93 Difference]: Finished difference Result 10736 states and 47535 transitions. [2021-06-05 22:41:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:41:36,796 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 [2021-06-05 22:41:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:36,822 INFO L225 Difference]: With dead ends: 10736 [2021-06-05 22:41:36,822 INFO L226 Difference]: Without dead ends: 10721 [2021-06-05 22:41:36,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1156.1ms TimeCoverageRelationStatistics Valid=315, Invalid=1755, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:41:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2021-06-05 22:41:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 9625. [2021-06-05 22:41:36,996 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) [2021-06-05 22:41:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 43226 transitions. [2021-06-05 22:41:37,025 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 43226 transitions. Word has length 33 [2021-06-05 22:41:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:37,025 INFO L482 AbstractCegarLoop]: Abstraction has 9625 states and 43226 transitions. [2021-06-05 22:41:37,025 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) [2021-06-05 22:41:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 43226 transitions. [2021-06-05 22:41:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:37,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:37,042 INFO L554 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] [2021-06-05 22:41:37,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:37,243 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash -439213334, now seen corresponding path program 26 times [2021-06-05 22:41:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:37,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819104959] [2021-06-05 22:41:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:37,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819104959] [2021-06-05 22:41:37,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819104959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:37,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205750885] [2021-06-05 22:41:37,554 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 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 [2021-06-05 22:41:37,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:37,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:37,743 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 [2021-06-05 22:41:37,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:37,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:37,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:37,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 22:41:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:37,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205750885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:37,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:37,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:41:37,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335826138] [2021-06-05 22:41:37,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:41:37,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:41:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:41:37,948 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) [2021-06-05 22:41:38,311 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-05 22:41:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:39,812 INFO L93 Difference]: Finished difference Result 10394 states and 46174 transitions. [2021-06-05 22:41:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:39,813 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 [2021-06-05 22:41:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:39,837 INFO L225 Difference]: With dead ends: 10394 [2021-06-05 22:41:39,837 INFO L226 Difference]: Without dead ends: 10380 [2021-06-05 22:41:39,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1660.7ms TimeCoverageRelationStatistics Valid=372, Invalid=1698, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:41:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10380 states. [2021-06-05 22:41:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10380 to 9616. [2021-06-05 22:41:39,990 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) [2021-06-05 22:41:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 43196 transitions. [2021-06-05 22:41:40,018 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 43196 transitions. Word has length 33 [2021-06-05 22:41:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:40,018 INFO L482 AbstractCegarLoop]: Abstraction has 9616 states and 43196 transitions. [2021-06-05 22:41:40,018 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) [2021-06-05 22:41:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 43196 transitions. [2021-06-05 22:41:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:40,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:40,035 INFO L554 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] [2021-06-05 22:41:40,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 22:41:40,235 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:40,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1630053640, now seen corresponding path program 27 times [2021-06-05 22:41:40,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:40,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425363030] [2021-06-05 22:41:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:40,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:40,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425363030] [2021-06-05 22:41:40,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425363030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:40,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459985029] [2021-06-05 22:41:40,462 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 [2021-06-05 22:41:40,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:41:40,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:40,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:40,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:40,652 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 [2021-06-05 22:41:40,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:40,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:40,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:40,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 22:41:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:40,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459985029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:40,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:40,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:41:40,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104683376] [2021-06-05 22:41:40,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:41:40,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:41:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:41:40,872 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) [2021-06-05 22:41:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:42,639 INFO L93 Difference]: Finished difference Result 10434 states and 46309 transitions. [2021-06-05 22:41:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:42,639 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 [2021-06-05 22:41:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:42,663 INFO L225 Difference]: With dead ends: 10434 [2021-06-05 22:41:42,663 INFO L226 Difference]: Without dead ends: 10411 [2021-06-05 22:41:42,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1498.5ms TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:41:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10411 states. [2021-06-05 22:41:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10411 to 9567. [2021-06-05 22:41:42,822 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) [2021-06-05 22:41:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9567 states to 9567 states and 42976 transitions. [2021-06-05 22:41:42,849 INFO L78 Accepts]: Start accepts. Automaton has 9567 states and 42976 transitions. Word has length 33 [2021-06-05 22:41:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:42,850 INFO L482 AbstractCegarLoop]: Abstraction has 9567 states and 42976 transitions. [2021-06-05 22:41:42,850 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) [2021-06-05 22:41:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9567 states and 42976 transitions. [2021-06-05 22:41:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:42,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:42,866 INFO L554 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] [2021-06-05 22:41:43,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 22:41:43,067 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1268058332, now seen corresponding path program 28 times [2021-06-05 22:41:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:43,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976249857] [2021-06-05 22:41:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:43,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976249857] [2021-06-05 22:41:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976249857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7913251] [2021-06-05 22:41:43,292 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 [2021-06-05 22:41:43,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:43,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:43,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:43,496 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 [2021-06-05 22:41:43,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:43,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:43,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:43,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 22:41:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:43,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7913251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:43,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:43,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:43,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891932771] [2021-06-05 22:41:43,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:43,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:43,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:43,593 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) [2021-06-05 22:41:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:45,430 INFO L93 Difference]: Finished difference Result 10346 states and 46169 transitions. [2021-06-05 22:41:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:41:45,431 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 [2021-06-05 22:41:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:45,455 INFO L225 Difference]: With dead ends: 10346 [2021-06-05 22:41:45,455 INFO L226 Difference]: Without dead ends: 10331 [2021-06-05 22:41:45,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1471.3ms TimeCoverageRelationStatistics Valid=332, Invalid=2320, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:41:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-06-05 22:41:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 9573. [2021-06-05 22:41:45,605 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) [2021-06-05 22:41:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 42997 transitions. [2021-06-05 22:41:45,633 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 42997 transitions. Word has length 33 [2021-06-05 22:41:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:45,633 INFO L482 AbstractCegarLoop]: Abstraction has 9573 states and 42997 transitions. [2021-06-05 22:41:45,633 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) [2021-06-05 22:41:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 42997 transitions. [2021-06-05 22:41:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:45,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:45,650 INFO L554 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] [2021-06-05 22:41:45,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 22:41:45,850 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash -942316166, now seen corresponding path program 29 times [2021-06-05 22:41:45,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:45,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511889492] [2021-06-05 22:41:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:46,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:46,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511889492] [2021-06-05 22:41:46,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511889492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:46,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729766005] [2021-06-05 22:41:46,074 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 [2021-06-05 22:41:46,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:41:46,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:46,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:46,274 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 [2021-06-05 22:41:46,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:46,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:46,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:46,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:41:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:46,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729766005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:46,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:46,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:41:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129990989] [2021-06-05 22:41:46,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:46,359 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) [2021-06-05 22:41:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:47,920 INFO L93 Difference]: Finished difference Result 10632 states and 47132 transitions. [2021-06-05 22:41:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:41:47,920 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 [2021-06-05 22:41:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:47,947 INFO L225 Difference]: With dead ends: 10632 [2021-06-05 22:41:47,947 INFO L226 Difference]: Without dead ends: 10618 [2021-06-05 22:41:47,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1203.2ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:41:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2021-06-05 22:41:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 9549. [2021-06-05 22:41:48,113 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) [2021-06-05 22:41:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9549 states to 9549 states and 42887 transitions. [2021-06-05 22:41:48,140 INFO L78 Accepts]: Start accepts. Automaton has 9549 states and 42887 transitions. Word has length 33 [2021-06-05 22:41:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:48,140 INFO L482 AbstractCegarLoop]: Abstraction has 9549 states and 42887 transitions. [2021-06-05 22:41:48,140 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) [2021-06-05 22:41:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 9549 states and 42887 transitions. [2021-06-05 22:41:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:48,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:48,157 INFO L554 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] [2021-06-05 22:41:48,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:48,357 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1631225734, now seen corresponding path program 30 times [2021-06-05 22:41:48,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:48,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031139661] [2021-06-05 22:41:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:48,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:48,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031139661] [2021-06-05 22:41:48,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031139661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:48,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627076439] [2021-06-05 22:41:48,578 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 [2021-06-05 22:41:48,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:48,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:48,909 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:41:48,909 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 [2021-06-05 22:41:48,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:41:48,936 INFO L628 ElimStorePlain]: treesize reduction 62, result has 26.2 percent of original size [2021-06-05 22:41:48,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:48,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-05 22:41:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:49,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627076439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:49,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:49,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:41:49,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497805635] [2021-06-05 22:41:49,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:41:49,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:41:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:41:49,046 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) [2021-06-05 22:41:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:50,572 INFO L93 Difference]: Finished difference Result 10099 states and 45046 transitions. [2021-06-05 22:41:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:41:50,572 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 [2021-06-05 22:41:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:50,596 INFO L225 Difference]: With dead ends: 10099 [2021-06-05 22:41:50,596 INFO L226 Difference]: Without dead ends: 10084 [2021-06-05 22:41:50,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1185.1ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:41:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10084 states. [2021-06-05 22:41:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10084 to 9528. [2021-06-05 22:41:50,745 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) [2021-06-05 22:41:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 42780 transitions. [2021-06-05 22:41:50,774 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 42780 transitions. Word has length 33 [2021-06-05 22:41:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:50,774 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 42780 transitions. [2021-06-05 22:41:50,774 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) [2021-06-05 22:41:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 42780 transitions. [2021-06-05 22:41:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:50,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:50,791 INFO L554 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] [2021-06-05 22:41:50,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:50,991 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash 978067898, now seen corresponding path program 31 times [2021-06-05 22:41:50,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:50,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737009191] [2021-06-05 22:41:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:51,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:51,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737009191] [2021-06-05 22:41:51,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737009191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:51,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549689689] [2021-06-05 22:41:51,204 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 [2021-06-05 22:41:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:51,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:51,524 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 [2021-06-05 22:41:51,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:51,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:51,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:51,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-05 22:41:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:51,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549689689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:51,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:51,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:51,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323315508] [2021-06-05 22:41:51,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:51,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:51,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:51,591 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) [2021-06-05 22:41:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:52,967 INFO L93 Difference]: Finished difference Result 9976 states and 44626 transitions. [2021-06-05 22:41:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:41:52,968 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 [2021-06-05 22:41:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:52,991 INFO L225 Difference]: With dead ends: 9976 [2021-06-05 22:41:52,991 INFO L226 Difference]: Without dead ends: 9961 [2021-06-05 22:41:52,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1111.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:41:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-05 22:41:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 9528. [2021-06-05 22:41:53,134 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) [2021-06-05 22:41:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 42780 transitions. [2021-06-05 22:41:53,161 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 42780 transitions. Word has length 33 [2021-06-05 22:41:53,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:53,161 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 42780 transitions. [2021-06-05 22:41:53,161 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) [2021-06-05 22:41:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 42780 transitions. [2021-06-05 22:41:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:53,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:53,177 INFO L554 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] [2021-06-05 22:41:53,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 22:41:53,378 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:53,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:53,378 INFO L82 PathProgramCache]: Analyzing trace with hash 913434392, now seen corresponding path program 32 times [2021-06-05 22:41:53,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:53,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365366363] [2021-06-05 22:41:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:53,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:53,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365366363] [2021-06-05 22:41:53,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365366363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:53,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303622126] [2021-06-05 22:41:53,603 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 [2021-06-05 22:41:53,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:53,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:41:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:53,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:53,918 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 [2021-06-05 22:41:53,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:53,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:53,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:53,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:51 [2021-06-05 22:41:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:54,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303622126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:54,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:54,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:41:54,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259804553] [2021-06-05 22:41:54,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:41:54,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:41:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:41:54,067 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) [2021-06-05 22:41:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:54,965 INFO L93 Difference]: Finished difference Result 9838 states and 43930 transitions. [2021-06-05 22:41:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:41:54,965 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 [2021-06-05 22:41:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:54,988 INFO L225 Difference]: With dead ends: 9838 [2021-06-05 22:41:54,988 INFO L226 Difference]: Without dead ends: 9823 [2021-06-05 22:41:54,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:41:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-06-05 22:41:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 9501. [2021-06-05 22:41:55,131 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) [2021-06-05 22:41:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9501 states to 9501 states and 42659 transitions. [2021-06-05 22:41:55,158 INFO L78 Accepts]: Start accepts. Automaton has 9501 states and 42659 transitions. Word has length 33 [2021-06-05 22:41:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:55,158 INFO L482 AbstractCegarLoop]: Abstraction has 9501 states and 42659 transitions. [2021-06-05 22:41:55,158 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) [2021-06-05 22:41:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9501 states and 42659 transitions. [2021-06-05 22:41:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:55,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:55,175 INFO L554 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] [2021-06-05 22:41:55,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:55,375 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1290172674, now seen corresponding path program 33 times [2021-06-05 22:41:55,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:55,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646003137] [2021-06-05 22:41:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646003137] [2021-06-05 22:41:55,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646003137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027564812] [2021-06-05 22:41:55,615 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 [2021-06-05 22:41:55,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:41:55,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:41:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:55,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,939 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:41:55,940 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 [2021-06-05 22:41:55,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:41:55,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:55,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 22:41:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:56,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027564812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:56,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:56,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:41:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515897892] [2021-06-05 22:41:56,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:41:56,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:41:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:41:56,153 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) [2021-06-05 22:41:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:58,043 INFO L93 Difference]: Finished difference Result 10727 states and 47709 transitions. [2021-06-05 22:41:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:41:58,044 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 [2021-06-05 22:41:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:58,068 INFO L225 Difference]: With dead ends: 10727 [2021-06-05 22:41:58,069 INFO L226 Difference]: Without dead ends: 10708 [2021-06-05 22:41:58,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1720.7ms TimeCoverageRelationStatistics Valid=326, Invalid=2754, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:41:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-06-05 22:41:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 9629. [2021-06-05 22:41:58,239 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) [2021-06-05 22:41:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9629 states to 9629 states and 43250 transitions. [2021-06-05 22:41:58,269 INFO L78 Accepts]: Start accepts. Automaton has 9629 states and 43250 transitions. Word has length 33 [2021-06-05 22:41:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:58,269 INFO L482 AbstractCegarLoop]: Abstraction has 9629 states and 43250 transitions. [2021-06-05 22:41:58,269 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) [2021-06-05 22:41:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 9629 states and 43250 transitions. [2021-06-05 22:41:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:41:58,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:58,287 INFO L554 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] [2021-06-05 22:41:58,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 22:41:58,488 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:58,488 INFO L82 PathProgramCache]: Analyzing trace with hash 132182152, now seen corresponding path program 34 times [2021-06-05 22:41:58,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:58,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708317164] [2021-06-05 22:41:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:58,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708317164] [2021-06-05 22:41:58,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708317164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267674401] [2021-06-05 22:41:58,722 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 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 [2021-06-05 22:41:58,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:58,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:58,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:58,920 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 [2021-06-05 22:41:58,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:58,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:58,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:58,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:41:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:59,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267674401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:59,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:59,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:59,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562625590] [2021-06-05 22:41:59,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:59,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:59,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:59,009 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) [2021-06-05 22:42:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:00,407 INFO L93 Difference]: Finished difference Result 11520 states and 50652 transitions. [2021-06-05 22:42:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:42:00,408 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 [2021-06-05 22:42:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:00,434 INFO L225 Difference]: With dead ends: 11520 [2021-06-05 22:42:00,434 INFO L226 Difference]: Without dead ends: 11496 [2021-06-05 22:42:00,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1215.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:42:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-06-05 22:42:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9758. [2021-06-05 22:42:00,611 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) [2021-06-05 22:42:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9758 states to 9758 states and 43843 transitions. [2021-06-05 22:42:00,639 INFO L78 Accepts]: Start accepts. Automaton has 9758 states and 43843 transitions. Word has length 33 [2021-06-05 22:42:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:00,639 INFO L482 AbstractCegarLoop]: Abstraction has 9758 states and 43843 transitions. [2021-06-05 22:42:00,639 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) [2021-06-05 22:42:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 9758 states and 43843 transitions. [2021-06-05 22:42:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:00,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:00,656 INFO L554 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] [2021-06-05 22:42:00,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 22:42:00,856 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1536211290, now seen corresponding path program 35 times [2021-06-05 22:42:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:00,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028067348] [2021-06-05 22:42:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:01,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028067348] [2021-06-05 22:42:01,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028067348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052871845] [2021-06-05 22:42:01,088 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 [2021-06-05 22:42:01,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:42:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:01,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,283 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 28 treesize of output 12 [2021-06-05 22:42:01,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:01,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 22:42:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052871845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:01,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:42:01,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001720312] [2021-06-05 22:42:01,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:01,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:01,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:01,365 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) [2021-06-05 22:42:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:02,791 INFO L93 Difference]: Finished difference Result 11492 states and 50585 transitions. [2021-06-05 22:42:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:42:02,791 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 [2021-06-05 22:42:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:02,821 INFO L225 Difference]: With dead ends: 11492 [2021-06-05 22:42:02,821 INFO L226 Difference]: Without dead ends: 11455 [2021-06-05 22:42:02,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1173.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:42:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11455 states. [2021-06-05 22:42:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11455 to 9717. [2021-06-05 22:42:03,000 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) [2021-06-05 22:42:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9717 states to 9717 states and 43665 transitions. [2021-06-05 22:42:03,027 INFO L78 Accepts]: Start accepts. Automaton has 9717 states and 43665 transitions. Word has length 33 [2021-06-05 22:42:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:03,027 INFO L482 AbstractCegarLoop]: Abstraction has 9717 states and 43665 transitions. [2021-06-05 22:42:03,027 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) [2021-06-05 22:42:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9717 states and 43665 transitions. [2021-06-05 22:42:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:03,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:03,044 INFO L554 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] [2021-06-05 22:42:03,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 22:42:03,245 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:03,245 INFO L82 PathProgramCache]: Analyzing trace with hash 171060376, now seen corresponding path program 36 times [2021-06-05 22:42:03,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:03,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103870778] [2021-06-05 22:42:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:03,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:03,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103870778] [2021-06-05 22:42:03,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103870778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:03,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772404753] [2021-06-05 22:42:03,488 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 [2021-06-05 22:42:03,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:42:03,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:03,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:42:03,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:03,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:03,748 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 [2021-06-05 22:42:03,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:03,810 INFO L628 ElimStorePlain]: treesize reduction 57, result has 55.5 percent of original size [2021-06-05 22:42:03,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:03,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:71 [2021-06-05 22:42:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772404753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:04,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:04,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:42:04,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024340113] [2021-06-05 22:42:04,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:42:04,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:42:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:04,068 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) [2021-06-05 22:42:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:06,277 INFO L93 Difference]: Finished difference Result 10441 states and 46614 transitions. [2021-06-05 22:42:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:42:06,278 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 [2021-06-05 22:42:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:06,303 INFO L225 Difference]: With dead ends: 10441 [2021-06-05 22:42:06,303 INFO L226 Difference]: Without dead ends: 10426 [2021-06-05 22:42:06,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1983.6ms TimeCoverageRelationStatistics Valid=280, Invalid=2690, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:42:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2021-06-05 22:42:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 9699. [2021-06-05 22:42:06,453 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) [2021-06-05 22:42:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 43587 transitions. [2021-06-05 22:42:06,481 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 43587 transitions. Word has length 33 [2021-06-05 22:42:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:06,481 INFO L482 AbstractCegarLoop]: Abstraction has 9699 states and 43587 transitions. [2021-06-05 22:42:06,481 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) [2021-06-05 22:42:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 43587 transitions. [2021-06-05 22:42:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:06,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:06,498 INFO L554 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] [2021-06-05 22:42:06,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 22:42:06,709 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 534227778, now seen corresponding path program 37 times [2021-06-05 22:42:06,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:06,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226381842] [2021-06-05 22:42:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:06,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:06,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226381842] [2021-06-05 22:42:06,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226381842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:06,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458407169] [2021-06-05 22:42:06,936 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 [2021-06-05 22:42:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:06,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,181 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 [2021-06-05 22:42:07,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:07,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-06-05 22:42:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:07,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458407169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:07,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:07,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:42:07,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103616271] [2021-06-05 22:42:07,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:07,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:07,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:07,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:07,251 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) [2021-06-05 22:42:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:08,937 INFO L93 Difference]: Finished difference Result 10417 states and 46552 transitions. [2021-06-05 22:42:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:42:08,937 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 [2021-06-05 22:42:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:08,963 INFO L225 Difference]: With dead ends: 10417 [2021-06-05 22:42:08,963 INFO L226 Difference]: Without dead ends: 10402 [2021-06-05 22:42:08,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1266.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:42:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2021-06-05 22:42:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 9699. [2021-06-05 22:42:09,116 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) [2021-06-05 22:42:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 43587 transitions. [2021-06-05 22:42:09,144 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 43587 transitions. Word has length 33 [2021-06-05 22:42:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:09,145 INFO L482 AbstractCegarLoop]: Abstraction has 9699 states and 43587 transitions. [2021-06-05 22:42:09,145 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) [2021-06-05 22:42:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 43587 transitions. [2021-06-05 22:42:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:09,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:09,162 INFO L554 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] [2021-06-05 22:42:09,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:09,362 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash 968257124, now seen corresponding path program 38 times [2021-06-05 22:42:09,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:09,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626177449] [2021-06-05 22:42:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:09,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:09,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626177449] [2021-06-05 22:42:09,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626177449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:09,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576187769] [2021-06-05 22:42:09,678 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 [2021-06-05 22:42:09,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:09,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:42:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:09,931 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 [2021-06-05 22:42:09,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:09,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:09,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:09,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:42 [2021-06-05 22:42:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:10,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576187769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:10,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:10,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:42:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050140358] [2021-06-05 22:42:10,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:42:10,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:10,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:42:10,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:10,115 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) [2021-06-05 22:42:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:11,377 INFO L93 Difference]: Finished difference Result 10293 states and 45958 transitions. [2021-06-05 22:42:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:42:11,377 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 [2021-06-05 22:42:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:11,401 INFO L225 Difference]: With dead ends: 10293 [2021-06-05 22:42:11,401 INFO L226 Difference]: Without dead ends: 10278 [2021-06-05 22:42:11,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1045.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:42:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-06-05 22:42:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 9675. [2021-06-05 22:42:11,555 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) [2021-06-05 22:42:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9675 states to 9675 states and 43482 transitions. [2021-06-05 22:42:11,583 INFO L78 Accepts]: Start accepts. Automaton has 9675 states and 43482 transitions. Word has length 33 [2021-06-05 22:42:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:11,583 INFO L482 AbstractCegarLoop]: Abstraction has 9675 states and 43482 transitions. [2021-06-05 22:42:11,583 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) [2021-06-05 22:42:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9675 states and 43482 transitions. [2021-06-05 22:42:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:11,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:11,600 INFO L554 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] [2021-06-05 22:42:11,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:11,800 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1134233474, now seen corresponding path program 39 times [2021-06-05 22:42:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143623191] [2021-06-05 22:42:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:12,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:12,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143623191] [2021-06-05 22:42:12,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143623191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:12,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006847944] [2021-06-05 22:42:12,120 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 [2021-06-05 22:42:12,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:42:12,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:42:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:12,334 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 [2021-06-05 22:42:12,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:12,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:12,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:12,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 22:42:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:12,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006847944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:12,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:12,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:42:12,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260865529] [2021-06-05 22:42:12,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:12,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:12,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:12,565 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) [2021-06-05 22:42:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:14,057 INFO L93 Difference]: Finished difference Result 10488 states and 46759 transitions. [2021-06-05 22:42:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:42:14,057 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 [2021-06-05 22:42:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:14,083 INFO L225 Difference]: With dead ends: 10488 [2021-06-05 22:42:14,084 INFO L226 Difference]: Without dead ends: 10469 [2021-06-05 22:42:14,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1467.6ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:42:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10469 states. [2021-06-05 22:42:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10469 to 9776. [2021-06-05 22:42:14,302 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) [2021-06-05 22:42:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9776 states to 9776 states and 43935 transitions. [2021-06-05 22:42:14,330 INFO L78 Accepts]: Start accepts. Automaton has 9776 states and 43935 transitions. Word has length 33 [2021-06-05 22:42:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:14,330 INFO L482 AbstractCegarLoop]: Abstraction has 9776 states and 43935 transitions. [2021-06-05 22:42:14,330 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) [2021-06-05 22:42:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9776 states and 43935 transitions. [2021-06-05 22:42:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:14,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:14,348 INFO L554 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] [2021-06-05 22:42:14,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 22:42:14,548 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1738378996, now seen corresponding path program 40 times [2021-06-05 22:42:14,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:14,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812985888] [2021-06-05 22:42:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:14,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:14,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812985888] [2021-06-05 22:42:14,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812985888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:14,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299950556] [2021-06-05 22:42:14,874 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 [2021-06-05 22:42:14,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:14,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:14,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:15,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,076 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 [2021-06-05 22:42:15,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:15,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:15,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:15,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:42:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:15,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299950556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:15,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:15,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:42:15,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181928592] [2021-06-05 22:42:15,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:15,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:15,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:15,186 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) [2021-06-05 22:42:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:16,491 INFO L93 Difference]: Finished difference Result 11073 states and 48968 transitions. [2021-06-05 22:42:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:42:16,491 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 [2021-06-05 22:42:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:16,517 INFO L225 Difference]: With dead ends: 11073 [2021-06-05 22:42:16,517 INFO L226 Difference]: Without dead ends: 11049 [2021-06-05 22:42:16,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1284.4ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:42:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2021-06-05 22:42:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 9893. [2021-06-05 22:42:16,690 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) [2021-06-05 22:42:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 44463 transitions. [2021-06-05 22:42:16,718 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 44463 transitions. Word has length 33 [2021-06-05 22:42:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:16,718 INFO L482 AbstractCegarLoop]: Abstraction has 9893 states and 44463 transitions. [2021-06-05 22:42:16,719 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) [2021-06-05 22:42:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 44463 transitions. [2021-06-05 22:42:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:16,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:16,735 INFO L554 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] [2021-06-05 22:42:16,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-05 22:42:16,936 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 888194858, now seen corresponding path program 41 times [2021-06-05 22:42:16,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:16,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222266025] [2021-06-05 22:42:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222266025] [2021-06-05 22:42:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222266025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673312835] [2021-06-05 22:42:17,189 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 [2021-06-05 22:42:17,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:42:17,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:17,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:17,356 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 [2021-06-05 22:42:17,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:17,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:42:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673312835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:17,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:42:17,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398256796] [2021-06-05 22:42:17,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:17,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:17,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:17,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:17,457 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) [2021-06-05 22:42:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:18,906 INFO L93 Difference]: Finished difference Result 11045 states and 48901 transitions. [2021-06-05 22:42:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:42:18,906 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 [2021-06-05 22:42:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:18,932 INFO L225 Difference]: With dead ends: 11045 [2021-06-05 22:42:18,932 INFO L226 Difference]: Without dead ends: 11008 [2021-06-05 22:42:18,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1232.8ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:42:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2021-06-05 22:42:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 9750. [2021-06-05 22:42:19,098 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) [2021-06-05 22:42:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9750 states to 9750 states and 43837 transitions. [2021-06-05 22:42:19,127 INFO L78 Accepts]: Start accepts. Automaton has 9750 states and 43837 transitions. Word has length 33 [2021-06-05 22:42:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:19,127 INFO L482 AbstractCegarLoop]: Abstraction has 9750 states and 43837 transitions. [2021-06-05 22:42:19,127 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) [2021-06-05 22:42:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 9750 states and 43837 transitions. [2021-06-05 22:42:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:19,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:19,145 INFO L554 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] [2021-06-05 22:42:19,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 22:42:19,345 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:19,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1699500772, now seen corresponding path program 42 times [2021-06-05 22:42:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:19,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64812668] [2021-06-05 22:42:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:19,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:19,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64812668] [2021-06-05 22:42:19,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64812668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:19,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228189100] [2021-06-05 22:42:19,602 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 [2021-06-05 22:42:19,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:42:19,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:19,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:19,824 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:42:19,824 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 [2021-06-05 22:42:19,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:19,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:19,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:19,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 22:42:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:20,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228189100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:20,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:20,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:42:20,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957871154] [2021-06-05 22:42:20,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:42:20,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:20,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:42:20,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:20,082 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) [2021-06-05 22:42:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:22,186 INFO L93 Difference]: Finished difference Result 10276 states and 45971 transitions. [2021-06-05 22:42:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:42:22,187 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 [2021-06-05 22:42:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:22,212 INFO L225 Difference]: With dead ends: 10276 [2021-06-05 22:42:22,212 INFO L226 Difference]: Without dead ends: 10261 [2021-06-05 22:42:22,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1710.7ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:42:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2021-06-05 22:42:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9729. [2021-06-05 22:42:22,365 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) [2021-06-05 22:42:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 43749 transitions. [2021-06-05 22:42:22,392 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 43749 transitions. Word has length 33 [2021-06-05 22:42:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:22,392 INFO L482 AbstractCegarLoop]: Abstraction has 9729 states and 43749 transitions. [2021-06-05 22:42:22,392 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) [2021-06-05 22:42:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 43749 transitions. [2021-06-05 22:42:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:22,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:22,409 INFO L554 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] [2021-06-05 22:42:22,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 22:42:22,609 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:22,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1231415870, now seen corresponding path program 43 times [2021-06-05 22:42:22,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:22,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384782317] [2021-06-05 22:42:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:22,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:22,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384782317] [2021-06-05 22:42:22,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384782317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:22,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436050649] [2021-06-05 22:42:22,871 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 [2021-06-05 22:42:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:22,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:23,037 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 [2021-06-05 22:42:23,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:23,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 22:42:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:23,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436050649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:23,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:23,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:42:23,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896404315] [2021-06-05 22:42:23,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:23,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:23,221 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) [2021-06-05 22:42:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:25,206 INFO L93 Difference]: Finished difference Result 11677 states and 51380 transitions. [2021-06-05 22:42:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:42:25,207 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 [2021-06-05 22:42:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:25,234 INFO L225 Difference]: With dead ends: 11677 [2021-06-05 22:42:25,234 INFO L226 Difference]: Without dead ends: 11639 [2021-06-05 22:42:25,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1811.0ms TimeCoverageRelationStatistics Valid=472, Invalid=2834, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:42:25,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11639 states. [2021-06-05 22:42:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11639 to 9953. [2021-06-05 22:42:25,412 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) [2021-06-05 22:42:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9953 states to 9953 states and 44740 transitions. [2021-06-05 22:42:25,441 INFO L78 Accepts]: Start accepts. Automaton has 9953 states and 44740 transitions. Word has length 33 [2021-06-05 22:42:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:25,441 INFO L482 AbstractCegarLoop]: Abstraction has 9953 states and 44740 transitions. [2021-06-05 22:42:25,441 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) [2021-06-05 22:42:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9953 states and 44740 transitions. [2021-06-05 22:42:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:25,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:25,459 INFO L554 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] [2021-06-05 22:42:25,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:25,660 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:25,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1641196600, now seen corresponding path program 44 times [2021-06-05 22:42:25,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:25,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321515191] [2021-06-05 22:42:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:25,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:25,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321515191] [2021-06-05 22:42:25,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321515191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:25,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366068582] [2021-06-05 22:42:25,916 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 [2021-06-05 22:42:25,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:26,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:26,080 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 [2021-06-05 22:42:26,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:26,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:42:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:26,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366068582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:26,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:26,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:42:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667823251] [2021-06-05 22:42:26,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:42:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:42:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:26,318 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) [2021-06-05 22:42:26,449 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-05 22:42:26,580 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-06-05 22:42:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:28,341 INFO L93 Difference]: Finished difference Result 11227 states and 49454 transitions. [2021-06-05 22:42:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:42:28,342 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 [2021-06-05 22:42:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:28,368 INFO L225 Difference]: With dead ends: 11227 [2021-06-05 22:42:28,368 INFO L226 Difference]: Without dead ends: 11205 [2021-06-05 22:42:28,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1890.4ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:42:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-06-05 22:42:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 10046. [2021-06-05 22:42:28,550 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) [2021-06-05 22:42:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10046 states to 10046 states and 45136 transitions. [2021-06-05 22:42:28,578 INFO L78 Accepts]: Start accepts. Automaton has 10046 states and 45136 transitions. Word has length 33 [2021-06-05 22:42:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:28,578 INFO L482 AbstractCegarLoop]: Abstraction has 10046 states and 45136 transitions. [2021-06-05 22:42:28,578 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) [2021-06-05 22:42:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10046 states and 45136 transitions. [2021-06-05 22:42:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:28,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:28,595 INFO L554 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] [2021-06-05 22:42:28,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:28,796 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2086298620, now seen corresponding path program 45 times [2021-06-05 22:42:28,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:28,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261661224] [2021-06-05 22:42:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:29,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:29,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261661224] [2021-06-05 22:42:29,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261661224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:29,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537942803] [2021-06-05 22:42:29,054 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 [2021-06-05 22:42:29,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:42:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:29,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:29,219 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 [2021-06-05 22:42:29,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:29,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:29,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:29,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:42:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:29,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537942803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:29,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:29,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:42:29,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35239417] [2021-06-05 22:42:29,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:42:29,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:42:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:29,483 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) [2021-06-05 22:42:29,669 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 22:42:29,841 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 22:42:30,102 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 22:42:31,398 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 22:42:31,554 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-06-05 22:42:31,686 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-06-05 22:42:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:31,697 INFO L93 Difference]: Finished difference Result 10886 states and 48404 transitions. [2021-06-05 22:42:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:42:31,697 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 [2021-06-05 22:42:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:31,722 INFO L225 Difference]: With dead ends: 10886 [2021-06-05 22:42:31,723 INFO L226 Difference]: Without dead ends: 10871 [2021-06-05 22:42:31,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 2116.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:42:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-06-05 22:42:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10037. [2021-06-05 22:42:31,881 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) [2021-06-05 22:42:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10037 states to 10037 states and 45109 transitions. [2021-06-05 22:42:32,010 INFO L78 Accepts]: Start accepts. Automaton has 10037 states and 45109 transitions. Word has length 33 [2021-06-05 22:42:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:32,010 INFO L482 AbstractCegarLoop]: Abstraction has 10037 states and 45109 transitions. [2021-06-05 22:42:32,010 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) [2021-06-05 22:42:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 10037 states and 45109 transitions. [2021-06-05 22:42:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:32,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:32,028 INFO L554 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] [2021-06-05 22:42:32,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 22:42:32,229 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash 428070374, now seen corresponding path program 46 times [2021-06-05 22:42:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:32,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447522987] [2021-06-05 22:42:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:32,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:32,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447522987] [2021-06-05 22:42:32,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447522987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:32,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654791761] [2021-06-05 22:42:32,484 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 [2021-06-05 22:42:32,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:32,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:32,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:42:32,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:32,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:32,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:32,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:42:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:32,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654791761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:32,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:32,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:42:32,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123914412] [2021-06-05 22:42:32,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:32,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:32,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:32,758 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) [2021-06-05 22:42:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:34,382 INFO L93 Difference]: Finished difference Result 11430 states and 50387 transitions. [2021-06-05 22:42:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:42:34,382 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 [2021-06-05 22:42:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:34,409 INFO L225 Difference]: With dead ends: 11430 [2021-06-05 22:42:34,409 INFO L226 Difference]: Without dead ends: 11396 [2021-06-05 22:42:34,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1415.5ms TimeCoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:42:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11396 states. [2021-06-05 22:42:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11396 to 9986. [2021-06-05 22:42:34,600 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) [2021-06-05 22:42:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 44892 transitions. [2021-06-05 22:42:34,629 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 44892 transitions. Word has length 33 [2021-06-05 22:42:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:34,629 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 44892 transitions. [2021-06-05 22:42:34,630 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) [2021-06-05 22:42:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 44892 transitions. [2021-06-05 22:42:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:34,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:34,647 INFO L554 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] [2021-06-05 22:42:34,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:34,848 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash 53715198, now seen corresponding path program 47 times [2021-06-05 22:42:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:34,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650663249] [2021-06-05 22:42:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:35,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:35,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650663249] [2021-06-05 22:42:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650663249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:35,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157647821] [2021-06-05 22:42:35,118 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 [2021-06-05 22:42:35,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:35,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:35,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:42:35,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:35,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:35,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:35,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 22:42:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:35,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157647821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:35,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:35,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:42:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079284914] [2021-06-05 22:42:35,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:35,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:35,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:35,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:35,404 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) Received shutdown request... [2021-06-05 22:42:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:42:36,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-05 22:42:36,971 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:42:36,972 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (5/5) [2021-06-05 22:42:36,973 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:42:36,975 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:42:36,975 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:42:36 BasicIcfg [2021-06-05 22:42:36,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:42:36,976 INFO L168 Benchmark]: Toolchain (without parser) took 771369.13 ms. Allocated memory was 398.5 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 377.7 MB in the beginning and 1.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 224.6 MB. Max. memory is 16.0 GB. [2021-06-05 22:42:36,976 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 398.5 MB. Free memory was 378.9 MB in the beginning and 378.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:42:36,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.67 ms. Allocated memory is still 398.5 MB. Free memory was 377.6 MB in the beginning and 376.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:42:36,976 INFO L168 Benchmark]: Boogie Preprocessor took 30.96 ms. Allocated memory is still 398.5 MB. Free memory was 376.1 MB in the beginning and 375.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:42:36,976 INFO L168 Benchmark]: RCFGBuilder took 360.01 ms. Allocated memory is still 398.5 MB. Free memory was 375.0 MB in the beginning and 358.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-06-05 22:42:36,976 INFO L168 Benchmark]: TraceAbstraction took 770938.25 ms. Allocated memory was 398.5 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 357.8 MB in the beginning and 1.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 205.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:42:36,976 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 0.13 ms. Allocated memory is still 398.5 MB. Free memory was 378.9 MB in the beginning and 378.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 35.67 ms. Allocated memory is still 398.5 MB. Free memory was 377.6 MB in the beginning and 376.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.96 ms. Allocated memory is still 398.5 MB. Free memory was 376.1 MB in the beginning and 375.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 360.01 ms. Allocated memory is still 398.5 MB. Free memory was 375.0 MB in the beginning and 358.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 770938.25 ms. Allocated memory was 398.5 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 357.8 MB in the beginning and 1.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 205.7 MB. Max. memory is 16.0 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 (9986states) and FLOYD_HOARE automaton (currently 30 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (4449 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: 88.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 23.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 62.5ms, 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: 23.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.1ms, 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: 22.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.3ms, 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: 29.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.9ms, 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: 770532.7ms, OverallIterations: 347, TraceHistogramMax: 2, EmptinessCheckTime: 3824.5ms, AutomataDifference: 483842.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 43424 SDtfs, 145675 SDslu, 553104 SDs, 0 SdLazy, 358241 SolverSat, 25066 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 142679.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21713 GetRequests, 7327 SyntacticMatches, 753 SemanticMatches, 13633 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159775 ImplicationChecksByTransitivity, 400351.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10046occurred in iteration=344, InterpolantAutomatonStates: 11166, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41036.6ms AutomataMinimizationTime, 346 MinimizatonAttempts, 293026 StatesRemovedByMinimization, 346 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2619.3ms SsaConstructionTime, 5597.2ms SatisfiabilityAnalysisTime, 155127.6ms InterpolantComputationTime, 21905 NumberOfCodeBlocks, 21905 NumberOfCodeBlocksAsserted, 1134 NumberOfCheckSat, 21214 ConstructedInterpolants, 35 QuantifiedInterpolants, 385965 SizeOfPredicates, 4323 NumberOfNonLiveVariables, 47315 ConjunctsInSsa, 12626 ConjunctsInUnsatCore, 691 InterpolantComputations, 5 PerfectInterpolantSequences, 40/3999 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