/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:09:50,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:09:50,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:09:50,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:09:50,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:09:50,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:09:50,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:09:50,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:09:50,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:09:50,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:09:50,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:09:50,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:09:50,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:09:50,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:09:50,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:09:50,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:09:50,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:09:50,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:09:50,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:09:50,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:09:50,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:09:50,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:09:50,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:09:50,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:09:50,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:09:50,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:09:50,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:09:50,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:09:50,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:09:50,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 18:09:50,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:09:50,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:09:50,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:09:50,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:09:50,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:09:50,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:09:50,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:09:50,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:09:50,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:09:50,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:09:50,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:09:50,784 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 [2021-07-09 18:09:50,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:09:50,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:09:50,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:09:50,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:09:50,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:09:50,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:09:50,825 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:09:50,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:09:50,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:09:50,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:09:50,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:09:50,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:09:50,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:09:50,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:09:50,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:09:50,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:09:50,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:09:50,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:09:50,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:09:50,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:09:50,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:09:50,828 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:09:50,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:09:50,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:09:51,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:09:51,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:09:51,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:09:51,117 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:09:51,119 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:09:51,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-07-09 18:09:51,119 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-07-09 18:09:51,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:09:51,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:09:51,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:09:51,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:09:51,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:09:51,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:09:51,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:09:51,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:09:51,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:09:51,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/1) ... [2021-07-09 18:09:51,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:09:51,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:09:51,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:09:51,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:09:51,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (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 [2021-07-09 18:09:51,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:09:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:09:51,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:09:51,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:09:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:09:51,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:09:51,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:09:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:09:51,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:09:51,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:09:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:09:51,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:09:51,286 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:09:51,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:09:51,542 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:09:51,543 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:09:51 BoogieIcfgContainer [2021-07-09 18:09:51,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:09:51,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:09:51,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:09:51,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:09:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:09:51" (1/2) ... [2021-07-09 18:09:51,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678dacfc and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:09:51, skipping insertion in model container [2021-07-09 18:09:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:09:51" (2/2) ... [2021-07-09 18:09:51,548 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-07-09 18:09:51,552 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:09:51,552 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:09:51,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:09:51,552 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:09:51,588 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:09:51,605 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:09:51,628 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:09:51,628 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:09:51,628 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:09:51,629 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:09:51,629 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:09:51,630 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:09:51,630 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:09:51,630 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:09:51,640 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-07-09 18:09:51,666 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 136 states, 135 states have (on average 2.7925925925925927) internal successors, (377), 135 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 135 states have (on average 2.7925925925925927) internal successors, (377), 135 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:09:51,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:51,679 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:51,680 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:51,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-07-09 18:09:51,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:51,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638659579] [2021-07-09 18:09:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:51,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:51,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638659579] [2021-07-09 18:09:51,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638659579] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:09:51,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:09:51,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:09:51,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402154249] [2021-07-09 18:09:51,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:09:51,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:09:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:09:51,835 INFO L87 Difference]: Start difference. First operand has 136 states, 135 states have (on average 2.7925925925925927) internal successors, (377), 135 states have internal predecessors, (377), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:51,894 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-07-09 18:09:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:09:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:09:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:51,909 INFO L225 Difference]: With dead ends: 186 [2021-07-09 18:09:51,909 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 18:09:51,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:09:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 18:09:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-07-09 18:09:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.81875) internal successors, (451), 160 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-07-09 18:09:51,961 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-07-09 18:09:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:51,962 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-07-09 18:09:51,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-07-09 18:09:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:09:51,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:51,963 INFO L508 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] [2021-07-09 18:09:51,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:09:51,964 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash -482972628, now seen corresponding path program 1 times [2021-07-09 18:09:51,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:51,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295371539] [2021-07-09 18:09:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:51,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:51,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295371539] [2021-07-09 18:09:51,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295371539] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:09:51,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:09:51,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:09:51,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412060866] [2021-07-09 18:09:51,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:09:51,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:09:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:09:51,989 INFO L87 Difference]: Start difference. First operand 161 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:52,012 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-07-09 18:09:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:09:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:09:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:52,013 INFO L225 Difference]: With dead ends: 151 [2021-07-09 18:09:52,013 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 18:09:52,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:09:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 18:09:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-07-09 18:09:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-07-09 18:09:52,020 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-07-09 18:09:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:52,020 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-07-09 18:09:52,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-07-09 18:09:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:09:52,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:52,021 INFO L508 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] [2021-07-09 18:09:52,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:09:52,022 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1326570477, now seen corresponding path program 1 times [2021-07-09 18:09:52,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:52,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101028271] [2021-07-09 18:09:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:52,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:52,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101028271] [2021-07-09 18:09:52,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101028271] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:09:52,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:09:52,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:09:52,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623541730] [2021-07-09 18:09:52,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:09:52,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:09:52,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:09:52,060 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:52,095 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-07-09 18:09:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:09:52,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:09:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:52,097 INFO L225 Difference]: With dead ends: 223 [2021-07-09 18:09:52,097 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 18:09:52,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:09:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 18:09:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-07-09 18:09:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-07-09 18:09:52,106 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-07-09 18:09:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:52,106 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-07-09 18:09:52,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-07-09 18:09:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:09:52,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:52,108 INFO L508 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] [2021-07-09 18:09:52,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:09:52,108 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash 724535793, now seen corresponding path program 1 times [2021-07-09 18:09:52,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:52,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301167860] [2021-07-09 18:09:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:09:52,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:52,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301167860] [2021-07-09 18:09:52,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301167860] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:09:52,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:09:52,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:09:52,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278915931] [2021-07-09 18:09:52,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:09:52,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:09:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:09:52,144 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:52,176 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-07-09 18:09:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:09:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:09:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:52,178 INFO L225 Difference]: With dead ends: 344 [2021-07-09 18:09:52,178 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 18:09:52,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:09:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 18:09:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-07-09 18:09:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-07-09 18:09:52,195 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-07-09 18:09:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:52,195 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-07-09 18:09:52,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-07-09 18:09:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:09:52,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:52,197 INFO L508 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] [2021-07-09 18:09:52,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:09:52,197 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash -7298993, now seen corresponding path program 2 times [2021-07-09 18:09:52,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:52,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289112239] [2021-07-09 18:09:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:52,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289112239] [2021-07-09 18:09:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289112239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938513134] [2021-07-09 18:09:52,270 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 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 [2021-07-09 18:09:52,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:52,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:09:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938513134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:09:52,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805029669] [2021-07-09 18:09:52,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:09:52,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:09:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:09:52,592 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:53,131 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-07-09 18:09:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:09:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:09:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:53,134 INFO L225 Difference]: With dead ends: 545 [2021-07-09 18:09:53,134 INFO L226 Difference]: Without dead ends: 545 [2021-07-09 18:09:53,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:53,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-09 18:09:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-07-09 18:09:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-07-09 18:09:53,148 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-07-09 18:09:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:53,148 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-07-09 18:09:53,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-07-09 18:09:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:09:53,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:53,150 INFO L508 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] [2021-07-09 18:09:53,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:53,365 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1439495847, now seen corresponding path program 3 times [2021-07-09 18:09:53,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:53,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176138036] [2021-07-09 18:09:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:53,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:53,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176138036] [2021-07-09 18:09:53,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176138036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65743831] [2021-07-09 18:09:53,449 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 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 [2021-07-09 18:09:53,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:09:53,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:09:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:53,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65743831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:53,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:53,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 18:09:53,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252992166] [2021-07-09 18:09:53,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:09:53,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:53,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:09:53,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:09:53,557 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:53,707 INFO L93 Difference]: Finished difference Result 582 states and 1706 transitions. [2021-07-09 18:09:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:09:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:09:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:53,717 INFO L225 Difference]: With dead ends: 582 [2021-07-09 18:09:53,717 INFO L226 Difference]: Without dead ends: 582 [2021-07-09 18:09:53,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:09:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-09 18:09:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 419. [2021-07-09 18:09:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0598086124401913) internal successors, (1279), 418 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1279 transitions. [2021-07-09 18:09:53,729 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1279 transitions. Word has length 30 [2021-07-09 18:09:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:53,730 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1279 transitions. [2021-07-09 18:09:53,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1279 transitions. [2021-07-09 18:09:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:09:53,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:53,732 INFO L508 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] [2021-07-09 18:09:53,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:09:53,949 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1671223453, now seen corresponding path program 4 times [2021-07-09 18:09:53,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:53,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553648473] [2021-07-09 18:09:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:54,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553648473] [2021-07-09 18:09:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553648473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383182203] [2021-07-09 18:09:54,030 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 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 [2021-07-09 18:09:54,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:54,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:09:54,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:54,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383182203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:54,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:54,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 18:09:54,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435461924] [2021-07-09 18:09:54,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:09:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:09:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:09:54,152 INFO L87 Difference]: Start difference. First operand 419 states and 1279 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:54,270 INFO L93 Difference]: Finished difference Result 881 states and 2675 transitions. [2021-07-09 18:09:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:09:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:09:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:54,275 INFO L225 Difference]: With dead ends: 881 [2021-07-09 18:09:54,275 INFO L226 Difference]: Without dead ends: 881 [2021-07-09 18:09:54,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:09:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-07-09 18:09:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 665. [2021-07-09 18:09:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 3.1490963855421685) internal successors, (2091), 664 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2091 transitions. [2021-07-09 18:09:54,290 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2091 transitions. Word has length 30 [2021-07-09 18:09:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:54,291 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 2091 transitions. [2021-07-09 18:09:54,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2091 transitions. [2021-07-09 18:09:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:09:54,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:54,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:54,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 18:09:54,507 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1167739173, now seen corresponding path program 5 times [2021-07-09 18:09:54,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:54,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859623098] [2021-07-09 18:09:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:54,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859623098] [2021-07-09 18:09:54,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859623098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880772651] [2021-07-09 18:09:54,628 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 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 [2021-07-09 18:09:54,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:09:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:54,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:09:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:54,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880772651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:54,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:54,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:09:54,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119957391] [2021-07-09 18:09:54,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:09:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:09:54,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:09:54,848 INFO L87 Difference]: Start difference. First operand 665 states and 2091 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-09 18:09:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:55,265 INFO L93 Difference]: Finished difference Result 1273 states and 3778 transitions. [2021-07-09 18:09:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:09:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 32 [2021-07-09 18:09:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:55,271 INFO L225 Difference]: With dead ends: 1273 [2021-07-09 18:09:55,271 INFO L226 Difference]: Without dead ends: 1273 [2021-07-09 18:09:55,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:09:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-07-09 18:09:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 665. [2021-07-09 18:09:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 3.1490963855421685) internal successors, (2091), 664 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2091 transitions. [2021-07-09 18:09:55,290 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2091 transitions. Word has length 32 [2021-07-09 18:09:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:55,291 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 2091 transitions. [2021-07-09 18:09:55,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-09 18:09:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2091 transitions. [2021-07-09 18:09:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:09:55,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:55,292 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:55,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:55,511 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1046658411, now seen corresponding path program 6 times [2021-07-09 18:09:55,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:55,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797517940] [2021-07-09 18:09:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:55,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:55,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797517940] [2021-07-09 18:09:55,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797517940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:55,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307621465] [2021-07-09 18:09:55,689 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 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 [2021-07-09 18:09:55,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:09:55,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:09:55,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:55,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307621465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:55,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:55,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-09 18:09:55,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824110994] [2021-07-09 18:09:55,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:09:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:09:55,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:09:55,847 INFO L87 Difference]: Start difference. First operand 665 states and 2091 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:09:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:56,237 INFO L93 Difference]: Finished difference Result 1216 states and 3756 transitions. [2021-07-09 18:09:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:09:56,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 32 [2021-07-09 18:09:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:56,242 INFO L225 Difference]: With dead ends: 1216 [2021-07-09 18:09:56,243 INFO L226 Difference]: Without dead ends: 1216 [2021-07-09 18:09:56,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:09:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-07-09 18:09:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 882. [2021-07-09 18:09:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.2701475595913734) internal successors, (2881), 881 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2881 transitions. [2021-07-09 18:09:56,264 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2881 transitions. Word has length 32 [2021-07-09 18:09:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:56,265 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2881 transitions. [2021-07-09 18:09:56,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:09:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2881 transitions. [2021-07-09 18:09:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:09:56,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:56,267 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:56,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:09:56,487 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1681550799, now seen corresponding path program 7 times [2021-07-09 18:09:56,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:56,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137399307] [2021-07-09 18:09:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:09:56,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:56,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137399307] [2021-07-09 18:09:56,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137399307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:56,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739191276] [2021-07-09 18:09:56,552 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 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 [2021-07-09 18:09:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:09:56,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:09:56,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739191276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:56,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:56,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 18:09:56,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143881792] [2021-07-09 18:09:56,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:09:56,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:09:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:09:56,652 INFO L87 Difference]: Start difference. First operand 882 states and 2881 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-09 18:09:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:56,749 INFO L93 Difference]: Finished difference Result 1358 states and 4416 transitions. [2021-07-09 18:09:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:09:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 32 [2021-07-09 18:09:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:56,754 INFO L225 Difference]: With dead ends: 1358 [2021-07-09 18:09:56,754 INFO L226 Difference]: Without dead ends: 1358 [2021-07-09 18:09:56,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:09:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-07-09 18:09:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 874. [2021-07-09 18:09:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.2829324169530354) internal successors, (2866), 873 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2866 transitions. [2021-07-09 18:09:56,780 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2866 transitions. Word has length 32 [2021-07-09 18:09:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:56,780 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2866 transitions. [2021-07-09 18:09:56,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-09 18:09:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2866 transitions. [2021-07-09 18:09:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:09:56,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:56,782 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:57,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:57,001 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:57,001 INFO L82 PathProgramCache]: Analyzing trace with hash 612200489, now seen corresponding path program 8 times [2021-07-09 18:09:57,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:57,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311271170] [2021-07-09 18:09:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:57,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:57,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311271170] [2021-07-09 18:09:57,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311271170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:57,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509378275] [2021-07-09 18:09:57,063 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 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 [2021-07-09 18:09:57,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:57,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:09:57,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:57,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509378275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:57,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:57,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 18:09:57,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225714247] [2021-07-09 18:09:57,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:09:57,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:57,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:09:57,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:09:57,309 INFO L87 Difference]: Start difference. First operand 874 states and 2866 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-07-09 18:09:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:57,746 INFO L93 Difference]: Finished difference Result 1230 states and 3883 transitions. [2021-07-09 18:09:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:09:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 32 [2021-07-09 18:09:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:57,751 INFO L225 Difference]: With dead ends: 1230 [2021-07-09 18:09:57,751 INFO L226 Difference]: Without dead ends: 1230 [2021-07-09 18:09:57,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:09:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-07-09 18:09:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1030. [2021-07-09 18:09:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.251700680272109) internal successors, (3346), 1029 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3346 transitions. [2021-07-09 18:09:57,773 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3346 transitions. Word has length 32 [2021-07-09 18:09:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:57,773 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3346 transitions. [2021-07-09 18:09:57,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-07-09 18:09:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3346 transitions. [2021-07-09 18:09:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:09:57,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:57,775 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:57,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:57,989 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:57,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1903600235, now seen corresponding path program 9 times [2021-07-09 18:09:57,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:57,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855776649] [2021-07-09 18:09:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:58,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855776649] [2021-07-09 18:09:58,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855776649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093311383] [2021-07-09 18:09:58,082 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 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 [2021-07-09 18:09:58,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:09:58,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:09:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:58,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093311383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:58,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:58,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-07-09 18:09:58,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105850053] [2021-07-09 18:09:58,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:09:58,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:58,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:09:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:09:58,204 INFO L87 Difference]: Start difference. First operand 1030 states and 3346 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:09:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:58,681 INFO L93 Difference]: Finished difference Result 3932 states and 12604 transitions. [2021-07-09 18:09:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:09:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 32 [2021-07-09 18:09:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:58,705 INFO L225 Difference]: With dead ends: 3932 [2021-07-09 18:09:58,706 INFO L226 Difference]: Without dead ends: 3932 [2021-07-09 18:09:58,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-07-09 18:09:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2362. [2021-07-09 18:09:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 3.301143583227446) internal successors, (7794), 2361 states have internal predecessors, (7794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 7794 transitions. [2021-07-09 18:09:58,766 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 7794 transitions. Word has length 32 [2021-07-09 18:09:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:58,766 INFO L482 AbstractCegarLoop]: Abstraction has 2362 states and 7794 transitions. [2021-07-09 18:09:58,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:09:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 7794 transitions. [2021-07-09 18:09:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:09:58,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:58,771 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:58,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:09:58,987 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash 838478855, now seen corresponding path program 10 times [2021-07-09 18:09:58,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:58,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635922554] [2021-07-09 18:09:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:09:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635922554] [2021-07-09 18:09:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635922554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492379273] [2021-07-09 18:09:59,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:09:59,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:59,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:09:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:00,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492379273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:00,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:00,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:10:00,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448404328] [2021-07-09 18:10:00,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:10:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:10:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:10:00,008 INFO L87 Difference]: Start difference. First operand 2362 states and 7794 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:01,295 INFO L93 Difference]: Finished difference Result 4361 states and 13648 transitions. [2021-07-09 18:10:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:10:01,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:01,313 INFO L225 Difference]: With dead ends: 4361 [2021-07-09 18:10:01,313 INFO L226 Difference]: Without dead ends: 4300 [2021-07-09 18:10:01,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1268.1ms TimeCoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:10:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2021-07-09 18:10:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 2886. [2021-07-09 18:10:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2885 states have (on average 3.291854419410745) internal successors, (9497), 2885 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 9497 transitions. [2021-07-09 18:10:01,383 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 9497 transitions. Word has length 34 [2021-07-09 18:10:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:01,383 INFO L482 AbstractCegarLoop]: Abstraction has 2886 states and 9497 transitions. [2021-07-09 18:10:01,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 9497 transitions. [2021-07-09 18:10:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:01,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:01,389 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:01,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:10:01,605 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash 50988291, now seen corresponding path program 11 times [2021-07-09 18:10:01,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:01,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760914900] [2021-07-09 18:10:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:01,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:01,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760914900] [2021-07-09 18:10:01,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760914900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:01,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636956426] [2021-07-09 18:10:01,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:10:01,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:10:01,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:10:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636956426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:02,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:02,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:10:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498942909] [2021-07-09 18:10:02,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:10:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:10:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:10:02,627 INFO L87 Difference]: Start difference. First operand 2886 states and 9497 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:06,184 INFO L93 Difference]: Finished difference Result 6279 states and 19987 transitions. [2021-07-09 18:10:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:10:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:06,206 INFO L225 Difference]: With dead ends: 6279 [2021-07-09 18:10:06,206 INFO L226 Difference]: Without dead ends: 6212 [2021-07-09 18:10:06,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 3125.3ms TimeCoverageRelationStatistics Valid=797, Invalid=6513, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:10:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2021-07-09 18:10:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 3002. [2021-07-09 18:10:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 3.3125624791736086) internal successors, (9941), 3001 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 9941 transitions. [2021-07-09 18:10:06,292 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 9941 transitions. Word has length 34 [2021-07-09 18:10:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:06,292 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 9941 transitions. [2021-07-09 18:10:06,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 9941 transitions. [2021-07-09 18:10:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:06,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:06,298 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:06,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:10:06,509 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1976257533, now seen corresponding path program 12 times [2021-07-09 18:10:06,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:06,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271458302] [2021-07-09 18:10:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:06,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271458302] [2021-07-09 18:10:06,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271458302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061438632] [2021-07-09 18:10:06,739 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 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 [2021-07-09 18:10:06,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:10:06,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:06,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:10:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:07,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061438632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:07,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:07,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:10:07,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413816798] [2021-07-09 18:10:07,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:07,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:07,361 INFO L87 Difference]: Start difference. First operand 3002 states and 9941 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:10,402 INFO L93 Difference]: Finished difference Result 7567 states and 24293 transitions. [2021-07-09 18:10:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:10:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:10,420 INFO L225 Difference]: With dead ends: 7567 [2021-07-09 18:10:10,420 INFO L226 Difference]: Without dead ends: 7487 [2021-07-09 18:10:10,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 2424.9ms TimeCoverageRelationStatistics Valid=971, Invalid=5671, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:10:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-07-09 18:10:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 3065. [2021-07-09 18:10:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 3.3188642297650133) internal successors, (10169), 3064 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 10169 transitions. [2021-07-09 18:10:10,508 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 10169 transitions. Word has length 34 [2021-07-09 18:10:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:10,508 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 10169 transitions. [2021-07-09 18:10:10,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 10169 transitions. [2021-07-09 18:10:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:10,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:10,514 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:10,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 18:10:10,729 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1410994709, now seen corresponding path program 13 times [2021-07-09 18:10:10,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:10,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33428378] [2021-07-09 18:10:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:10,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:10,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33428378] [2021-07-09 18:10:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33428378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152195873] [2021-07-09 18:10:10,994 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 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 [2021-07-09 18:10:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:11,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:11,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:11,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152195873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:11,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:11,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:10:11,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078310272] [2021-07-09 18:10:11,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:10:11,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:11,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:10:11,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:10:11,698 INFO L87 Difference]: Start difference. First operand 3065 states and 10169 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:14,982 INFO L93 Difference]: Finished difference Result 7955 states and 25900 transitions. [2021-07-09 18:10:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:10:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:15,002 INFO L225 Difference]: With dead ends: 7955 [2021-07-09 18:10:15,002 INFO L226 Difference]: Without dead ends: 7901 [2021-07-09 18:10:15,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 2775.9ms TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:10:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-07-09 18:10:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 3129. [2021-07-09 18:10:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 3128 states have (on average 3.317455242966752) internal successors, (10377), 3128 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 10377 transitions. [2021-07-09 18:10:15,104 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 10377 transitions. Word has length 34 [2021-07-09 18:10:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:15,104 INFO L482 AbstractCegarLoop]: Abstraction has 3129 states and 10377 transitions. [2021-07-09 18:10:15,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 10377 transitions. [2021-07-09 18:10:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:15,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:15,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:15,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:15,317 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash -64975377, now seen corresponding path program 14 times [2021-07-09 18:10:15,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:15,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88113876] [2021-07-09 18:10:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:15,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:15,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88113876] [2021-07-09 18:10:15,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88113876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:15,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964403118] [2021-07-09 18:10:15,601 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 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 [2021-07-09 18:10:15,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:15,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:15,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:16,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964403118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:16,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:16,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:10:16,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609780425] [2021-07-09 18:10:16,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:16,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:16,261 INFO L87 Difference]: Start difference. First operand 3129 states and 10377 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:20,548 INFO L93 Difference]: Finished difference Result 9730 states and 31299 transitions. [2021-07-09 18:10:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:10:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:20,569 INFO L225 Difference]: With dead ends: 9730 [2021-07-09 18:10:20,569 INFO L226 Difference]: Without dead ends: 9650 [2021-07-09 18:10:20,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 3604.2ms TimeCoverageRelationStatistics Valid=1725, Invalid=7587, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:10:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-07-09 18:10:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 3598. [2021-07-09 18:10:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 3.33666944676119) internal successors, (12002), 3597 states have internal predecessors, (12002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 12002 transitions. [2021-07-09 18:10:20,694 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 12002 transitions. Word has length 34 [2021-07-09 18:10:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:20,694 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 12002 transitions. [2021-07-09 18:10:20,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 12002 transitions. [2021-07-09 18:10:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:20,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:20,701 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:20,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:10:20,914 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:20,915 INFO L82 PathProgramCache]: Analyzing trace with hash 730172099, now seen corresponding path program 15 times [2021-07-09 18:10:20,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:20,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445910013] [2021-07-09 18:10:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:21,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:21,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445910013] [2021-07-09 18:10:21,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445910013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:21,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266915913] [2021-07-09 18:10:21,145 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 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 [2021-07-09 18:10:21,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:10:21,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:21,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:10:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:21,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266915913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:21,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:21,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:10:21,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294113949] [2021-07-09 18:10:21,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:10:21,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:21,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:10:21,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:10:21,698 INFO L87 Difference]: Start difference. First operand 3598 states and 12002 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:23,933 INFO L93 Difference]: Finished difference Result 6480 states and 21163 transitions. [2021-07-09 18:10:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:10:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:23,946 INFO L225 Difference]: With dead ends: 6480 [2021-07-09 18:10:23,946 INFO L226 Difference]: Without dead ends: 6400 [2021-07-09 18:10:23,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1893.1ms TimeCoverageRelationStatistics Valid=676, Invalid=3230, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:10:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6400 states. [2021-07-09 18:10:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6400 to 3795. [2021-07-09 18:10:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 3.3452820242488137) internal successors, (12692), 3794 states have internal predecessors, (12692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 12692 transitions. [2021-07-09 18:10:24,029 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 12692 transitions. Word has length 34 [2021-07-09 18:10:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:24,030 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 12692 transitions. [2021-07-09 18:10:24,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 12692 transitions. [2021-07-09 18:10:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:24,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:24,037 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:24,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:24,252 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1581764203, now seen corresponding path program 16 times [2021-07-09 18:10:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:24,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106541165] [2021-07-09 18:10:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:24,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:24,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106541165] [2021-07-09 18:10:24,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106541165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:24,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403568173] [2021-07-09 18:10:24,500 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 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 [2021-07-09 18:10:24,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:24,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:10:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:25,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403568173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:25,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:25,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:10:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81464284] [2021-07-09 18:10:25,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:25,068 INFO L87 Difference]: Start difference. First operand 3795 states and 12692 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:26,611 INFO L93 Difference]: Finished difference Result 7367 states and 24066 transitions. [2021-07-09 18:10:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:10:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:26,625 INFO L225 Difference]: With dead ends: 7367 [2021-07-09 18:10:26,626 INFO L226 Difference]: Without dead ends: 7287 [2021-07-09 18:10:26,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1407.5ms TimeCoverageRelationStatistics Valid=604, Invalid=2476, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:10:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-07-09 18:10:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 3801. [2021-07-09 18:10:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 3.344736842105263) internal successors, (12710), 3800 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 12710 transitions. [2021-07-09 18:10:26,708 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 12710 transitions. Word has length 34 [2021-07-09 18:10:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:26,708 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 12710 transitions. [2021-07-09 18:10:26,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 12710 transitions. [2021-07-09 18:10:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:26,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:26,715 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:26,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:26,930 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1949898713, now seen corresponding path program 17 times [2021-07-09 18:10:26,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:26,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290934617] [2021-07-09 18:10:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:27,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290934617] [2021-07-09 18:10:27,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290934617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376672979] [2021-07-09 18:10:27,177 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 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 [2021-07-09 18:10:27,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:10:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:27,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376672979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:27,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:27,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:10:27,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467040465] [2021-07-09 18:10:27,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:10:27,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:27,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:10:27,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:10:27,829 INFO L87 Difference]: Start difference. First operand 3801 states and 12710 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:30,272 INFO L93 Difference]: Finished difference Result 7831 states and 25197 transitions. [2021-07-09 18:10:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:10:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:30,286 INFO L225 Difference]: With dead ends: 7831 [2021-07-09 18:10:30,286 INFO L226 Difference]: Without dead ends: 7757 [2021-07-09 18:10:30,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 2121.5ms TimeCoverageRelationStatistics Valid=959, Invalid=4443, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:10:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2021-07-09 18:10:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 4023. [2021-07-09 18:10:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4023 states, 4022 states have (on average 3.3495773247140725) internal successors, (13472), 4022 states have internal predecessors, (13472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4023 states to 4023 states and 13472 transitions. [2021-07-09 18:10:30,371 INFO L78 Accepts]: Start accepts. Automaton has 4023 states and 13472 transitions. Word has length 34 [2021-07-09 18:10:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:30,371 INFO L482 AbstractCegarLoop]: Abstraction has 4023 states and 13472 transitions. [2021-07-09 18:10:30,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4023 states and 13472 transitions. [2021-07-09 18:10:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:30,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:30,378 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:30,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:30,593 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:30,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1232330713, now seen corresponding path program 18 times [2021-07-09 18:10:30,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:30,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984972655] [2021-07-09 18:10:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:30,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984972655] [2021-07-09 18:10:30,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984972655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70588129] [2021-07-09 18:10:30,854 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 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 [2021-07-09 18:10:30,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:10:30,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:30,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:31,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70588129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:31,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:31,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:10:31,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230102716] [2021-07-09 18:10:31,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:31,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:31,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:31,452 INFO L87 Difference]: Start difference. First operand 4023 states and 13472 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:33,631 INFO L93 Difference]: Finished difference Result 9755 states and 31342 transitions. [2021-07-09 18:10:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:10:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:33,650 INFO L225 Difference]: With dead ends: 9755 [2021-07-09 18:10:33,650 INFO L226 Difference]: Without dead ends: 9657 [2021-07-09 18:10:33,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1819.2ms TimeCoverageRelationStatistics Valid=811, Invalid=3221, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:10:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2021-07-09 18:10:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 4014. [2021-07-09 18:10:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 3.346872663842512) internal successors, (13431), 4013 states have internal predecessors, (13431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 13431 transitions. [2021-07-09 18:10:33,754 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 13431 transitions. Word has length 34 [2021-07-09 18:10:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:33,754 INFO L482 AbstractCegarLoop]: Abstraction has 4014 states and 13431 transitions. [2021-07-09 18:10:33,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 13431 transitions. [2021-07-09 18:10:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:33,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:33,761 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:33,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 18:10:33,977 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1243426667, now seen corresponding path program 19 times [2021-07-09 18:10:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:33,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648469479] [2021-07-09 18:10:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:34,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:34,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648469479] [2021-07-09 18:10:34,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648469479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:34,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314895311] [2021-07-09 18:10:34,229 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 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 [2021-07-09 18:10:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:10:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:34,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314895311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:34,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:34,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:10:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448930375] [2021-07-09 18:10:34,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:34,858 INFO L87 Difference]: Start difference. First operand 4014 states and 13431 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:36,555 INFO L93 Difference]: Finished difference Result 8284 states and 27139 transitions. [2021-07-09 18:10:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:10:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:36,570 INFO L225 Difference]: With dead ends: 8284 [2021-07-09 18:10:36,571 INFO L226 Difference]: Without dead ends: 8204 [2021-07-09 18:10:36,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1577.3ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:10:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8204 states. [2021-07-09 18:10:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8204 to 4042. [2021-07-09 18:10:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 3.344469190794358) internal successors, (13515), 4041 states have internal predecessors, (13515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 13515 transitions. [2021-07-09 18:10:36,655 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 13515 transitions. Word has length 34 [2021-07-09 18:10:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:36,655 INFO L482 AbstractCegarLoop]: Abstraction has 4042 states and 13515 transitions. [2021-07-09 18:10:36,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 13515 transitions. [2021-07-09 18:10:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:36,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:36,662 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:36,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:10:36,876 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -340315217, now seen corresponding path program 20 times [2021-07-09 18:10:36,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:36,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859654642] [2021-07-09 18:10:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:37,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:37,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859654642] [2021-07-09 18:10:37,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859654642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:37,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973750098] [2021-07-09 18:10:37,134 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 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 [2021-07-09 18:10:37,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:37,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:37,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:37,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973750098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:37,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:37,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:10:37,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867840085] [2021-07-09 18:10:37,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:37,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:37,775 INFO L87 Difference]: Start difference. First operand 4042 states and 13515 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:40,623 INFO L93 Difference]: Finished difference Result 6717 states and 21820 transitions. [2021-07-09 18:10:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:10:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:40,635 INFO L225 Difference]: With dead ends: 6717 [2021-07-09 18:10:40,635 INFO L226 Difference]: Without dead ends: 6650 [2021-07-09 18:10:40,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2380.2ms TimeCoverageRelationStatistics Valid=876, Invalid=4674, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:10:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2021-07-09 18:10:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 4254. [2021-07-09 18:10:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 3.347989654361627) internal successors, (14239), 4253 states have internal predecessors, (14239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 14239 transitions. [2021-07-09 18:10:40,726 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 14239 transitions. Word has length 34 [2021-07-09 18:10:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:40,726 INFO L482 AbstractCegarLoop]: Abstraction has 4254 states and 14239 transitions. [2021-07-09 18:10:40,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 14239 transitions. [2021-07-09 18:10:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:40,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:40,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:40,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:10:40,941 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:40,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1800851591, now seen corresponding path program 21 times [2021-07-09 18:10:40,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:40,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771022638] [2021-07-09 18:10:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:41,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771022638] [2021-07-09 18:10:41,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771022638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448580867] [2021-07-09 18:10:41,173 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 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 [2021-07-09 18:10:41,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:10:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:10:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:41,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448580867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:41,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:41,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:10:41,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157085915] [2021-07-09 18:10:41,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:10:41,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:10:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:10:41,714 INFO L87 Difference]: Start difference. First operand 4254 states and 14239 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:43,869 INFO L93 Difference]: Finished difference Result 6962 states and 22749 transitions. [2021-07-09 18:10:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:10:43,869 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:43,881 INFO L225 Difference]: With dead ends: 6962 [2021-07-09 18:10:43,881 INFO L226 Difference]: Without dead ends: 6888 [2021-07-09 18:10:43,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1774.1ms TimeCoverageRelationStatistics Valid=610, Invalid=3172, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:10:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6888 states. [2021-07-09 18:10:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6888 to 4296. [2021-07-09 18:10:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 3.350640279394645) internal successors, (14391), 4295 states have internal predecessors, (14391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 14391 transitions. [2021-07-09 18:10:43,989 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 14391 transitions. Word has length 34 [2021-07-09 18:10:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:43,989 INFO L482 AbstractCegarLoop]: Abstraction has 4296 states and 14391 transitions. [2021-07-09 18:10:43,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 14391 transitions. [2021-07-09 18:10:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:43,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:43,997 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:44,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:44,197 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1642523601, now seen corresponding path program 22 times [2021-07-09 18:10:44,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:44,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762073408] [2021-07-09 18:10:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:44,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:44,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762073408] [2021-07-09 18:10:44,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762073408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:44,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545466633] [2021-07-09 18:10:44,437 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 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 [2021-07-09 18:10:44,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:44,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:10:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:44,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545466633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:44,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:44,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:10:44,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180445886] [2021-07-09 18:10:44,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:44,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:44,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:44,976 INFO L87 Difference]: Start difference. First operand 4296 states and 14391 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:46,453 INFO L93 Difference]: Finished difference Result 7878 states and 25603 transitions. [2021-07-09 18:10:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:10:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:46,468 INFO L225 Difference]: With dead ends: 7878 [2021-07-09 18:10:46,468 INFO L226 Difference]: Without dead ends: 7798 [2021-07-09 18:10:46,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1342.7ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:10:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7798 states. [2021-07-09 18:10:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7798 to 4296. [2021-07-09 18:10:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 3.350640279394645) internal successors, (14391), 4295 states have internal predecessors, (14391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 14391 transitions. [2021-07-09 18:10:46,558 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 14391 transitions. Word has length 34 [2021-07-09 18:10:46,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:46,558 INFO L482 AbstractCegarLoop]: Abstraction has 4296 states and 14391 transitions. [2021-07-09 18:10:46,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 14391 transitions. [2021-07-09 18:10:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:46,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:46,565 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:46,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:46,769 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:46,769 INFO L82 PathProgramCache]: Analyzing trace with hash -879219221, now seen corresponding path program 23 times [2021-07-09 18:10:46,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:46,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555935650] [2021-07-09 18:10:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:47,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:47,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555935650] [2021-07-09 18:10:47,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555935650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:47,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574498253] [2021-07-09 18:10:47,003 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 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 [2021-07-09 18:10:47,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:10:47,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:47,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:47,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:47,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574498253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:47,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:47,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:10:47,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38664668] [2021-07-09 18:10:47,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:10:47,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:10:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:10:47,665 INFO L87 Difference]: Start difference. First operand 4296 states and 14391 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:50,279 INFO L93 Difference]: Finished difference Result 8182 states and 26322 transitions. [2021-07-09 18:10:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:10:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:50,294 INFO L225 Difference]: With dead ends: 8182 [2021-07-09 18:10:50,294 INFO L226 Difference]: Without dead ends: 8114 [2021-07-09 18:10:50,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2175.3ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:10:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8114 states. [2021-07-09 18:10:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8114 to 4724. [2021-07-09 18:10:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 3.344484437857294) internal successors, (15796), 4723 states have internal predecessors, (15796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 15796 transitions. [2021-07-09 18:10:50,421 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 15796 transitions. Word has length 34 [2021-07-09 18:10:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:50,422 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 15796 transitions. [2021-07-09 18:10:50,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 15796 transitions. [2021-07-09 18:10:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:50,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:50,429 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:50,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:50,630 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash -161651221, now seen corresponding path program 24 times [2021-07-09 18:10:50,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:50,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615864839] [2021-07-09 18:10:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:50,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:50,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615864839] [2021-07-09 18:10:50,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615864839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:50,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604701130] [2021-07-09 18:10:50,887 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 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 [2021-07-09 18:10:50,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:10:50,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:50,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:51,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604701130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:51,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:51,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:10:51,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599937577] [2021-07-09 18:10:51,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:51,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:51,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:51,447 INFO L87 Difference]: Start difference. First operand 4724 states and 15796 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:53,067 INFO L93 Difference]: Finished difference Result 10049 states and 32535 transitions. [2021-07-09 18:10:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:10:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:53,085 INFO L225 Difference]: With dead ends: 10049 [2021-07-09 18:10:53,086 INFO L226 Difference]: Without dead ends: 9951 [2021-07-09 18:10:53,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1454.7ms TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:10:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9951 states. [2021-07-09 18:10:53,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9951 to 4716. [2021-07-09 18:10:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4716 states, 4715 states have (on average 3.343796394485684) internal successors, (15766), 4715 states have internal predecessors, (15766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4716 states to 4716 states and 15766 transitions. [2021-07-09 18:10:53,196 INFO L78 Accepts]: Start accepts. Automaton has 4716 states and 15766 transitions. Word has length 34 [2021-07-09 18:10:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:53,196 INFO L482 AbstractCegarLoop]: Abstraction has 4716 states and 15766 transitions. [2021-07-09 18:10:53,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4716 states and 15766 transitions. [2021-07-09 18:10:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:53,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:53,203 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:53,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:53,409 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1980861137, now seen corresponding path program 25 times [2021-07-09 18:10:53,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:53,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151338152] [2021-07-09 18:10:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:53,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:53,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151338152] [2021-07-09 18:10:53,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151338152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:53,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107863458] [2021-07-09 18:10:53,654 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 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 [2021-07-09 18:10:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:10:53,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:54,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107863458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:54,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:54,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:10:54,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511710640] [2021-07-09 18:10:54,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:10:54,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:54,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:10:54,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:10:54,195 INFO L87 Difference]: Start difference. First operand 4716 states and 15766 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:55,809 INFO L93 Difference]: Finished difference Result 8635 states and 28029 transitions. [2021-07-09 18:10:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:10:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:55,825 INFO L225 Difference]: With dead ends: 8635 [2021-07-09 18:10:55,825 INFO L226 Difference]: Without dead ends: 8555 [2021-07-09 18:10:55,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1301.2ms TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:10:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2021-07-09 18:10:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 4724. [2021-07-09 18:10:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 3.3432140588608936) internal successors, (15790), 4723 states have internal predecessors, (15790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 15790 transitions. [2021-07-09 18:10:55,918 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 15790 transitions. Word has length 34 [2021-07-09 18:10:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:55,918 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 15790 transitions. [2021-07-09 18:10:55,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 15790 transitions. [2021-07-09 18:10:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:55,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:55,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:56,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:56,125 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1893297345, now seen corresponding path program 26 times [2021-07-09 18:10:56,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:56,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979261524] [2021-07-09 18:10:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:56,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979261524] [2021-07-09 18:10:56,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979261524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202574496] [2021-07-09 18:10:56,333 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 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 [2021-07-09 18:10:56,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:56,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:56,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:10:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:56,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202574496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:56,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:56,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:10:56,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565792532] [2021-07-09 18:10:56,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:10:56,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:10:56,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:10:56,862 INFO L87 Difference]: Start difference. First operand 4724 states and 15790 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:59,843 INFO L93 Difference]: Finished difference Result 10197 states and 32798 transitions. [2021-07-09 18:10:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:10:59,843 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:10:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:59,861 INFO L225 Difference]: With dead ends: 10197 [2021-07-09 18:10:59,861 INFO L226 Difference]: Without dead ends: 10117 [2021-07-09 18:10:59,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2363.0ms TimeCoverageRelationStatistics Valid=899, Invalid=4801, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:10:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10117 states. [2021-07-09 18:10:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10117 to 5128. [2021-07-09 18:10:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 3.365320850399844) internal successors, (17254), 5127 states have internal predecessors, (17254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 17254 transitions. [2021-07-09 18:10:59,980 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 17254 transitions. Word has length 34 [2021-07-09 18:10:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:59,981 INFO L482 AbstractCegarLoop]: Abstraction has 5128 states and 17254 transitions. [2021-07-09 18:10:59,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 17254 transitions. [2021-07-09 18:10:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:10:59,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:59,987 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:00,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:00,188 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash -19336385, now seen corresponding path program 27 times [2021-07-09 18:11:00,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:00,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090051396] [2021-07-09 18:11:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:00,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:00,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090051396] [2021-07-09 18:11:00,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090051396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:00,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710362686] [2021-07-09 18:11:00,407 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 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 [2021-07-09 18:11:00,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:11:00,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:00,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710362686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:00,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:00,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:11:00,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852897543] [2021-07-09 18:11:00,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:11:00,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:00,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:11:00,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:00,917 INFO L87 Difference]: Start difference. First operand 5128 states and 17254 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:02,639 INFO L93 Difference]: Finished difference Result 10381 states and 34296 transitions. [2021-07-09 18:11:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:11:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:02,659 INFO L225 Difference]: With dead ends: 10381 [2021-07-09 18:11:02,659 INFO L226 Difference]: Without dead ends: 10301 [2021-07-09 18:11:02,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1552.8ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:11:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10301 states. [2021-07-09 18:11:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10301 to 5182. [2021-07-09 18:11:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5181 states have (on average 3.3707778421154218) internal successors, (17464), 5181 states have internal predecessors, (17464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 17464 transitions. [2021-07-09 18:11:02,788 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 17464 transitions. Word has length 34 [2021-07-09 18:11:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:02,788 INFO L482 AbstractCegarLoop]: Abstraction has 5182 states and 17464 transitions. [2021-07-09 18:11:02,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 17464 transitions. [2021-07-09 18:11:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:02,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:02,796 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:02,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 18:11:02,997 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1948594351, now seen corresponding path program 28 times [2021-07-09 18:11:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:02,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658348642] [2021-07-09 18:11:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:03,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:03,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658348642] [2021-07-09 18:11:03,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658348642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:03,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783713591] [2021-07-09 18:11:03,210 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 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 [2021-07-09 18:11:03,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:03,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:11:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:03,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783713591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:03,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:03,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:11:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639337376] [2021-07-09 18:11:03,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:11:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:11:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:11:03,828 INFO L87 Difference]: Start difference. First operand 5182 states and 17464 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:05,517 INFO L93 Difference]: Finished difference Result 8417 states and 27168 transitions. [2021-07-09 18:11:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:11:05,517 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:05,533 INFO L225 Difference]: With dead ends: 8417 [2021-07-09 18:11:05,533 INFO L226 Difference]: Without dead ends: 8356 [2021-07-09 18:11:05,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1679.5ms TimeCoverageRelationStatistics Valid=698, Invalid=3592, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:11:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-07-09 18:11:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 5270. [2021-07-09 18:11:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 5269 states have (on average 3.371417726323781) internal successors, (17764), 5269 states have internal predecessors, (17764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 17764 transitions. [2021-07-09 18:11:05,633 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 17764 transitions. Word has length 34 [2021-07-09 18:11:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:05,633 INFO L482 AbstractCegarLoop]: Abstraction has 5270 states and 17764 transitions. [2021-07-09 18:11:05,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 17764 transitions. [2021-07-09 18:11:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:05,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:05,640 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:05,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-09 18:11:05,844 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:05,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1197449425, now seen corresponding path program 29 times [2021-07-09 18:11:05,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:05,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244377049] [2021-07-09 18:11:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:06,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:06,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244377049] [2021-07-09 18:11:06,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244377049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:06,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9533687] [2021-07-09 18:11:06,076 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:11:06,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:11:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:11:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:06,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9533687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:06,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:06,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:11:06,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002303284] [2021-07-09 18:11:06,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:11:06,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:11:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:11:06,612 INFO L87 Difference]: Start difference. First operand 5270 states and 17764 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:09,620 INFO L93 Difference]: Finished difference Result 9930 states and 32502 transitions. [2021-07-09 18:11:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:11:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:09,639 INFO L225 Difference]: With dead ends: 9930 [2021-07-09 18:11:09,639 INFO L226 Difference]: Without dead ends: 9810 [2021-07-09 18:11:09,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2131 ImplicationChecksByTransitivity, 2534.2ms TimeCoverageRelationStatistics Valid=1258, Invalid=6224, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:11:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-09 18:11:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 5348. [2021-07-09 18:11:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 5347 states have (on average 3.372732373293436) internal successors, (18034), 5347 states have internal predecessors, (18034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 18034 transitions. [2021-07-09 18:11:09,756 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 18034 transitions. Word has length 34 [2021-07-09 18:11:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:09,756 INFO L482 AbstractCegarLoop]: Abstraction has 5348 states and 18034 transitions. [2021-07-09 18:11:09,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 18034 transitions. [2021-07-09 18:11:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:09,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:09,764 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:09,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-09 18:11:09,969 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2119003857, now seen corresponding path program 30 times [2021-07-09 18:11:09,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:09,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095101040] [2021-07-09 18:11:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:10,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:10,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095101040] [2021-07-09 18:11:10,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095101040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:10,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623080722] [2021-07-09 18:11:10,197 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 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 [2021-07-09 18:11:10,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:11:10,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:11:10,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:10,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623080722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:10,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:10,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:11:10,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010426200] [2021-07-09 18:11:10,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:10,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:10,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:10,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:10,767 INFO L87 Difference]: Start difference. First operand 5348 states and 18034 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:12,183 INFO L93 Difference]: Finished difference Result 7662 states and 24942 transitions. [2021-07-09 18:11:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:11:12,184 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:12,198 INFO L225 Difference]: With dead ends: 7662 [2021-07-09 18:11:12,198 INFO L226 Difference]: Without dead ends: 7588 [2021-07-09 18:11:12,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1364.1ms TimeCoverageRelationStatistics Valid=485, Invalid=2707, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:11:12,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-07-09 18:11:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 5476. [2021-07-09 18:11:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5476 states, 5475 states have (on average 3.3782648401826485) internal successors, (18496), 5475 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 18496 transitions. [2021-07-09 18:11:12,293 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 18496 transitions. Word has length 34 [2021-07-09 18:11:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:12,293 INFO L482 AbstractCegarLoop]: Abstraction has 5476 states and 18496 transitions. [2021-07-09 18:11:12,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 18496 transitions. [2021-07-09 18:11:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:12,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:12,301 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:12,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:12,501 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:12,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:12,502 INFO L82 PathProgramCache]: Analyzing trace with hash 943865091, now seen corresponding path program 31 times [2021-07-09 18:11:12,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:12,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256815261] [2021-07-09 18:11:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:12,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:12,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256815261] [2021-07-09 18:11:12,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256815261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:12,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990499305] [2021-07-09 18:11:12,703 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 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 [2021-07-09 18:11:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:13,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990499305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:13,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:13,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:11:13,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095850112] [2021-07-09 18:11:13,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:13,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:13,234 INFO L87 Difference]: Start difference. First operand 5476 states and 18496 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:14,433 INFO L93 Difference]: Finished difference Result 8307 states and 27676 transitions. [2021-07-09 18:11:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:11:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:14,448 INFO L225 Difference]: With dead ends: 8307 [2021-07-09 18:11:14,448 INFO L226 Difference]: Without dead ends: 8227 [2021-07-09 18:11:14,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1056.1ms TimeCoverageRelationStatistics Valid=432, Invalid=2018, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:11:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-07-09 18:11:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 5476. [2021-07-09 18:11:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5476 states, 5475 states have (on average 3.3782648401826485) internal successors, (18496), 5475 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 18496 transitions. [2021-07-09 18:11:14,552 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 18496 transitions. Word has length 34 [2021-07-09 18:11:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:14,552 INFO L482 AbstractCegarLoop]: Abstraction has 5476 states and 18496 transitions. [2021-07-09 18:11:14,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 18496 transitions. [2021-07-09 18:11:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:14,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:14,560 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:14,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:14,760 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash 873755055, now seen corresponding path program 32 times [2021-07-09 18:11:14,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:14,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846386159] [2021-07-09 18:11:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:14,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:14,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846386159] [2021-07-09 18:11:14,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846386159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:14,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700019467] [2021-07-09 18:11:14,956 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 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 [2021-07-09 18:11:14,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:14,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:14,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:14,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:15,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700019467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:15,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:15,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:11:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562879898] [2021-07-09 18:11:15,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:11:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:11:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:15,448 INFO L87 Difference]: Start difference. First operand 5476 states and 18496 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:16,548 INFO L93 Difference]: Finished difference Result 7182 states and 24008 transitions. [2021-07-09 18:11:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:11:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:16,561 INFO L225 Difference]: With dead ends: 7182 [2021-07-09 18:11:16,561 INFO L226 Difference]: Without dead ends: 7102 [2021-07-09 18:11:16,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 974.2ms TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:16,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7102 states. [2021-07-09 18:11:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7102 to 5480. [2021-07-09 18:11:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.3779886840664353) internal successors, (18508), 5479 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18508 transitions. [2021-07-09 18:11:16,652 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18508 transitions. Word has length 34 [2021-07-09 18:11:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:16,652 INFO L482 AbstractCegarLoop]: Abstraction has 5480 states and 18508 transitions. [2021-07-09 18:11:16,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18508 transitions. [2021-07-09 18:11:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:16,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:16,664 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:16,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:16,885 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:16,885 INFO L82 PathProgramCache]: Analyzing trace with hash -665197461, now seen corresponding path program 33 times [2021-07-09 18:11:16,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:16,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959942324] [2021-07-09 18:11:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:17,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:17,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959942324] [2021-07-09 18:11:17,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959942324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:17,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933892896] [2021-07-09 18:11:17,106 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 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 [2021-07-09 18:11:17,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:11:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:11:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:17,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933892896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:17,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:17,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:11:17,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442091840] [2021-07-09 18:11:17,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:17,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:17,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:17,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:17,677 INFO L87 Difference]: Start difference. First operand 5480 states and 18508 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:18,950 INFO L93 Difference]: Finished difference Result 8919 states and 29121 transitions. [2021-07-09 18:11:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:11:18,950 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:18,967 INFO L225 Difference]: With dead ends: 8919 [2021-07-09 18:11:18,967 INFO L226 Difference]: Without dead ends: 8821 [2021-07-09 18:11:18,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1311.4ms TimeCoverageRelationStatistics Valid=565, Invalid=2297, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:11:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2021-07-09 18:11:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 5486. [2021-07-09 18:11:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3757520510483134) internal successors, (18516), 5485 states have internal predecessors, (18516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18516 transitions. [2021-07-09 18:11:19,078 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18516 transitions. Word has length 34 [2021-07-09 18:11:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:19,078 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18516 transitions. [2021-07-09 18:11:19,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18516 transitions. [2021-07-09 18:11:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:19,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:19,112 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:19,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-07-09 18:11:19,329 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1810559919, now seen corresponding path program 34 times [2021-07-09 18:11:19,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:19,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533640726] [2021-07-09 18:11:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:19,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:19,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533640726] [2021-07-09 18:11:19,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533640726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:19,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183837675] [2021-07-09 18:11:19,531 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 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 [2021-07-09 18:11:19,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:19,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:20,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183837675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:20,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:20,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:11:20,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325202082] [2021-07-09 18:11:20,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:20,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:20,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:20,107 INFO L87 Difference]: Start difference. First operand 5486 states and 18516 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:21,039 INFO L93 Difference]: Finished difference Result 6882 states and 22930 transitions. [2021-07-09 18:11:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:11:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:21,052 INFO L225 Difference]: With dead ends: 6882 [2021-07-09 18:11:21,052 INFO L226 Difference]: Without dead ends: 6802 [2021-07-09 18:11:21,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:11:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6802 states. [2021-07-09 18:11:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6802 to 5486. [2021-07-09 18:11:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3757520510483134) internal successors, (18516), 5485 states have internal predecessors, (18516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18516 transitions. [2021-07-09 18:11:21,153 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18516 transitions. Word has length 34 [2021-07-09 18:11:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:21,154 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18516 transitions. [2021-07-09 18:11:21,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18516 transitions. [2021-07-09 18:11:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:21,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:21,161 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:21,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:21,362 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash 306804211, now seen corresponding path program 35 times [2021-07-09 18:11:21,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:21,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543714772] [2021-07-09 18:11:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:21,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:21,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543714772] [2021-07-09 18:11:21,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543714772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:21,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039831888] [2021-07-09 18:11:21,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:11:21,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:11:21,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:11:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:22,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039831888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:22,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:22,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:11:22,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954913803] [2021-07-09 18:11:22,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:11:22,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:11:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:11:22,185 INFO L87 Difference]: Start difference. First operand 5486 states and 18516 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:23,640 INFO L93 Difference]: Finished difference Result 8217 states and 26906 transitions. [2021-07-09 18:11:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:11:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:23,656 INFO L225 Difference]: With dead ends: 8217 [2021-07-09 18:11:23,656 INFO L226 Difference]: Without dead ends: 8156 [2021-07-09 18:11:23,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1258.5ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:11:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-07-09 18:11:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 5558. [2021-07-09 18:11:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5557 states have (on average 3.3773618859096635) internal successors, (18768), 5557 states have internal predecessors, (18768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 18768 transitions. [2021-07-09 18:11:23,753 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 18768 transitions. Word has length 34 [2021-07-09 18:11:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:23,753 INFO L482 AbstractCegarLoop]: Abstraction has 5558 states and 18768 transitions. [2021-07-09 18:11:23,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 18768 transitions. [2021-07-09 18:11:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:23,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:23,762 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:23,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-07-09 18:11:23,978 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1720441613, now seen corresponding path program 36 times [2021-07-09 18:11:23,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:23,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145896247] [2021-07-09 18:11:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:24,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:24,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145896247] [2021-07-09 18:11:24,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145896247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:24,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350111460] [2021-07-09 18:11:24,208 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:11:24,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:11:24,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:11:24,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:24,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350111460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:24,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:24,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-09 18:11:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008981378] [2021-07-09 18:11:24,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:24,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:24,794 INFO L87 Difference]: Start difference. First operand 5558 states and 18768 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:27,235 INFO L93 Difference]: Finished difference Result 10751 states and 35569 transitions. [2021-07-09 18:11:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:11:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:27,255 INFO L225 Difference]: With dead ends: 10751 [2021-07-09 18:11:27,256 INFO L226 Difference]: Without dead ends: 10671 [2021-07-09 18:11:27,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1946.8ms TimeCoverageRelationStatistics Valid=902, Invalid=4354, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:11:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2021-07-09 18:11:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 5448. [2021-07-09 18:11:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 3.3677253534055445) internal successors, (18344), 5447 states have internal predecessors, (18344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 18344 transitions. [2021-07-09 18:11:27,373 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 18344 transitions. Word has length 34 [2021-07-09 18:11:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:27,373 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 18344 transitions. [2021-07-09 18:11:27,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 18344 transitions. [2021-07-09 18:11:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:27,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:27,380 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:27,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:27,581 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash -995404173, now seen corresponding path program 37 times [2021-07-09 18:11:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:27,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268913011] [2021-07-09 18:11:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:27,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268913011] [2021-07-09 18:11:27,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268913011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928184773] [2021-07-09 18:11:27,779 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 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 [2021-07-09 18:11:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:28,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928184773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:28,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:28,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:11:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721704037] [2021-07-09 18:11:28,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:28,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:28,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:28,326 INFO L87 Difference]: Start difference. First operand 5448 states and 18344 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:29,640 INFO L93 Difference]: Finished difference Result 7476 states and 25000 transitions. [2021-07-09 18:11:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:11:29,641 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:29,654 INFO L225 Difference]: With dead ends: 7476 [2021-07-09 18:11:29,654 INFO L226 Difference]: Without dead ends: 7396 [2021-07-09 18:11:29,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1122.2ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:11:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2021-07-09 18:11:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 5456. [2021-07-09 18:11:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 3.367186067827681) internal successors, (18368), 5455 states have internal predecessors, (18368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 18368 transitions. [2021-07-09 18:11:29,747 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 18368 transitions. Word has length 34 [2021-07-09 18:11:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:29,747 INFO L482 AbstractCegarLoop]: Abstraction has 5456 states and 18368 transitions. [2021-07-09 18:11:29,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 18368 transitions. [2021-07-09 18:11:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:29,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:29,755 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:29,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-07-09 18:11:29,955 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1333741709, now seen corresponding path program 38 times [2021-07-09 18:11:29,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:29,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763265061] [2021-07-09 18:11:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:30,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:30,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763265061] [2021-07-09 18:11:30,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763265061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:30,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61072060] [2021-07-09 18:11:30,161 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 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 [2021-07-09 18:11:30,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:30,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:30,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61072060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:30,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:30,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:11:30,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684412900] [2021-07-09 18:11:30,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:11:30,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:11:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:30,690 INFO L87 Difference]: Start difference. First operand 5456 states and 18368 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:31,900 INFO L93 Difference]: Finished difference Result 7452 states and 24922 transitions. [2021-07-09 18:11:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:11:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:31,914 INFO L225 Difference]: With dead ends: 7452 [2021-07-09 18:11:31,914 INFO L226 Difference]: Without dead ends: 7372 [2021-07-09 18:11:31,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1106.4ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:11:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2021-07-09 18:11:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 5458. [2021-07-09 18:11:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5458 states, 5457 states have (on average 3.367051493494594) internal successors, (18374), 5457 states have internal predecessors, (18374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 18374 transitions. [2021-07-09 18:11:32,035 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 18374 transitions. Word has length 34 [2021-07-09 18:11:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:32,035 INFO L482 AbstractCegarLoop]: Abstraction has 5458 states and 18374 transitions. [2021-07-09 18:11:32,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 18374 transitions. [2021-07-09 18:11:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:32,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:32,043 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:32,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-07-09 18:11:32,245 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -58599309, now seen corresponding path program 39 times [2021-07-09 18:11:32,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:32,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086592548] [2021-07-09 18:11:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:32,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:32,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086592548] [2021-07-09 18:11:32,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086592548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:32,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608823144] [2021-07-09 18:11:32,451 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 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 [2021-07-09 18:11:32,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:11:32,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:32,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:32,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608823144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:32,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:32,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:11:32,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056929143] [2021-07-09 18:11:32,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:11:32,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:11:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:32,964 INFO L87 Difference]: Start difference. First operand 5458 states and 18374 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:34,359 INFO L93 Difference]: Finished difference Result 7436 states and 24862 transitions. [2021-07-09 18:11:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:11:34,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:34,373 INFO L225 Difference]: With dead ends: 7436 [2021-07-09 18:11:34,374 INFO L226 Difference]: Without dead ends: 7356 [2021-07-09 18:11:34,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1161.0ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:11:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7356 states. [2021-07-09 18:11:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7356 to 5396. [2021-07-09 18:11:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5396 states, 5395 states have (on average 3.367191844300278) internal successors, (18166), 5395 states have internal predecessors, (18166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5396 states to 5396 states and 18166 transitions. [2021-07-09 18:11:34,465 INFO L78 Accepts]: Start accepts. Automaton has 5396 states and 18166 transitions. Word has length 34 [2021-07-09 18:11:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:34,465 INFO L482 AbstractCegarLoop]: Abstraction has 5396 states and 18166 transitions. [2021-07-09 18:11:34,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5396 states and 18166 transitions. [2021-07-09 18:11:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:34,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:34,472 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:34,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:34,673 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1116590339, now seen corresponding path program 40 times [2021-07-09 18:11:34,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:34,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720171478] [2021-07-09 18:11:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:34,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:34,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720171478] [2021-07-09 18:11:34,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720171478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:34,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158687259] [2021-07-09 18:11:34,875 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 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 [2021-07-09 18:11:34,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:11:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:35,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158687259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:35,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:35,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:11:35,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536564092] [2021-07-09 18:11:35,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:11:35,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:11:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:11:35,482 INFO L87 Difference]: Start difference. First operand 5396 states and 18166 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:37,086 INFO L93 Difference]: Finished difference Result 8783 states and 28680 transitions. [2021-07-09 18:11:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:11:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:37,102 INFO L225 Difference]: With dead ends: 8783 [2021-07-09 18:11:37,102 INFO L226 Difference]: Without dead ends: 8722 [2021-07-09 18:11:37,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1363.4ms TimeCoverageRelationStatistics Valid=516, Invalid=2790, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:11:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-07-09 18:11:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 5510. [2021-07-09 18:11:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5510 states, 5509 states have (on average 3.372299872935197) internal successors, (18578), 5509 states have internal predecessors, (18578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5510 states to 5510 states and 18578 transitions. [2021-07-09 18:11:37,204 INFO L78 Accepts]: Start accepts. Automaton has 5510 states and 18578 transitions. Word has length 34 [2021-07-09 18:11:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:37,204 INFO L482 AbstractCegarLoop]: Abstraction has 5510 states and 18578 transitions. [2021-07-09 18:11:37,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5510 states and 18578 transitions. [2021-07-09 18:11:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:37,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:37,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:37,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:37,412 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:37,412 INFO L82 PathProgramCache]: Analyzing trace with hash -910655485, now seen corresponding path program 41 times [2021-07-09 18:11:37,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:37,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677647395] [2021-07-09 18:11:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:37,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:37,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677647395] [2021-07-09 18:11:37,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677647395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:37,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829971257] [2021-07-09 18:11:37,647 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:11:37,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:11:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:11:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829971257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:38,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:38,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:11:38,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156304954] [2021-07-09 18:11:38,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:11:38,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:11:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:11:38,250 INFO L87 Difference]: Start difference. First operand 5510 states and 18578 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:40,934 INFO L93 Difference]: Finished difference Result 11624 states and 38305 transitions. [2021-07-09 18:11:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:11:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:40,963 INFO L225 Difference]: With dead ends: 11624 [2021-07-09 18:11:40,963 INFO L226 Difference]: Without dead ends: 11544 [2021-07-09 18:11:40,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 2205.5ms TimeCoverageRelationStatistics Valid=1030, Invalid=5290, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:11:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2021-07-09 18:11:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 5428. [2021-07-09 18:11:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3653952459922607) internal successors, (18264), 5427 states have internal predecessors, (18264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18264 transitions. [2021-07-09 18:11:41,091 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18264 transitions. Word has length 34 [2021-07-09 18:11:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:41,092 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18264 transitions. [2021-07-09 18:11:41,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18264 transitions. [2021-07-09 18:11:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:41,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:41,099 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:41,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:41,300 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:41,300 INFO L82 PathProgramCache]: Analyzing trace with hash -185618045, now seen corresponding path program 42 times [2021-07-09 18:11:41,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:41,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170181985] [2021-07-09 18:11:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:41,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:41,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170181985] [2021-07-09 18:11:41,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170181985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:41,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659070019] [2021-07-09 18:11:41,523 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 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 [2021-07-09 18:11:41,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:11:41,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:41,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:41,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:42,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659070019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:42,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:42,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:11:42,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695359328] [2021-07-09 18:11:42,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:11:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:11:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:42,028 INFO L87 Difference]: Start difference. First operand 5428 states and 18264 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:43,549 INFO L93 Difference]: Finished difference Result 8144 states and 27072 transitions. [2021-07-09 18:11:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:11:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:43,564 INFO L225 Difference]: With dead ends: 8144 [2021-07-09 18:11:43,564 INFO L226 Difference]: Without dead ends: 8064 [2021-07-09 18:11:43,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1244.1ms TimeCoverageRelationStatistics Valid=519, Invalid=2343, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:11:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2021-07-09 18:11:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 5428. [2021-07-09 18:11:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3653952459922607) internal successors, (18264), 5427 states have internal predecessors, (18264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18264 transitions. [2021-07-09 18:11:43,660 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18264 transitions. Word has length 34 [2021-07-09 18:11:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:43,660 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18264 transitions. [2021-07-09 18:11:43,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18264 transitions. [2021-07-09 18:11:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:43,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:43,668 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:43,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:43,869 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -523955581, now seen corresponding path program 43 times [2021-07-09 18:11:43,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:43,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640489023] [2021-07-09 18:11:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:44,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:44,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640489023] [2021-07-09 18:11:44,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640489023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:44,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811897671] [2021-07-09 18:11:44,063 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:11:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:44,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811897671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:44,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:44,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:11:44,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28879749] [2021-07-09 18:11:44,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:11:44,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:11:44,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:11:44,622 INFO L87 Difference]: Start difference. First operand 5428 states and 18264 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:46,099 INFO L93 Difference]: Finished difference Result 8029 states and 26707 transitions. [2021-07-09 18:11:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:11:46,100 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:46,115 INFO L225 Difference]: With dead ends: 8029 [2021-07-09 18:11:46,116 INFO L226 Difference]: Without dead ends: 7949 [2021-07-09 18:11:46,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1266.6ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:11:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2021-07-09 18:11:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 5404. [2021-07-09 18:11:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5404 states, 5403 states have (on average 3.3670183231538036) internal successors, (18192), 5403 states have internal predecessors, (18192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 18192 transitions. [2021-07-09 18:11:46,214 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 18192 transitions. Word has length 34 [2021-07-09 18:11:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:46,214 INFO L482 AbstractCegarLoop]: Abstraction has 5404 states and 18192 transitions. [2021-07-09 18:11:46,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 18192 transitions. [2021-07-09 18:11:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:11:46,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:46,222 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:46,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:46,422 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:46,422 INFO L82 PathProgramCache]: Analyzing trace with hash -88435649, now seen corresponding path program 44 times [2021-07-09 18:11:46,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:46,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531893241] [2021-07-09 18:11:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:46,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:46,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531893241] [2021-07-09 18:11:46,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531893241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:46,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286948789] [2021-07-09 18:11:46,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:11:46,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:46,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:11:46,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:47,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286948789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:47,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:47,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-09 18:11:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851897906] [2021-07-09 18:11:47,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:11:47,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:47,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:11:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:11:47,157 INFO L87 Difference]: Start difference. First operand 5404 states and 18192 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:48,984 INFO L93 Difference]: Finished difference Result 9790 states and 32624 transitions. [2021-07-09 18:11:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:11:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:11:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:49,002 INFO L225 Difference]: With dead ends: 9790 [2021-07-09 18:11:49,002 INFO L226 Difference]: Without dead ends: 9710 [2021-07-09 18:11:49,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1477.2ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:11:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9710 states. [2021-07-09 18:11:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9710 to 5416. [2021-07-09 18:11:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5416 states, 5415 states have (on average 3.3717451523545705) internal successors, (18258), 5415 states have internal predecessors, (18258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5416 states to 5416 states and 18258 transitions. [2021-07-09 18:11:49,114 INFO L78 Accepts]: Start accepts. Automaton has 5416 states and 18258 transitions. Word has length 34 [2021-07-09 18:11:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:49,115 INFO L482 AbstractCegarLoop]: Abstraction has 5416 states and 18258 transitions. [2021-07-09 18:11:49,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5416 states and 18258 transitions. [2021-07-09 18:11:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:11:49,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:49,122 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:49,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:49,323 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1454499685, now seen corresponding path program 45 times [2021-07-09 18:11:49,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:49,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806296707] [2021-07-09 18:11:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:11:49,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:49,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806296707] [2021-07-09 18:11:49,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806296707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:49,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185858776] [2021-07-09 18:11:49,603 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 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 [2021-07-09 18:11:49,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:11:49,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:11:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:50,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185858776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:50,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:50,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:11:50,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754112467] [2021-07-09 18:11:50,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:11:50,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:50,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:11:50,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:11:50,363 INFO L87 Difference]: Start difference. First operand 5416 states and 18258 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:52,859 INFO L93 Difference]: Finished difference Result 8760 states and 28557 transitions. [2021-07-09 18:11:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:11:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:11:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:52,874 INFO L225 Difference]: With dead ends: 8760 [2021-07-09 18:11:52,874 INFO L226 Difference]: Without dead ends: 8640 [2021-07-09 18:11:52,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2088.0ms TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:11:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8640 states. [2021-07-09 18:11:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8640 to 5608. [2021-07-09 18:11:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 5607 states have (on average 3.3679329409666487) internal successors, (18884), 5607 states have internal predecessors, (18884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 18884 transitions. [2021-07-09 18:11:52,982 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 18884 transitions. Word has length 36 [2021-07-09 18:11:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:52,982 INFO L482 AbstractCegarLoop]: Abstraction has 5608 states and 18884 transitions. [2021-07-09 18:11:52,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 18884 transitions. [2021-07-09 18:11:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:11:52,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:52,989 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:53,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-07-09 18:11:53,190 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash 616572517, now seen corresponding path program 46 times [2021-07-09 18:11:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:53,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371072438] [2021-07-09 18:11:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:11:53,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:53,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371072438] [2021-07-09 18:11:53,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371072438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:53,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594413255] [2021-07-09 18:11:53,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:11:53,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:11:53,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:54,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594413255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:54,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:54,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:11:54,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281189751] [2021-07-09 18:11:54,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:11:54,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:54,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:11:54,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:11:54,390 INFO L87 Difference]: Start difference. First operand 5608 states and 18884 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:55,931 INFO L93 Difference]: Finished difference Result 7566 states and 24536 transitions. [2021-07-09 18:11:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:11:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:11:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:55,945 INFO L225 Difference]: With dead ends: 7566 [2021-07-09 18:11:55,945 INFO L226 Difference]: Without dead ends: 7478 [2021-07-09 18:11:55,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1765.6ms TimeCoverageRelationStatistics Valid=622, Invalid=3160, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:11:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-07-09 18:11:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5708. [2021-07-09 18:11:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5708 states, 5707 states have (on average 3.375854214123007) internal successors, (19266), 5707 states have internal predecessors, (19266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 19266 transitions. [2021-07-09 18:11:56,057 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 19266 transitions. Word has length 36 [2021-07-09 18:11:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:56,057 INFO L482 AbstractCegarLoop]: Abstraction has 5708 states and 19266 transitions. [2021-07-09 18:11:56,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 19266 transitions. [2021-07-09 18:11:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:11:56,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:56,065 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:56,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:56,265 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:56,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:56,266 INFO L82 PathProgramCache]: Analyzing trace with hash 128038497, now seen corresponding path program 47 times [2021-07-09 18:11:56,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:56,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653602646] [2021-07-09 18:11:56,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:56,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:56,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653602646] [2021-07-09 18:11:56,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653602646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:56,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344819350] [2021-07-09 18:11:56,529 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 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 [2021-07-09 18:11:56,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:11:56,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:56,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:11:56,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:57,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344819350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:57,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:57,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:11:57,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705730017] [2021-07-09 18:11:57,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:11:57,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:57,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:11:57,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:11:57,293 INFO L87 Difference]: Start difference. First operand 5708 states and 19266 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:01,202 INFO L93 Difference]: Finished difference Result 10266 states and 33601 transitions. [2021-07-09 18:12:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-09 18:12:01,203 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:01,221 INFO L225 Difference]: With dead ends: 10266 [2021-07-09 18:12:01,222 INFO L226 Difference]: Without dead ends: 10186 [2021-07-09 18:12:01,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 3475.4ms TimeCoverageRelationStatistics Valid=1591, Invalid=8915, Unknown=0, NotChecked=0, Total=10506 [2021-07-09 18:12:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-07-09 18:12:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 5812. [2021-07-09 18:12:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.382894510411289) internal successors, (19658), 5811 states have internal predecessors, (19658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19658 transitions. [2021-07-09 18:12:01,343 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19658 transitions. Word has length 36 [2021-07-09 18:12:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:01,343 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 19658 transitions. [2021-07-09 18:12:01,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19658 transitions. [2021-07-09 18:12:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:01,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:01,350 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:01,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-07-09 18:12:01,551 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash 845606497, now seen corresponding path program 48 times [2021-07-09 18:12:01,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:01,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959291816] [2021-07-09 18:12:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:01,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:01,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959291816] [2021-07-09 18:12:01,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959291816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:01,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932864442] [2021-07-09 18:12:01,847 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 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 [2021-07-09 18:12:01,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:12:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:12:01,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:02,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932864442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:02,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:02,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-07-09 18:12:02,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081206818] [2021-07-09 18:12:02,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:12:02,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:12:02,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:12:02,614 INFO L87 Difference]: Start difference. First operand 5812 states and 19658 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:07,338 INFO L93 Difference]: Finished difference Result 11702 states and 38034 transitions. [2021-07-09 18:12:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 18:12:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:07,360 INFO L225 Difference]: With dead ends: 11702 [2021-07-09 18:12:07,360 INFO L226 Difference]: Without dead ends: 11573 [2021-07-09 18:12:07,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3958 ImplicationChecksByTransitivity, 4117.9ms TimeCoverageRelationStatistics Valid=1912, Invalid=9430, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:12:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11573 states. [2021-07-09 18:12:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11573 to 5820. [2021-07-09 18:12:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5820 states, 5819 states have (on average 3.3844303144870254) internal successors, (19694), 5819 states have internal predecessors, (19694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5820 states to 5820 states and 19694 transitions. [2021-07-09 18:12:07,508 INFO L78 Accepts]: Start accepts. Automaton has 5820 states and 19694 transitions. Word has length 36 [2021-07-09 18:12:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:07,508 INFO L482 AbstractCegarLoop]: Abstraction has 5820 states and 19694 transitions. [2021-07-09 18:12:07,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5820 states and 19694 transitions. [2021-07-09 18:12:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:07,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:07,516 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:07,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:07,717 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:07,717 INFO L82 PathProgramCache]: Analyzing trace with hash -794973879, now seen corresponding path program 49 times [2021-07-09 18:12:07,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:07,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206657651] [2021-07-09 18:12:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:07,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:07,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206657651] [2021-07-09 18:12:07,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206657651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:07,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334408247] [2021-07-09 18:12:07,984 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 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 [2021-07-09 18:12:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:12:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:08,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334408247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:08,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:08,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:12:08,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784603975] [2021-07-09 18:12:08,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:08,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:08,798 INFO L87 Difference]: Start difference. First operand 5820 states and 19694 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:11,420 INFO L93 Difference]: Finished difference Result 11277 states and 37353 transitions. [2021-07-09 18:12:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:12:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:11,441 INFO L225 Difference]: With dead ends: 11277 [2021-07-09 18:12:11,441 INFO L226 Difference]: Without dead ends: 11196 [2021-07-09 18:12:11,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 2501.6ms TimeCoverageRelationStatistics Valid=924, Invalid=5082, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:12:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11196 states. [2021-07-09 18:12:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11196 to 5838. [2021-07-09 18:12:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.384958026383416) internal successors, (19758), 5837 states have internal predecessors, (19758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 19758 transitions. [2021-07-09 18:12:11,564 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 19758 transitions. Word has length 36 [2021-07-09 18:12:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:11,564 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 19758 transitions. [2021-07-09 18:12:11,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 19758 transitions. [2021-07-09 18:12:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:11,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:11,572 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:11,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-07-09 18:12:11,772 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash 551045453, now seen corresponding path program 50 times [2021-07-09 18:12:11,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:11,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719232993] [2021-07-09 18:12:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:12,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:12,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719232993] [2021-07-09 18:12:12,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719232993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:12,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526696636] [2021-07-09 18:12:12,037 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 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 [2021-07-09 18:12:12,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:12,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:12:12,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:12,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526696636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:12,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:12,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:12:12,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395686225] [2021-07-09 18:12:12,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:12,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:12,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:12,755 INFO L87 Difference]: Start difference. First operand 5838 states and 19758 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:16,371 INFO L93 Difference]: Finished difference Result 13892 states and 45550 transitions. [2021-07-09 18:12:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:12:16,372 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:16,400 INFO L225 Difference]: With dead ends: 13892 [2021-07-09 18:12:16,400 INFO L226 Difference]: Without dead ends: 13778 [2021-07-09 18:12:16,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 3156.1ms TimeCoverageRelationStatistics Valid=1450, Invalid=6922, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:12:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2021-07-09 18:12:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 5952. [2021-07-09 18:12:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5952 states, 5951 states have (on average 3.3886741724079985) internal successors, (20166), 5951 states have internal predecessors, (20166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5952 states to 5952 states and 20166 transitions. [2021-07-09 18:12:16,550 INFO L78 Accepts]: Start accepts. Automaton has 5952 states and 20166 transitions. Word has length 36 [2021-07-09 18:12:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:16,550 INFO L482 AbstractCegarLoop]: Abstraction has 5952 states and 20166 transitions. [2021-07-09 18:12:16,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5952 states and 20166 transitions. [2021-07-09 18:12:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:16,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:16,583 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:16,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-09 18:12:16,783 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:16,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1346192929, now seen corresponding path program 51 times [2021-07-09 18:12:16,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:16,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243864496] [2021-07-09 18:12:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:17,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243864496] [2021-07-09 18:12:17,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243864496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008937895] [2021-07-09 18:12:17,025 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 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 [2021-07-09 18:12:17,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:12:17,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:12:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:17,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008937895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:17,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:17,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:12:17,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165034500] [2021-07-09 18:12:17,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:12:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:12:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:12:17,697 INFO L87 Difference]: Start difference. First operand 5952 states and 20166 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:20,097 INFO L93 Difference]: Finished difference Result 9872 states and 32999 transitions. [2021-07-09 18:12:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:12:20,098 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:20,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:20,117 INFO L225 Difference]: With dead ends: 9872 [2021-07-09 18:12:20,117 INFO L226 Difference]: Without dead ends: 9752 [2021-07-09 18:12:20,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2044.1ms TimeCoverageRelationStatistics Valid=680, Invalid=3742, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:12:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9752 states. [2021-07-09 18:12:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9752 to 5996. [2021-07-09 18:12:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5996 states, 5995 states have (on average 3.3911592994161803) internal successors, (20330), 5995 states have internal predecessors, (20330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5996 states to 5996 states and 20330 transitions. [2021-07-09 18:12:20,270 INFO L78 Accepts]: Start accepts. Automaton has 5996 states and 20330 transitions. Word has length 36 [2021-07-09 18:12:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:20,270 INFO L482 AbstractCegarLoop]: Abstraction has 5996 states and 20330 transitions. [2021-07-09 18:12:20,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5996 states and 20330 transitions. [2021-07-09 18:12:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:20,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:20,278 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:20,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-09 18:12:20,479 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:20,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2097182263, now seen corresponding path program 52 times [2021-07-09 18:12:20,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:20,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637871133] [2021-07-09 18:12:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:20,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:20,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637871133] [2021-07-09 18:12:20,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637871133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:20,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41824166] [2021-07-09 18:12:20,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:12:20,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:20,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:20,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:12:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:21,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41824166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:21,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:21,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:12:21,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832785402] [2021-07-09 18:12:21,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:21,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:21,447 INFO L87 Difference]: Start difference. First operand 5996 states and 20330 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,263 INFO L93 Difference]: Finished difference Result 10367 states and 34699 transitions. [2021-07-09 18:12:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:12:23,263 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:23,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,284 INFO L225 Difference]: With dead ends: 10367 [2021-07-09 18:12:23,284 INFO L226 Difference]: Without dead ends: 10247 [2021-07-09 18:12:23,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1733.9ms TimeCoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:12:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-07-09 18:12:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 6018. [2021-07-09 18:12:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6018 states, 6017 states have (on average 3.3897291008808375) internal successors, (20396), 6017 states have internal predecessors, (20396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 20396 transitions. [2021-07-09 18:12:23,407 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 20396 transitions. Word has length 36 [2021-07-09 18:12:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,407 INFO L482 AbstractCegarLoop]: Abstraction has 6018 states and 20396 transitions. [2021-07-09 18:12:23,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 20396 transitions. [2021-07-09 18:12:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:23,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,416 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-09 18:12:23,629 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1333877883, now seen corresponding path program 53 times [2021-07-09 18:12:23,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378692491] [2021-07-09 18:12:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:23,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378692491] [2021-07-09 18:12:23,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378692491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530853533] [2021-07-09 18:12:23,879 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 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 [2021-07-09 18:12:23,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:12:23,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:12:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:24,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530853533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:24,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:12:24,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882123434] [2021-07-09 18:12:24,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:24,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:24,650 INFO L87 Difference]: Start difference. First operand 6018 states and 20396 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:26,129 INFO L93 Difference]: Finished difference Result 8680 states and 28780 transitions. [2021-07-09 18:12:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:12:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:26,144 INFO L225 Difference]: With dead ends: 8680 [2021-07-09 18:12:26,145 INFO L226 Difference]: Without dead ends: 8612 [2021-07-09 18:12:26,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1493.2ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:12:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8612 states. [2021-07-09 18:12:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8612 to 6106. [2021-07-09 18:12:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6106 states, 6105 states have (on average 3.396232596232596) internal successors, (20734), 6105 states have internal predecessors, (20734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6106 states to 6106 states and 20734 transitions. [2021-07-09 18:12:26,249 INFO L78 Accepts]: Start accepts. Automaton has 6106 states and 20734 transitions. Word has length 36 [2021-07-09 18:12:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:26,249 INFO L482 AbstractCegarLoop]: Abstraction has 6106 states and 20734 transitions. [2021-07-09 18:12:26,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6106 states and 20734 transitions. [2021-07-09 18:12:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:26,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:26,257 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:26,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-09 18:12:26,461 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash -616309883, now seen corresponding path program 54 times [2021-07-09 18:12:26,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:26,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587510886] [2021-07-09 18:12:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:26,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587510886] [2021-07-09 18:12:26,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587510886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180611090] [2021-07-09 18:12:26,723 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 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 [2021-07-09 18:12:26,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:12:26,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:26,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:12:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:27,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180611090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:27,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:27,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:12:27,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426319319] [2021-07-09 18:12:27,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:27,464 INFO L87 Difference]: Start difference. First operand 6106 states and 20734 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:29,546 INFO L93 Difference]: Finished difference Result 10811 states and 35555 transitions. [2021-07-09 18:12:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:12:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:29,566 INFO L225 Difference]: With dead ends: 10811 [2021-07-09 18:12:29,566 INFO L226 Difference]: Without dead ends: 10673 [2021-07-09 18:12:29,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1937.5ms TimeCoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:12:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-07-09 18:12:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6026. [2021-07-09 18:12:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6026 states, 6025 states have (on average 3.388381742738589) internal successors, (20415), 6025 states have internal predecessors, (20415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 20415 transitions. [2021-07-09 18:12:29,693 INFO L78 Accepts]: Start accepts. Automaton has 6026 states and 20415 transitions. Word has length 36 [2021-07-09 18:12:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:29,693 INFO L482 AbstractCegarLoop]: Abstraction has 6026 states and 20415 transitions. [2021-07-09 18:12:29,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6026 states and 20415 transitions. [2021-07-09 18:12:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:29,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:29,701 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:29,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-09 18:12:29,901 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:29,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:29,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1859447497, now seen corresponding path program 55 times [2021-07-09 18:12:29,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:29,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622992960] [2021-07-09 18:12:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:30,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622992960] [2021-07-09 18:12:30,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622992960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131862752] [2021-07-09 18:12:30,130 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 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 [2021-07-09 18:12:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:12:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131862752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:30,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:12:30,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048802140] [2021-07-09 18:12:30,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:30,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:30,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:30,852 INFO L87 Difference]: Start difference. First operand 6026 states and 20415 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:32,514 INFO L93 Difference]: Finished difference Result 8203 states and 27356 transitions. [2021-07-09 18:12:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:12:32,515 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:32,530 INFO L225 Difference]: With dead ends: 8203 [2021-07-09 18:12:32,530 INFO L226 Difference]: Without dead ends: 8083 [2021-07-09 18:12:32,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1535.5ms TimeCoverageRelationStatistics Valid=516, Invalid=2906, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:12:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2021-07-09 18:12:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 6014. [2021-07-09 18:12:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 3.389156826875104) internal successors, (20379), 6013 states have internal predecessors, (20379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 20379 transitions. [2021-07-09 18:12:32,665 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 20379 transitions. Word has length 36 [2021-07-09 18:12:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:32,666 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 20379 transitions. [2021-07-09 18:12:32,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 20379 transitions. [2021-07-09 18:12:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:32,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:32,673 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:32,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-07-09 18:12:32,874 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash 275705613, now seen corresponding path program 56 times [2021-07-09 18:12:32,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:32,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320118550] [2021-07-09 18:12:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:33,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320118550] [2021-07-09 18:12:33,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320118550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181944264] [2021-07-09 18:12:33,154 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 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 [2021-07-09 18:12:33,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:12:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:33,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181944264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:33,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:12:33,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24915763] [2021-07-09 18:12:33,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:33,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:33,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:33,935 INFO L87 Difference]: Start difference. First operand 6014 states and 20379 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:36,483 INFO L93 Difference]: Finished difference Result 10275 states and 33856 transitions. [2021-07-09 18:12:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:12:36,483 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:36,502 INFO L225 Difference]: With dead ends: 10275 [2021-07-09 18:12:36,502 INFO L226 Difference]: Without dead ends: 10168 [2021-07-09 18:12:36,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2318.7ms TimeCoverageRelationStatistics Valid=752, Invalid=4218, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:12:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2021-07-09 18:12:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 6096. [2021-07-09 18:12:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6096 states, 6095 states have (on average 3.3898277276456112) internal successors, (20661), 6095 states have internal predecessors, (20661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 20661 transitions. [2021-07-09 18:12:36,637 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 20661 transitions. Word has length 36 [2021-07-09 18:12:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:36,637 INFO L482 AbstractCegarLoop]: Abstraction has 6096 states and 20661 transitions. [2021-07-09 18:12:36,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 20661 transitions. [2021-07-09 18:12:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:36,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:36,645 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:36,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-09 18:12:36,847 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1878094875, now seen corresponding path program 57 times [2021-07-09 18:12:36,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:36,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104978947] [2021-07-09 18:12:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:37,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:37,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104978947] [2021-07-09 18:12:37,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104978947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:37,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591923316] [2021-07-09 18:12:37,095 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 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 [2021-07-09 18:12:37,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:12:37,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:12:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:37,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591923316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:37,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:37,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:12:37,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825956267] [2021-07-09 18:12:37,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:12:37,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:37,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:12:37,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:12:37,796 INFO L87 Difference]: Start difference. First operand 6096 states and 20661 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:40,167 INFO L93 Difference]: Finished difference Result 10916 states and 36194 transitions. [2021-07-09 18:12:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:12:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:40,212 INFO L225 Difference]: With dead ends: 10916 [2021-07-09 18:12:40,212 INFO L226 Difference]: Without dead ends: 10802 [2021-07-09 18:12:40,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2138.4ms TimeCoverageRelationStatistics Valid=676, Invalid=3880, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:12:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10802 states. [2021-07-09 18:12:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10802 to 6178. [2021-07-09 18:12:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6178 states, 6177 states have (on average 3.3911283794722356) internal successors, (20947), 6177 states have internal predecessors, (20947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 20947 transitions. [2021-07-09 18:12:40,331 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 20947 transitions. Word has length 36 [2021-07-09 18:12:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:40,331 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 20947 transitions. [2021-07-09 18:12:40,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 20947 transitions. [2021-07-09 18:12:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:40,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:40,340 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:40,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-07-09 18:12:40,543 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:40,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1026502771, now seen corresponding path program 58 times [2021-07-09 18:12:40,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:40,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376639265] [2021-07-09 18:12:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:40,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:40,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376639265] [2021-07-09 18:12:40,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376639265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:40,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693226957] [2021-07-09 18:12:40,810 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 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 [2021-07-09 18:12:40,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:40,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:40,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:12:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:41,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693226957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:41,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:41,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:12:41,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581328311] [2021-07-09 18:12:41,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:41,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:41,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:41,511 INFO L87 Difference]: Start difference. First operand 6178 states and 20947 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:43,261 INFO L93 Difference]: Finished difference Result 12093 states and 40336 transitions. [2021-07-09 18:12:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:12:43,261 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:43,285 INFO L225 Difference]: With dead ends: 12093 [2021-07-09 18:12:43,285 INFO L226 Difference]: Without dead ends: 11973 [2021-07-09 18:12:43,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1670.6ms TimeCoverageRelationStatistics Valid=568, Invalid=2738, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:12:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11973 states. [2021-07-09 18:12:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11973 to 6170. [2021-07-09 18:12:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 6169 states have (on average 3.3916355973415464) internal successors, (20923), 6169 states have internal predecessors, (20923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 20923 transitions. [2021-07-09 18:12:43,428 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 20923 transitions. Word has length 36 [2021-07-09 18:12:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:43,428 INFO L482 AbstractCegarLoop]: Abstraction has 6170 states and 20923 transitions. [2021-07-09 18:12:43,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 20923 transitions. [2021-07-09 18:12:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:43,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:43,469 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:43,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:43,669 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash -263198391, now seen corresponding path program 59 times [2021-07-09 18:12:43,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:43,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507032943] [2021-07-09 18:12:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:43,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507032943] [2021-07-09 18:12:43,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507032943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795800663] [2021-07-09 18:12:43,923 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 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 [2021-07-09 18:12:43,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:12:43,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:12:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:44,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795800663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:44,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:12:44,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373099925] [2021-07-09 18:12:44,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:44,695 INFO L87 Difference]: Start difference. First operand 6170 states and 20923 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:46,198 INFO L93 Difference]: Finished difference Result 9747 states and 32350 transitions. [2021-07-09 18:12:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:12:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:46,217 INFO L225 Difference]: With dead ends: 9747 [2021-07-09 18:12:46,217 INFO L226 Difference]: Without dead ends: 9652 [2021-07-09 18:12:46,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1552.6ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:12:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9652 states. [2021-07-09 18:12:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9652 to 5856. [2021-07-09 18:12:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5856 states, 5855 states have (on average 3.378479931682323) internal successors, (19781), 5855 states have internal predecessors, (19781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5856 states to 5856 states and 19781 transitions. [2021-07-09 18:12:46,333 INFO L78 Accepts]: Start accepts. Automaton has 5856 states and 19781 transitions. Word has length 36 [2021-07-09 18:12:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:46,333 INFO L482 AbstractCegarLoop]: Abstraction has 5856 states and 19781 transitions. [2021-07-09 18:12:46,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5856 states and 19781 transitions. [2021-07-09 18:12:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:46,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:46,341 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:46,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 18:12:46,542 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash 454369609, now seen corresponding path program 60 times [2021-07-09 18:12:46,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:46,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510781926] [2021-07-09 18:12:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:46,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:46,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510781926] [2021-07-09 18:12:46,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510781926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:46,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602853898] [2021-07-09 18:12:46,806 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 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 [2021-07-09 18:12:46,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:12:46,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:46,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:12:46,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:47,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602853898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:47,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:47,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:12:47,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889443635] [2021-07-09 18:12:47,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:47,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:47,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:47,534 INFO L87 Difference]: Start difference. First operand 5856 states and 19781 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:49,652 INFO L93 Difference]: Finished difference Result 11290 states and 37077 transitions. [2021-07-09 18:12:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:12:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:49,673 INFO L225 Difference]: With dead ends: 11290 [2021-07-09 18:12:49,673 INFO L226 Difference]: Without dead ends: 11152 [2021-07-09 18:12:49,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2011.2ms TimeCoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:12:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11152 states. [2021-07-09 18:12:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11152 to 5646. [2021-07-09 18:12:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 5645 states have (on average 3.3610274579273693) internal successors, (18973), 5645 states have internal predecessors, (18973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 18973 transitions. [2021-07-09 18:12:49,796 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 18973 transitions. Word has length 36 [2021-07-09 18:12:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:49,796 INFO L482 AbstractCegarLoop]: Abstraction has 5646 states and 18973 transitions. [2021-07-09 18:12:49,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 18973 transitions. [2021-07-09 18:12:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:49,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:49,804 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:50,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-09 18:12:50,005 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1364840307, now seen corresponding path program 61 times [2021-07-09 18:12:50,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:50,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839782495] [2021-07-09 18:12:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:50,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:50,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839782495] [2021-07-09 18:12:50,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839782495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:50,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172967523] [2021-07-09 18:12:50,238 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 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 [2021-07-09 18:12:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:50,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:12:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:51,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172967523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:51,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:51,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:12:51,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479318074] [2021-07-09 18:12:51,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:12:51,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:51,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:12:51,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:12:51,023 INFO L87 Difference]: Start difference. First operand 5646 states and 18973 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:52,785 INFO L93 Difference]: Finished difference Result 8759 states and 29052 transitions. [2021-07-09 18:12:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:12:52,786 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:52,801 INFO L225 Difference]: With dead ends: 8759 [2021-07-09 18:12:52,801 INFO L226 Difference]: Without dead ends: 8639 [2021-07-09 18:12:52,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1709.2ms TimeCoverageRelationStatistics Valid=534, Invalid=3248, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:12:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8639 states. [2021-07-09 18:12:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8639 to 5542. [2021-07-09 18:12:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5542 states, 5541 states have (on average 3.3598628406424833) internal successors, (18617), 5541 states have internal predecessors, (18617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5542 states to 5542 states and 18617 transitions. [2021-07-09 18:12:52,900 INFO L78 Accepts]: Start accepts. Automaton has 5542 states and 18617 transitions. Word has length 36 [2021-07-09 18:12:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:52,900 INFO L482 AbstractCegarLoop]: Abstraction has 5542 states and 18617 transitions. [2021-07-09 18:12:52,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5542 states and 18617 transitions. [2021-07-09 18:12:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:52,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:52,908 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:53,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-09 18:12:53,108 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash 596684445, now seen corresponding path program 62 times [2021-07-09 18:12:53,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:53,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988879739] [2021-07-09 18:12:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:53,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988879739] [2021-07-09 18:12:53,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988879739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87032245] [2021-07-09 18:12:53,362 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 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 [2021-07-09 18:12:53,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:53,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:53,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:12:53,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:54,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87032245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:54,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:54,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:12:54,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443601315] [2021-07-09 18:12:54,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:12:54,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:54,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:12:54,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:12:54,018 INFO L87 Difference]: Start difference. First operand 5542 states and 18617 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:56,379 INFO L93 Difference]: Finished difference Result 11413 states and 38103 transitions. [2021-07-09 18:12:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:12:56,379 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:56,400 INFO L225 Difference]: With dead ends: 11413 [2021-07-09 18:12:56,400 INFO L226 Difference]: Without dead ends: 11293 [2021-07-09 18:12:56,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 2079.6ms TimeCoverageRelationStatistics Valid=689, Invalid=3343, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:12:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11293 states. [2021-07-09 18:12:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11293 to 5710. [2021-07-09 18:12:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 3.3639866876861095) internal successors, (19205), 5709 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 19205 transitions. [2021-07-09 18:12:56,523 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 19205 transitions. Word has length 36 [2021-07-09 18:12:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:56,523 INFO L482 AbstractCegarLoop]: Abstraction has 5710 states and 19205 transitions. [2021-07-09 18:12:56,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 19205 transitions. [2021-07-09 18:12:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:56,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:56,531 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:56,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:56,737 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1758359141, now seen corresponding path program 63 times [2021-07-09 18:12:56,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:56,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135037502] [2021-07-09 18:12:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:57,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:57,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135037502] [2021-07-09 18:12:57,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135037502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:57,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084157853] [2021-07-09 18:12:57,062 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 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 [2021-07-09 18:12:57,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:12:57,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:57,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:12:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:57,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084157853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:57,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:57,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:12:57,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545545180] [2021-07-09 18:12:57,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:12:57,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:12:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:12:57,707 INFO L87 Difference]: Start difference. First operand 5710 states and 19205 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:59,728 INFO L93 Difference]: Finished difference Result 6931 states and 22716 transitions. [2021-07-09 18:12:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:12:59,728 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:12:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:59,741 INFO L225 Difference]: With dead ends: 6931 [2021-07-09 18:12:59,741 INFO L226 Difference]: Without dead ends: 6824 [2021-07-09 18:12:59,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1785.5ms TimeCoverageRelationStatistics Valid=460, Invalid=2962, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:12:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-07-09 18:12:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 5770. [2021-07-09 18:12:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5770 states, 5769 states have (on average 3.3615877968452073) internal successors, (19393), 5769 states have internal predecessors, (19393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 19393 transitions. [2021-07-09 18:12:59,850 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 19393 transitions. Word has length 36 [2021-07-09 18:12:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:59,850 INFO L482 AbstractCegarLoop]: Abstraction has 5770 states and 19393 transitions. [2021-07-09 18:12:59,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 19393 transitions. [2021-07-09 18:12:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:12:59,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:59,858 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:00,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-09 18:13:00,059 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1168692123, now seen corresponding path program 64 times [2021-07-09 18:13:00,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:00,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080868382] [2021-07-09 18:13:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:13:00,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:00,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080868382] [2021-07-09 18:13:00,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080868382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:00,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289613879] [2021-07-09 18:13:00,293 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 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 [2021-07-09 18:13:00,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:00,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:00,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:13:00,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:00,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289613879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:00,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:00,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:13:00,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355026605] [2021-07-09 18:13:00,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:00,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:00,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:00,926 INFO L87 Difference]: Start difference. First operand 5770 states and 19393 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:02,236 INFO L93 Difference]: Finished difference Result 6434 states and 21120 transitions. [2021-07-09 18:13:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:13:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:02,247 INFO L225 Difference]: With dead ends: 6434 [2021-07-09 18:13:02,247 INFO L226 Difference]: Without dead ends: 6238 [2021-07-09 18:13:02,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1409.5ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:13:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-07-09 18:13:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5850. [2021-07-09 18:13:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 5849 states have (on average 3.34980338519405) internal successors, (19593), 5849 states have internal predecessors, (19593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 19593 transitions. [2021-07-09 18:13:02,334 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 19593 transitions. Word has length 36 [2021-07-09 18:13:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:02,334 INFO L482 AbstractCegarLoop]: Abstraction has 5850 states and 19593 transitions. [2021-07-09 18:13:02,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 19593 transitions. [2021-07-09 18:13:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:02,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:02,342 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:02,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:02,542 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1710959515, now seen corresponding path program 65 times [2021-07-09 18:13:02,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:02,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961702098] [2021-07-09 18:13:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:02,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:02,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961702098] [2021-07-09 18:13:02,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961702098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:02,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948449717] [2021-07-09 18:13:02,801 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 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 [2021-07-09 18:13:02,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:13:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:13:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:03,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948449717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:03,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:03,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:13:03,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408740248] [2021-07-09 18:13:03,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:13:03,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:13:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:13:03,475 INFO L87 Difference]: Start difference. First operand 5850 states and 19593 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:05,443 INFO L93 Difference]: Finished difference Result 9004 states and 28798 transitions. [2021-07-09 18:13:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:13:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:05,458 INFO L225 Difference]: With dead ends: 9004 [2021-07-09 18:13:05,458 INFO L226 Difference]: Without dead ends: 8808 [2021-07-09 18:13:05,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1916.6ms TimeCoverageRelationStatistics Valid=733, Invalid=4379, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:13:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8808 states. [2021-07-09 18:13:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8808 to 5858. [2021-07-09 18:13:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5858 states, 5857 states have (on average 3.3517158955096464) internal successors, (19631), 5857 states have internal predecessors, (19631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 19631 transitions. [2021-07-09 18:13:05,560 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 19631 transitions. Word has length 36 [2021-07-09 18:13:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:05,560 INFO L482 AbstractCegarLoop]: Abstraction has 5858 states and 19631 transitions. [2021-07-09 18:13:05,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 19631 transitions. [2021-07-09 18:13:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:05,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:05,569 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:05,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-09 18:13:05,769 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:05,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1479251937, now seen corresponding path program 66 times [2021-07-09 18:13:05,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:05,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887495387] [2021-07-09 18:13:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:06,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:06,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887495387] [2021-07-09 18:13:06,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887495387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:06,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83822346] [2021-07-09 18:13:06,007 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 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 [2021-07-09 18:13:06,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:13:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:13:06,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:06,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83822346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:06,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:06,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:13:06,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438530893] [2021-07-09 18:13:06,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:13:06,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:06,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:13:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:13:06,575 INFO L87 Difference]: Start difference. First operand 5858 states and 19631 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:11,896 INFO L93 Difference]: Finished difference Result 9736 states and 31024 transitions. [2021-07-09 18:13:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:13:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:11,911 INFO L225 Difference]: With dead ends: 9736 [2021-07-09 18:13:11,912 INFO L226 Difference]: Without dead ends: 9471 [2021-07-09 18:13:11,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 3699.1ms TimeCoverageRelationStatistics Valid=1169, Invalid=10173, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:13:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9471 states. [2021-07-09 18:13:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9471 to 5808. [2021-07-09 18:13:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5808 states, 5807 states have (on average 3.3643878078181504) internal successors, (19537), 5807 states have internal predecessors, (19537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5808 states to 5808 states and 19537 transitions. [2021-07-09 18:13:12,016 INFO L78 Accepts]: Start accepts. Automaton has 5808 states and 19537 transitions. Word has length 36 [2021-07-09 18:13:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:12,016 INFO L482 AbstractCegarLoop]: Abstraction has 5808 states and 19537 transitions. [2021-07-09 18:13:12,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5808 states and 19537 transitions. [2021-07-09 18:13:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:12,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:12,024 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:12,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable593 [2021-07-09 18:13:12,225 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1492941925, now seen corresponding path program 67 times [2021-07-09 18:13:12,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:12,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228040089] [2021-07-09 18:13:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:12,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228040089] [2021-07-09 18:13:12,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228040089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74270584] [2021-07-09 18:13:12,481 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 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 [2021-07-09 18:13:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:13:12,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:13,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74270584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:13,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:13,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:13:13,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740388974] [2021-07-09 18:13:13,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:13:13,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:13:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:13:13,142 INFO L87 Difference]: Start difference. First operand 5808 states and 19537 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:16,083 INFO L93 Difference]: Finished difference Result 10782 states and 34224 transitions. [2021-07-09 18:13:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:13:16,083 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:16,101 INFO L225 Difference]: With dead ends: 10782 [2021-07-09 18:13:16,101 INFO L226 Difference]: Without dead ends: 10528 [2021-07-09 18:13:16,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 2644.1ms TimeCoverageRelationStatistics Valid=1007, Invalid=6649, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:13:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-07-09 18:13:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 5832. [2021-07-09 18:13:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.364602984050763) internal successors, (19619), 5831 states have internal predecessors, (19619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19619 transitions. [2021-07-09 18:13:16,216 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19619 transitions. Word has length 36 [2021-07-09 18:13:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:16,216 INFO L482 AbstractCegarLoop]: Abstraction has 5832 states and 19619 transitions. [2021-07-09 18:13:16,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19619 transitions. [2021-07-09 18:13:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:16,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:16,223 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:16,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-09 18:13:16,424 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1796517217, now seen corresponding path program 68 times [2021-07-09 18:13:16,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:16,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512270153] [2021-07-09 18:13:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:16,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512270153] [2021-07-09 18:13:16,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512270153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700253369] [2021-07-09 18:13:16,697 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 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 [2021-07-09 18:13:16,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:13:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:17,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700253369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:17,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:17,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:13:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728248753] [2021-07-09 18:13:17,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:17,336 INFO L87 Difference]: Start difference. First operand 5832 states and 19619 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:23,574 INFO L93 Difference]: Finished difference Result 11579 states and 36649 transitions. [2021-07-09 18:13:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 18:13:23,574 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:23,593 INFO L225 Difference]: With dead ends: 11579 [2021-07-09 18:13:23,593 INFO L226 Difference]: Without dead ends: 11330 [2021-07-09 18:13:23,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4927 ImplicationChecksByTransitivity, 4568.9ms TimeCoverageRelationStatistics Valid=1570, Invalid=12950, Unknown=0, NotChecked=0, Total=14520 [2021-07-09 18:13:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11330 states. [2021-07-09 18:13:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11330 to 5885. [2021-07-09 18:13:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5885 states, 5884 states have (on average 3.3664174031271243) internal successors, (19808), 5884 states have internal predecessors, (19808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5885 states to 5885 states and 19808 transitions. [2021-07-09 18:13:23,710 INFO L78 Accepts]: Start accepts. Automaton has 5885 states and 19808 transitions. Word has length 36 [2021-07-09 18:13:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:23,710 INFO L482 AbstractCegarLoop]: Abstraction has 5885 states and 19808 transitions. [2021-07-09 18:13:23,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5885 states and 19808 transitions. [2021-07-09 18:13:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:23,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:23,718 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:23,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:23,919 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2064227935, now seen corresponding path program 69 times [2021-07-09 18:13:23,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:23,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730876915] [2021-07-09 18:13:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:24,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730876915] [2021-07-09 18:13:24,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730876915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427397750] [2021-07-09 18:13:24,293 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 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 [2021-07-09 18:13:24,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:13:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:13:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:24,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427397750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:24,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:24,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:13:24,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548396612] [2021-07-09 18:13:24,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:13:24,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:24,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:13:24,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:13:24,955 INFO L87 Difference]: Start difference. First operand 5885 states and 19808 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:27,068 INFO L93 Difference]: Finished difference Result 7906 states and 25610 transitions. [2021-07-09 18:13:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:13:27,069 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:27,082 INFO L225 Difference]: With dead ends: 7906 [2021-07-09 18:13:27,082 INFO L226 Difference]: Without dead ends: 7799 [2021-07-09 18:13:27,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1931.5ms TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:13:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2021-07-09 18:13:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 6005. [2021-07-09 18:13:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6004 states have (on average 3.358427714856762) internal successors, (20164), 6004 states have internal predecessors, (20164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 20164 transitions. [2021-07-09 18:13:27,186 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 20164 transitions. Word has length 36 [2021-07-09 18:13:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:27,186 INFO L482 AbstractCegarLoop]: Abstraction has 6005 states and 20164 transitions. [2021-07-09 18:13:27,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 20164 transitions. [2021-07-09 18:13:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:27,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:27,194 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:27,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable605 [2021-07-09 18:13:27,395 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:27,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:27,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1392812193, now seen corresponding path program 70 times [2021-07-09 18:13:27,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:27,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670630815] [2021-07-09 18:13:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:27,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:27,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670630815] [2021-07-09 18:13:27,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670630815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:27,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738850554] [2021-07-09 18:13:27,693 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 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 [2021-07-09 18:13:27,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:27,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:27,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:13:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:28,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738850554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:28,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:28,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:13:28,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129940355] [2021-07-09 18:13:28,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:13:28,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:13:28,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:13:28,336 INFO L87 Difference]: Start difference. First operand 6005 states and 20164 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:30,610 INFO L93 Difference]: Finished difference Result 7193 states and 23300 transitions. [2021-07-09 18:13:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:13:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:30,622 INFO L225 Difference]: With dead ends: 7193 [2021-07-09 18:13:30,622 INFO L226 Difference]: Without dead ends: 7058 [2021-07-09 18:13:30,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 2247.5ms TimeCoverageRelationStatistics Valid=742, Invalid=4808, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:13:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7058 states. [2021-07-09 18:13:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7058 to 6063. [2021-07-09 18:13:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 6062 states have (on average 3.3525239194985152) internal successors, (20323), 6062 states have internal predecessors, (20323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 20323 transitions. [2021-07-09 18:13:30,716 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 20323 transitions. Word has length 36 [2021-07-09 18:13:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:30,717 INFO L482 AbstractCegarLoop]: Abstraction has 6063 states and 20323 transitions. [2021-07-09 18:13:30,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 20323 transitions. [2021-07-09 18:13:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:30,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:30,725 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:30,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:30,925 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -696311903, now seen corresponding path program 71 times [2021-07-09 18:13:30,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:30,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688940248] [2021-07-09 18:13:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:31,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:31,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688940248] [2021-07-09 18:13:31,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688940248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:31,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144466990] [2021-07-09 18:13:31,230 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 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 [2021-07-09 18:13:31,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:13:31,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:13:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:31,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144466990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:31,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:31,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:13:31,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883549476] [2021-07-09 18:13:31,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:13:31,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:31,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:13:31,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:13:31,834 INFO L87 Difference]: Start difference. First operand 6063 states and 20323 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:34,702 INFO L93 Difference]: Finished difference Result 7335 states and 23715 transitions. [2021-07-09 18:13:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:13:34,703 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:34,716 INFO L225 Difference]: With dead ends: 7335 [2021-07-09 18:13:34,716 INFO L226 Difference]: Without dead ends: 7260 [2021-07-09 18:13:34,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 2647.1ms TimeCoverageRelationStatistics Valid=887, Invalid=5593, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:13:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7260 states. [2021-07-09 18:13:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7260 to 6171. [2021-07-09 18:13:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6171 states, 6170 states have (on average 3.344246353322528) internal successors, (20634), 6170 states have internal predecessors, (20634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 20634 transitions. [2021-07-09 18:13:34,813 INFO L78 Accepts]: Start accepts. Automaton has 6171 states and 20634 transitions. Word has length 36 [2021-07-09 18:13:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:34,813 INFO L482 AbstractCegarLoop]: Abstraction has 6171 states and 20634 transitions. [2021-07-09 18:13:34,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 6171 states and 20634 transitions. [2021-07-09 18:13:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:34,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:34,821 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:35,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-07-09 18:13:35,022 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1070891677, now seen corresponding path program 72 times [2021-07-09 18:13:35,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:35,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442226251] [2021-07-09 18:13:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:35,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:35,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442226251] [2021-07-09 18:13:35,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442226251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:35,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448442450] [2021-07-09 18:13:35,312 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 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 [2021-07-09 18:13:35,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:13:35,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:13:35,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:35,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448442450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:35,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:35,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:13:35,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831203013] [2021-07-09 18:13:35,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:35,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:35,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:35,947 INFO L87 Difference]: Start difference. First operand 6171 states and 20634 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:39,840 INFO L93 Difference]: Finished difference Result 8255 states and 26426 transitions. [2021-07-09 18:13:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:13:39,841 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:39,854 INFO L225 Difference]: With dead ends: 8255 [2021-07-09 18:13:39,854 INFO L226 Difference]: Without dead ends: 8074 [2021-07-09 18:13:39,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 3177.3ms TimeCoverageRelationStatistics Valid=1010, Invalid=7546, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:13:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-07-09 18:13:39,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 6189. [2021-07-09 18:13:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 3.348901098901099) internal successors, (20723), 6188 states have internal predecessors, (20723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 20723 transitions. [2021-07-09 18:13:39,961 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 20723 transitions. Word has length 36 [2021-07-09 18:13:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:39,961 INFO L482 AbstractCegarLoop]: Abstraction has 6189 states and 20723 transitions. [2021-07-09 18:13:39,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 20723 transitions. [2021-07-09 18:13:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:39,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:39,969 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:40,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:40,170 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1787377759, now seen corresponding path program 73 times [2021-07-09 18:13:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:40,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496127051] [2021-07-09 18:13:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:40,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496127051] [2021-07-09 18:13:40,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496127051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220546243] [2021-07-09 18:13:40,525 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 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 [2021-07-09 18:13:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:40,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:13:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:41,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220546243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:41,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:41,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:13:41,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427608164] [2021-07-09 18:13:41,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:13:41,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:13:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:13:41,208 INFO L87 Difference]: Start difference. First operand 6189 states and 20723 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,454 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-07-09 18:13:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:46,036 INFO L93 Difference]: Finished difference Result 9960 states and 31523 transitions. [2021-07-09 18:13:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:13:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:46,053 INFO L225 Difference]: With dead ends: 9960 [2021-07-09 18:13:46,053 INFO L226 Difference]: Without dead ends: 9784 [2021-07-09 18:13:46,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4433.4ms TimeCoverageRelationStatistics Valid=1469, Invalid=10303, Unknown=0, NotChecked=0, Total=11772 [2021-07-09 18:13:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9784 states. [2021-07-09 18:13:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9784 to 6221. [2021-07-09 18:13:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 3.352572347266881) internal successors, (20853), 6220 states have internal predecessors, (20853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 20853 transitions. [2021-07-09 18:13:46,169 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 20853 transitions. Word has length 36 [2021-07-09 18:13:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:46,169 INFO L482 AbstractCegarLoop]: Abstraction has 6221 states and 20853 transitions. [2021-07-09 18:13:46,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 20853 transitions. [2021-07-09 18:13:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:46,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:46,178 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:46,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-07-09 18:13:46,379 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:46,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1483802467, now seen corresponding path program 74 times [2021-07-09 18:13:46,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:46,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267947515] [2021-07-09 18:13:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:46,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:46,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267947515] [2021-07-09 18:13:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267947515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:46,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403634256] [2021-07-09 18:13:46,700 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 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 [2021-07-09 18:13:46,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:13:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:47,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403634256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:47,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:47,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-07-09 18:13:47,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252438919] [2021-07-09 18:13:47,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:13:47,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:47,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:13:47,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:13:47,353 INFO L87 Difference]: Start difference. First operand 6221 states and 20853 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:53,900 INFO L93 Difference]: Finished difference Result 11583 states and 36494 transitions. [2021-07-09 18:13:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-09 18:13:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:53,919 INFO L225 Difference]: With dead ends: 11583 [2021-07-09 18:13:53,919 INFO L226 Difference]: Without dead ends: 11362 [2021-07-09 18:13:53,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5373 ImplicationChecksByTransitivity, 5392.5ms TimeCoverageRelationStatistics Valid=1885, Invalid=13865, Unknown=0, NotChecked=0, Total=15750 [2021-07-09 18:13:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2021-07-09 18:13:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 6259. [2021-07-09 18:13:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6259 states, 6258 states have (on average 3.3557046979865772) internal successors, (21000), 6258 states have internal predecessors, (21000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 21000 transitions. [2021-07-09 18:13:54,060 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 21000 transitions. Word has length 36 [2021-07-09 18:13:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:54,060 INFO L482 AbstractCegarLoop]: Abstraction has 6259 states and 21000 transitions. [2021-07-09 18:13:54,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 21000 transitions. [2021-07-09 18:13:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:54,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:54,070 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:54,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:54,270 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:54,270 INFO L82 PathProgramCache]: Analyzing trace with hash 382814025, now seen corresponding path program 75 times [2021-07-09 18:13:54,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:54,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647426231] [2021-07-09 18:13:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:54,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:54,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647426231] [2021-07-09 18:13:54,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647426231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:54,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506692070] [2021-07-09 18:13:54,624 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 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 [2021-07-09 18:13:54,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:13:54,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:54,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:13:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506692070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:55,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:55,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:13:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347272955] [2021-07-09 18:13:55,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:13:55,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:13:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:13:55,322 INFO L87 Difference]: Start difference. First operand 6259 states and 21000 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:57,554 INFO L93 Difference]: Finished difference Result 8672 states and 27998 transitions. [2021-07-09 18:13:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:13:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:13:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:57,570 INFO L225 Difference]: With dead ends: 8672 [2021-07-09 18:13:57,571 INFO L226 Difference]: Without dead ends: 8565 [2021-07-09 18:13:57,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2163.4ms TimeCoverageRelationStatistics Valid=563, Invalid=3597, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:13:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-07-09 18:13:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 6313. [2021-07-09 18:13:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6313 states, 6312 states have (on average 3.3542458808618503) internal successors, (21172), 6312 states have internal predecessors, (21172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 21172 transitions. [2021-07-09 18:13:57,682 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 21172 transitions. Word has length 36 [2021-07-09 18:13:57,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:57,682 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 21172 transitions. [2021-07-09 18:13:57,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:57,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 21172 transitions. [2021-07-09 18:13:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:13:57,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:57,692 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:57,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-07-09 18:13:57,892 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:57,892 INFO L82 PathProgramCache]: Analyzing trace with hash -455113143, now seen corresponding path program 76 times [2021-07-09 18:13:57,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:57,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887133815] [2021-07-09 18:13:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:58,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:58,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887133815] [2021-07-09 18:13:58,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887133815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:58,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354571152] [2021-07-09 18:13:58,179 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 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 [2021-07-09 18:13:58,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:58,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:13:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:58,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354571152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:58,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:58,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:13:58,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59752445] [2021-07-09 18:13:58,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:13:58,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:58,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:13:58,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:13:58,817 INFO L87 Difference]: Start difference. First operand 6313 states and 21172 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:01,808 INFO L93 Difference]: Finished difference Result 8419 states and 26898 transitions. [2021-07-09 18:14:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:14:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:01,824 INFO L225 Difference]: With dead ends: 8419 [2021-07-09 18:14:01,824 INFO L226 Difference]: Without dead ends: 8284 [2021-07-09 18:14:01,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2582.0ms TimeCoverageRelationStatistics Valid=918, Invalid=5888, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:14:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-07-09 18:14:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 6303. [2021-07-09 18:14:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 6302 states have (on average 3.3576642335766422) internal successors, (21160), 6302 states have internal predecessors, (21160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 21160 transitions. [2021-07-09 18:14:01,937 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 21160 transitions. Word has length 36 [2021-07-09 18:14:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:01,937 INFO L482 AbstractCegarLoop]: Abstraction has 6303 states and 21160 transitions. [2021-07-09 18:14:01,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 21160 transitions. [2021-07-09 18:14:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:01,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:01,946 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:02,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:02,147 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash 284308813, now seen corresponding path program 77 times [2021-07-09 18:14:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:02,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139324020] [2021-07-09 18:14:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:02,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:02,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139324020] [2021-07-09 18:14:02,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139324020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:02,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023705743] [2021-07-09 18:14:02,471 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 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 [2021-07-09 18:14:02,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:14:02,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:14:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:03,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023705743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:03,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:03,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:14:03,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229088761] [2021-07-09 18:14:03,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:14:03,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:03,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:14:03,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:14:03,101 INFO L87 Difference]: Start difference. First operand 6303 states and 21160 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:08,641 INFO L93 Difference]: Finished difference Result 10875 states and 34405 transitions. [2021-07-09 18:14:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-09 18:14:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:08,660 INFO L225 Difference]: With dead ends: 10875 [2021-07-09 18:14:08,661 INFO L226 Difference]: Without dead ends: 10726 [2021-07-09 18:14:08,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 5144.9ms TimeCoverageRelationStatistics Valid=1864, Invalid=12178, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:14:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10726 states. [2021-07-09 18:14:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10726 to 6331. [2021-07-09 18:14:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6331 states, 6330 states have (on average 3.36129541864139) internal successors, (21277), 6330 states have internal predecessors, (21277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 21277 transitions. [2021-07-09 18:14:08,790 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 21277 transitions. Word has length 36 [2021-07-09 18:14:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:08,790 INFO L482 AbstractCegarLoop]: Abstraction has 6331 states and 21277 transitions. [2021-07-09 18:14:08,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 21277 transitions. [2021-07-09 18:14:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:08,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:08,799 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:08,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-07-09 18:14:09,000 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1276802377, now seen corresponding path program 78 times [2021-07-09 18:14:09,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:09,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995019991] [2021-07-09 18:14:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:09,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:09,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995019991] [2021-07-09 18:14:09,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995019991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:09,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073128141] [2021-07-09 18:14:09,292 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 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 [2021-07-09 18:14:09,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:14:09,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:14:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:09,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073128141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:09,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:09,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:14:09,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654762382] [2021-07-09 18:14:09,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:09,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:09,863 INFO L87 Difference]: Start difference. First operand 6331 states and 21277 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:16,152 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-09 18:14:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:16,638 INFO L93 Difference]: Finished difference Result 12657 states and 39981 transitions. [2021-07-09 18:14:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-07-09 18:14:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:16,664 INFO L225 Difference]: With dead ends: 12657 [2021-07-09 18:14:16,664 INFO L226 Difference]: Without dead ends: 12476 [2021-07-09 18:14:16,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6155 ImplicationChecksByTransitivity, 5786.5ms TimeCoverageRelationStatistics Valid=2252, Invalid=14778, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 18:14:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12476 states. [2021-07-09 18:14:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12476 to 6337. [2021-07-09 18:14:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 6336 states have (on average 3.3630050505050506) internal successors, (21308), 6336 states have internal predecessors, (21308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 21308 transitions. [2021-07-09 18:14:16,819 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 21308 transitions. Word has length 36 [2021-07-09 18:14:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:16,819 INFO L482 AbstractCegarLoop]: Abstraction has 6337 states and 21308 transitions. [2021-07-09 18:14:16,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 21308 transitions. [2021-07-09 18:14:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:16,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:16,829 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:17,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-09 18:14:17,039 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash -156963695, now seen corresponding path program 79 times [2021-07-09 18:14:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:17,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703264853] [2021-07-09 18:14:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:17,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703264853] [2021-07-09 18:14:17,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703264853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956242814] [2021-07-09 18:14:17,399 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 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 [2021-07-09 18:14:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:17,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:14:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:18,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956242814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:18,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:18,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:14:18,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027306720] [2021-07-09 18:14:18,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:14:18,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:18,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:14:18,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:14:18,107 INFO L87 Difference]: Start difference. First operand 6337 states and 21308 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:21,132 INFO L93 Difference]: Finished difference Result 11404 states and 37120 transitions. [2021-07-09 18:14:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:14:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:21,154 INFO L225 Difference]: With dead ends: 11404 [2021-07-09 18:14:21,154 INFO L226 Difference]: Without dead ends: 11309 [2021-07-09 18:14:21,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 2984.9ms TimeCoverageRelationStatistics Valid=1114, Invalid=5692, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:14:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11309 states. [2021-07-09 18:14:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11309 to 6425. [2021-07-09 18:14:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6425 states, 6424 states have (on average 3.366282689912827) internal successors, (21625), 6424 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 21625 transitions. [2021-07-09 18:14:21,294 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 21625 transitions. Word has length 36 [2021-07-09 18:14:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:21,294 INFO L482 AbstractCegarLoop]: Abstraction has 6425 states and 21625 transitions. [2021-07-09 18:14:21,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 21625 transitions. [2021-07-09 18:14:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:21,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:21,304 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:21,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:21,505 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 764738445, now seen corresponding path program 80 times [2021-07-09 18:14:21,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:21,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743358300] [2021-07-09 18:14:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:21,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:21,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743358300] [2021-07-09 18:14:21,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743358300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:21,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905187629] [2021-07-09 18:14:21,917 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 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 [2021-07-09 18:14:21,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:21,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:21,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:14:21,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905187629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:22,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:22,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:14:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894974490] [2021-07-09 18:14:22,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:14:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:14:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:14:22,550 INFO L87 Difference]: Start difference. First operand 6425 states and 21625 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:25,542 INFO L93 Difference]: Finished difference Result 12482 states and 40625 transitions. [2021-07-09 18:14:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:14:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:25,566 INFO L225 Difference]: With dead ends: 12482 [2021-07-09 18:14:25,567 INFO L226 Difference]: Without dead ends: 12362 [2021-07-09 18:14:25,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2778.9ms TimeCoverageRelationStatistics Valid=1043, Invalid=4809, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:14:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12362 states. [2021-07-09 18:14:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12362 to 6308. [2021-07-09 18:14:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6308 states, 6307 states have (on average 3.3624544157285556) internal successors, (21207), 6307 states have internal predecessors, (21207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6308 states to 6308 states and 21207 transitions. [2021-07-09 18:14:25,710 INFO L78 Accepts]: Start accepts. Automaton has 6308 states and 21207 transitions. Word has length 36 [2021-07-09 18:14:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:25,710 INFO L482 AbstractCegarLoop]: Abstraction has 6308 states and 21207 transitions. [2021-07-09 18:14:25,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6308 states and 21207 transitions. [2021-07-09 18:14:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:25,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:25,719 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:25,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:25,920 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1489775885, now seen corresponding path program 81 times [2021-07-09 18:14:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:25,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69389149] [2021-07-09 18:14:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:26,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:26,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69389149] [2021-07-09 18:14:26,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69389149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:26,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490711107] [2021-07-09 18:14:26,260 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 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 [2021-07-09 18:14:26,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:14:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:26,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:14:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:26,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490711107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:26,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:26,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:14:26,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013633772] [2021-07-09 18:14:26,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:14:26,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:14:26,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:14:26,848 INFO L87 Difference]: Start difference. First operand 6308 states and 21207 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:28,206 INFO L93 Difference]: Finished difference Result 8640 states and 28461 transitions. [2021-07-09 18:14:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:14:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:28,222 INFO L225 Difference]: With dead ends: 8640 [2021-07-09 18:14:28,222 INFO L226 Difference]: Without dead ends: 8520 [2021-07-09 18:14:28,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1502.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2089, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:14:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8520 states. [2021-07-09 18:14:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8520 to 6322. [2021-07-09 18:14:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6322 states, 6321 states have (on average 3.3616516373991456) internal successors, (21249), 6321 states have internal predecessors, (21249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6322 states to 6322 states and 21249 transitions. [2021-07-09 18:14:28,332 INFO L78 Accepts]: Start accepts. Automaton has 6322 states and 21249 transitions. Word has length 36 [2021-07-09 18:14:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:28,332 INFO L482 AbstractCegarLoop]: Abstraction has 6322 states and 21249 transitions. [2021-07-09 18:14:28,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6322 states and 21249 transitions. [2021-07-09 18:14:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:28,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:28,341 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:28,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:28,542 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash -83145439, now seen corresponding path program 82 times [2021-07-09 18:14:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:28,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701985848] [2021-07-09 18:14:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:28,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:28,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701985848] [2021-07-09 18:14:28,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701985848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:28,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700728291] [2021-07-09 18:14:28,811 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 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 [2021-07-09 18:14:28,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:28,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:14:28,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:29,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700728291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:29,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:29,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:14:29,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157552701] [2021-07-09 18:14:29,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:29,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:29,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:29,423 INFO L87 Difference]: Start difference. First operand 6322 states and 21249 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:31,742 INFO L93 Difference]: Finished difference Result 8018 states and 25933 transitions. [2021-07-09 18:14:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:14:31,743 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:31,758 INFO L225 Difference]: With dead ends: 8018 [2021-07-09 18:14:31,758 INFO L226 Difference]: Without dead ends: 7857 [2021-07-09 18:14:31,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2081.6ms TimeCoverageRelationStatistics Valid=634, Invalid=4058, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:14:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2021-07-09 18:14:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6384. [2021-07-09 18:14:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 6383 states have (on average 3.363152122826257) internal successors, (21467), 6383 states have internal predecessors, (21467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 21467 transitions. [2021-07-09 18:14:31,879 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 21467 transitions. Word has length 36 [2021-07-09 18:14:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:31,879 INFO L482 AbstractCegarLoop]: Abstraction has 6384 states and 21467 transitions. [2021-07-09 18:14:31,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 21467 transitions. [2021-07-09 18:14:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:31,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:31,889 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:32,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:32,105 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash 909348125, now seen corresponding path program 83 times [2021-07-09 18:14:32,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:32,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241952778] [2021-07-09 18:14:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:32,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:32,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241952778] [2021-07-09 18:14:32,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241952778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:32,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492282117] [2021-07-09 18:14:32,369 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 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 [2021-07-09 18:14:32,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:14:32,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:32,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:14:32,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:32,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492282117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:32,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:32,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:14:32,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063775805] [2021-07-09 18:14:32,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:32,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:32,960 INFO L87 Difference]: Start difference. First operand 6384 states and 21467 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:35,698 INFO L93 Difference]: Finished difference Result 8861 states and 28472 transitions. [2021-07-09 18:14:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:14:35,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:35,715 INFO L225 Difference]: With dead ends: 8861 [2021-07-09 18:14:35,715 INFO L226 Difference]: Without dead ends: 8700 [2021-07-09 18:14:35,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2484.6ms TimeCoverageRelationStatistics Valid=910, Invalid=5410, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:14:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8700 states. [2021-07-09 18:14:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8700 to 6395. [2021-07-09 18:14:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6395 states, 6394 states have (on average 3.364716922114482) internal successors, (21514), 6394 states have internal predecessors, (21514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 21514 transitions. [2021-07-09 18:14:35,847 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 21514 transitions. Word has length 36 [2021-07-09 18:14:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:35,847 INFO L482 AbstractCegarLoop]: Abstraction has 6395 states and 21514 transitions. [2021-07-09 18:14:35,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 21514 transitions. [2021-07-09 18:14:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:35,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:35,857 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:36,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-07-09 18:14:36,057 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1626916125, now seen corresponding path program 84 times [2021-07-09 18:14:36,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:36,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962282162] [2021-07-09 18:14:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:36,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:36,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962282162] [2021-07-09 18:14:36,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962282162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:36,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257002545] [2021-07-09 18:14:36,365 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 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 [2021-07-09 18:14:36,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:14:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:36,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:14:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:36,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257002545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:36,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:36,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:14:36,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611827646] [2021-07-09 18:14:36,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:14:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:14:36,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:14:36,912 INFO L87 Difference]: Start difference. First operand 6395 states and 21514 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:40,273 INFO L93 Difference]: Finished difference Result 10583 states and 33813 transitions. [2021-07-09 18:14:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:14:40,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:40,292 INFO L225 Difference]: With dead ends: 10583 [2021-07-09 18:14:40,292 INFO L226 Difference]: Without dead ends: 10372 [2021-07-09 18:14:40,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 2834.9ms TimeCoverageRelationStatistics Valid=1202, Invalid=6108, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:14:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-07-09 18:14:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 6391. [2021-07-09 18:14:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 3.3641627543035995) internal successors, (21497), 6390 states have internal predecessors, (21497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 21497 transitions. [2021-07-09 18:14:40,437 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 21497 transitions. Word has length 36 [2021-07-09 18:14:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:40,438 INFO L482 AbstractCegarLoop]: Abstraction has 6391 states and 21497 transitions. [2021-07-09 18:14:40,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 21497 transitions. [2021-07-09 18:14:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:40,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:40,448 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:40,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:40,648 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2041887031, now seen corresponding path program 85 times [2021-07-09 18:14:40,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:40,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416935609] [2021-07-09 18:14:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:40,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416935609] [2021-07-09 18:14:40,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416935609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593981051] [2021-07-09 18:14:40,916 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 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 [2021-07-09 18:14:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:40,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:14:40,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:41,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593981051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:41,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:41,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:14:41,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405195908] [2021-07-09 18:14:41,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:41,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:41,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:41,531 INFO L87 Difference]: Start difference. First operand 6391 states and 21497 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:43,890 INFO L93 Difference]: Finished difference Result 8165 states and 26463 transitions. [2021-07-09 18:14:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:14:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:43,904 INFO L225 Difference]: With dead ends: 8165 [2021-07-09 18:14:43,904 INFO L226 Difference]: Without dead ends: 8004 [2021-07-09 18:14:43,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1950.9ms TimeCoverageRelationStatistics Valid=724, Invalid=4246, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:14:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2021-07-09 18:14:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 6406. [2021-07-09 18:14:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6406 states, 6405 states have (on average 3.3645589383294303) internal successors, (21550), 6405 states have internal predecessors, (21550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 21550 transitions. [2021-07-09 18:14:44,012 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 21550 transitions. Word has length 36 [2021-07-09 18:14:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:44,012 INFO L482 AbstractCegarLoop]: Abstraction has 6406 states and 21550 transitions. [2021-07-09 18:14:44,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 21550 transitions. [2021-07-09 18:14:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:44,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:44,022 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:44,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable691 [2021-07-09 18:14:44,222 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:44,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1324319031, now seen corresponding path program 86 times [2021-07-09 18:14:44,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:44,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876794326] [2021-07-09 18:14:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:44,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:44,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876794326] [2021-07-09 18:14:44,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876794326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:44,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218290087] [2021-07-09 18:14:44,486 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 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 [2021-07-09 18:14:44,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:44,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:14:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:45,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218290087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:45,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:45,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:14:45,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087560037] [2021-07-09 18:14:45,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:14:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:14:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:14:45,025 INFO L87 Difference]: Start difference. First operand 6406 states and 21550 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:47,806 INFO L93 Difference]: Finished difference Result 10553 states and 33696 transitions. [2021-07-09 18:14:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:14:47,806 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:47,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:47,826 INFO L225 Difference]: With dead ends: 10553 [2021-07-09 18:14:47,826 INFO L226 Difference]: Without dead ends: 10342 [2021-07-09 18:14:47,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 2382.6ms TimeCoverageRelationStatistics Valid=1002, Invalid=5004, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:14:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2021-07-09 18:14:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 6407. [2021-07-09 18:14:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 6406 states have (on average 3.3641898220418356) internal successors, (21551), 6406 states have internal predecessors, (21551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 21551 transitions. [2021-07-09 18:14:47,968 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 21551 transitions. Word has length 36 [2021-07-09 18:14:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:47,968 INFO L482 AbstractCegarLoop]: Abstraction has 6407 states and 21551 transitions. [2021-07-09 18:14:47,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 21551 transitions. [2021-07-09 18:14:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:47,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:47,978 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:48,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-07-09 18:14:48,178 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1151438349, now seen corresponding path program 87 times [2021-07-09 18:14:48,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:48,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661889710] [2021-07-09 18:14:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:48,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:48,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661889710] [2021-07-09 18:14:48,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661889710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:48,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022968948] [2021-07-09 18:14:48,556 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 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 [2021-07-09 18:14:48,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:14:48,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:14:48,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022968948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:49,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:49,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:14:49,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730434652] [2021-07-09 18:14:49,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:14:49,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:14:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:14:49,095 INFO L87 Difference]: Start difference. First operand 6407 states and 21551 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:50,582 INFO L93 Difference]: Finished difference Result 8201 states and 27000 transitions. [2021-07-09 18:14:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:14:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:50,598 INFO L225 Difference]: With dead ends: 8201 [2021-07-09 18:14:50,598 INFO L226 Difference]: Without dead ends: 8072 [2021-07-09 18:14:50,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1506.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:14:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8072 states. [2021-07-09 18:14:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8072 to 6405. [2021-07-09 18:14:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6405 states, 6404 states have (on average 3.363366645846346) internal successors, (21539), 6404 states have internal predecessors, (21539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 21539 transitions. [2021-07-09 18:14:50,708 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 21539 transitions. Word has length 36 [2021-07-09 18:14:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:50,709 INFO L482 AbstractCegarLoop]: Abstraction has 6405 states and 21539 transitions. [2021-07-09 18:14:50,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 21539 transitions. [2021-07-09 18:14:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:50,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:50,718 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:50,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-07-09 18:14:50,918 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1790791203, now seen corresponding path program 88 times [2021-07-09 18:14:50,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:50,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703250354] [2021-07-09 18:14:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:51,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703250354] [2021-07-09 18:14:51,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703250354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647154898] [2021-07-09 18:14:51,251 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 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 [2021-07-09 18:14:51,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:14:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:51,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647154898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:51,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:51,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:14:51,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871434177] [2021-07-09 18:14:51,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:14:51,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:14:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:14:51,904 INFO L87 Difference]: Start difference. First operand 6405 states and 21539 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:54,654 INFO L93 Difference]: Finished difference Result 8063 states and 26002 transitions. [2021-07-09 18:14:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:14:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:54,669 INFO L225 Difference]: With dead ends: 8063 [2021-07-09 18:14:54,670 INFO L226 Difference]: Without dead ends: 7881 [2021-07-09 18:14:54,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2570.8ms TimeCoverageRelationStatistics Valid=730, Invalid=4970, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:14:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2021-07-09 18:14:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 6463. [2021-07-09 18:14:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6463 states, 6462 states have (on average 3.361188486536676) internal successors, (21720), 6462 states have internal predecessors, (21720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 21720 transitions. [2021-07-09 18:14:54,818 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 21720 transitions. Word has length 36 [2021-07-09 18:14:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:54,818 INFO L482 AbstractCegarLoop]: Abstraction has 6463 states and 21720 transitions. [2021-07-09 18:14:54,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 21720 transitions. [2021-07-09 18:14:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:54,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:54,827 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:55,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-07-09 18:14:55,027 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1487215911, now seen corresponding path program 89 times [2021-07-09 18:14:55,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:55,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750283106] [2021-07-09 18:14:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:55,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:55,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750283106] [2021-07-09 18:14:55,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750283106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:55,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327883057] [2021-07-09 18:14:55,333 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 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 [2021-07-09 18:14:55,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:14:55,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:14:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:55,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327883057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:55,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:55,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:14:55,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939083728] [2021-07-09 18:14:55,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:14:55,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:14:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:14:55,956 INFO L87 Difference]: Start difference. First operand 6463 states and 21720 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:59,223 INFO L93 Difference]: Finished difference Result 8853 states and 28355 transitions. [2021-07-09 18:14:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:14:59,224 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:14:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:59,238 INFO L225 Difference]: With dead ends: 8853 [2021-07-09 18:14:59,238 INFO L226 Difference]: Without dead ends: 8671 [2021-07-09 18:14:59,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 2781.1ms TimeCoverageRelationStatistics Valid=933, Invalid=5873, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:14:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8671 states. [2021-07-09 18:14:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8671 to 6488. [2021-07-09 18:14:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6488 states, 6487 states have (on average 3.3611839062740865) internal successors, (21804), 6487 states have internal predecessors, (21804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6488 states to 6488 states and 21804 transitions. [2021-07-09 18:14:59,355 INFO L78 Accepts]: Start accepts. Automaton has 6488 states and 21804 transitions. Word has length 36 [2021-07-09 18:14:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:59,355 INFO L482 AbstractCegarLoop]: Abstraction has 6488 states and 21804 transitions. [2021-07-09 18:14:59,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6488 states and 21804 transitions. [2021-07-09 18:14:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:14:59,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:59,365 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:59,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:59,565 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash 900864729, now seen corresponding path program 90 times [2021-07-09 18:14:59,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:59,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285279459] [2021-07-09 18:14:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:59,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:59,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285279459] [2021-07-09 18:14:59,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285279459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:59,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438594425] [2021-07-09 18:14:59,841 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 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 [2021-07-09 18:14:59,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:14:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:14:59,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:00,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438594425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:00,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:00,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:15:00,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909254788] [2021-07-09 18:15:00,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:00,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:00,503 INFO L87 Difference]: Start difference. First operand 6488 states and 21804 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:05,711 INFO L93 Difference]: Finished difference Result 10749 states and 34203 transitions. [2021-07-09 18:15:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:15:05,711 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:05,731 INFO L225 Difference]: With dead ends: 10749 [2021-07-09 18:15:05,731 INFO L226 Difference]: Without dead ends: 10510 [2021-07-09 18:15:05,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3874 ImplicationChecksByTransitivity, 4331.9ms TimeCoverageRelationStatistics Valid=1683, Invalid=9659, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:15:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10510 states. [2021-07-09 18:15:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10510 to 6505. [2021-07-09 18:15:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 3.367158671586716) internal successors, (21900), 6504 states have internal predecessors, (21900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 21900 transitions. [2021-07-09 18:15:05,872 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 21900 transitions. Word has length 36 [2021-07-09 18:15:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:05,872 INFO L482 AbstractCegarLoop]: Abstraction has 6505 states and 21900 transitions. [2021-07-09 18:15:05,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 21900 transitions. [2021-07-09 18:15:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:05,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:05,882 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:06,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:06,083 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1349181829, now seen corresponding path program 91 times [2021-07-09 18:15:06,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:06,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992859892] [2021-07-09 18:15:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:06,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:06,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992859892] [2021-07-09 18:15:06,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992859892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:06,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352468341] [2021-07-09 18:15:06,387 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 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 [2021-07-09 18:15:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:15:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352468341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:07,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:07,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:15:07,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532414884] [2021-07-09 18:15:07,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:15:07,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:07,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:15:07,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:15:07,175 INFO L87 Difference]: Start difference. First operand 6505 states and 21900 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:09,630 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-07-09 18:15:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:10,407 INFO L93 Difference]: Finished difference Result 8617 states and 27681 transitions. [2021-07-09 18:15:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:15:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:10,424 INFO L225 Difference]: With dead ends: 8617 [2021-07-09 18:15:10,424 INFO L226 Difference]: Without dead ends: 8435 [2021-07-09 18:15:10,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 2957.9ms TimeCoverageRelationStatistics Valid=942, Invalid=5538, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:15:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8435 states. [2021-07-09 18:15:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8435 to 6568. [2021-07-09 18:15:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 3.367595553525202) internal successors, (22115), 6567 states have internal predecessors, (22115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 22115 transitions. [2021-07-09 18:15:10,579 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 22115 transitions. Word has length 36 [2021-07-09 18:15:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:10,580 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 22115 transitions. [2021-07-09 18:15:10,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 22115 transitions. [2021-07-09 18:15:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:10,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:10,590 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:10,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:10,791 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash -557704827, now seen corresponding path program 92 times [2021-07-09 18:15:10,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:10,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288893000] [2021-07-09 18:15:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:11,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288893000] [2021-07-09 18:15:11,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288893000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704133697] [2021-07-09 18:15:11,099 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 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 [2021-07-09 18:15:11,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:11,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:15:11,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:11,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704133697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:11,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:11,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:15:11,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492519063] [2021-07-09 18:15:11,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:11,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:11,707 INFO L87 Difference]: Start difference. First operand 6568 states and 22115 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:16,968 INFO L93 Difference]: Finished difference Result 11094 states and 35253 transitions. [2021-07-09 18:15:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:15:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:16,988 INFO L225 Difference]: With dead ends: 11094 [2021-07-09 18:15:16,988 INFO L226 Difference]: Without dead ends: 10855 [2021-07-09 18:15:16,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3910 ImplicationChecksByTransitivity, 4419.6ms TimeCoverageRelationStatistics Valid=1777, Invalid=9779, Unknown=0, NotChecked=0, Total=11556 [2021-07-09 18:15:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-07-09 18:15:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 6591. [2021-07-09 18:15:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6591 states, 6590 states have (on average 3.368740515933232) internal successors, (22200), 6590 states have internal predecessors, (22200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 22200 transitions. [2021-07-09 18:15:17,130 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 22200 transitions. Word has length 36 [2021-07-09 18:15:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:17,130 INFO L482 AbstractCegarLoop]: Abstraction has 6591 states and 22200 transitions. [2021-07-09 18:15:17,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 22200 transitions. [2021-07-09 18:15:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:17,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:17,140 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:17,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-07-09 18:15:17,341 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash -766744631, now seen corresponding path program 93 times [2021-07-09 18:15:17,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:17,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429357918] [2021-07-09 18:15:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:17,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:17,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429357918] [2021-07-09 18:15:17,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429357918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:17,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860647986] [2021-07-09 18:15:17,620 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 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 [2021-07-09 18:15:17,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:15:17,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:17,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:15:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:18,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860647986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:18,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:18,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:15:18,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124156423] [2021-07-09 18:15:18,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:15:18,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:18,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:15:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:15:18,199 INFO L87 Difference]: Start difference. First operand 6591 states and 22200 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:20,902 INFO L93 Difference]: Finished difference Result 8571 states and 27763 transitions. [2021-07-09 18:15:20,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:15:20,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:20,919 INFO L225 Difference]: With dead ends: 8571 [2021-07-09 18:15:20,919 INFO L226 Difference]: Without dead ends: 8375 [2021-07-09 18:15:20,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2374.5ms TimeCoverageRelationStatistics Valid=759, Invalid=4941, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:15:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8375 states. [2021-07-09 18:15:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8375 to 6588. [2021-07-09 18:15:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6588 states, 6587 states have (on average 3.3693638985881282) internal successors, (22194), 6587 states have internal predecessors, (22194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 22194 transitions. [2021-07-09 18:15:21,038 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 22194 transitions. Word has length 36 [2021-07-09 18:15:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:21,038 INFO L482 AbstractCegarLoop]: Abstraction has 6588 states and 22194 transitions. [2021-07-09 18:15:21,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 22194 transitions. [2021-07-09 18:15:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:21,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:21,048 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:21,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:21,248 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1798276511, now seen corresponding path program 94 times [2021-07-09 18:15:21,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:21,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746673783] [2021-07-09 18:15:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:21,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:21,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746673783] [2021-07-09 18:15:21,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746673783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:21,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122413859] [2021-07-09 18:15:21,599 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 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 [2021-07-09 18:15:21,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:21,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:15:21,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122413859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:22,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:22,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:15:22,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784313319] [2021-07-09 18:15:22,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:15:22,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:22,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:15:22,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:15:22,191 INFO L87 Difference]: Start difference. First operand 6588 states and 22194 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:24,132 INFO L93 Difference]: Finished difference Result 8755 states and 28639 transitions. [2021-07-09 18:15:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:15:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:24,150 INFO L225 Difference]: With dead ends: 8755 [2021-07-09 18:15:24,151 INFO L226 Difference]: Without dead ends: 8586 [2021-07-09 18:15:24,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1804.4ms TimeCoverageRelationStatistics Valid=466, Invalid=2726, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:15:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8586 states. [2021-07-09 18:15:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8586 to 6575. [2021-07-09 18:15:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6575 states, 6574 states have (on average 3.3681168238515364) internal successors, (22142), 6574 states have internal predecessors, (22142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6575 states to 6575 states and 22142 transitions. [2021-07-09 18:15:24,303 INFO L78 Accepts]: Start accepts. Automaton has 6575 states and 22142 transitions. Word has length 36 [2021-07-09 18:15:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:24,303 INFO L482 AbstractCegarLoop]: Abstraction has 6575 states and 22142 transitions. [2021-07-09 18:15:24,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6575 states and 22142 transitions. [2021-07-09 18:15:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:24,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:24,313 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:24,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:24,514 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2027978275, now seen corresponding path program 95 times [2021-07-09 18:15:24,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:24,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291119466] [2021-07-09 18:15:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:24,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:24,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291119466] [2021-07-09 18:15:24,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291119466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:24,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806758263] [2021-07-09 18:15:24,836 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 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 [2021-07-09 18:15:24,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:15:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:15:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:25,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806758263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:25,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:25,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:15:25,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195960587] [2021-07-09 18:15:25,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:15:25,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:25,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:15:25,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:15:25,497 INFO L87 Difference]: Start difference. First operand 6575 states and 22142 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,153 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-07-09 18:15:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:27,644 INFO L93 Difference]: Finished difference Result 7631 states and 24928 transitions. [2021-07-09 18:15:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:15:27,644 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:27,659 INFO L225 Difference]: With dead ends: 7631 [2021-07-09 18:15:27,659 INFO L226 Difference]: Without dead ends: 7496 [2021-07-09 18:15:27,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2090.0ms TimeCoverageRelationStatistics Valid=644, Invalid=3778, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:15:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7496 states. [2021-07-09 18:15:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7496 to 6623. [2021-07-09 18:15:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6623 states, 6622 states have (on average 3.3637873754152823) internal successors, (22275), 6622 states have internal predecessors, (22275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 22275 transitions. [2021-07-09 18:15:27,785 INFO L78 Accepts]: Start accepts. Automaton has 6623 states and 22275 transitions. Word has length 36 [2021-07-09 18:15:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:27,785 INFO L482 AbstractCegarLoop]: Abstraction has 6623 states and 22275 transitions. [2021-07-09 18:15:27,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6623 states and 22275 transitions. [2021-07-09 18:15:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:27,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:27,795 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:27,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:27,996 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 39659617, now seen corresponding path program 96 times [2021-07-09 18:15:27,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:27,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283803260] [2021-07-09 18:15:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:28,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283803260] [2021-07-09 18:15:28,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283803260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915374772] [2021-07-09 18:15:28,371 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 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 [2021-07-09 18:15:28,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:15:28,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:28,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:15:28,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:29,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915374772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:29,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:29,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:15:29,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730577802] [2021-07-09 18:15:29,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:15:29,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:15:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:15:29,020 INFO L87 Difference]: Start difference. First operand 6623 states and 22275 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:31,259 INFO L93 Difference]: Finished difference Result 9146 states and 29700 transitions. [2021-07-09 18:15:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:15:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:31,277 INFO L225 Difference]: With dead ends: 9146 [2021-07-09 18:15:31,278 INFO L226 Difference]: Without dead ends: 9039 [2021-07-09 18:15:31,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 2116.8ms TimeCoverageRelationStatistics Valid=542, Invalid=3118, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:15:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-09 18:15:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 6675. [2021-07-09 18:15:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6675 states, 6674 states have (on average 3.3627509739286783) internal successors, (22443), 6674 states have internal predecessors, (22443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6675 states to 6675 states and 22443 transitions. [2021-07-09 18:15:31,402 INFO L78 Accepts]: Start accepts. Automaton has 6675 states and 22443 transitions. Word has length 36 [2021-07-09 18:15:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:31,402 INFO L482 AbstractCegarLoop]: Abstraction has 6675 states and 22443 transitions. [2021-07-09 18:15:31,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6675 states and 22443 transitions. [2021-07-09 18:15:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:31,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:31,413 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:31,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:31,613 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash 624740321, now seen corresponding path program 97 times [2021-07-09 18:15:31,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:31,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767400554] [2021-07-09 18:15:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:31,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:31,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767400554] [2021-07-09 18:15:31,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767400554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:31,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906326547] [2021-07-09 18:15:31,905 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 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 [2021-07-09 18:15:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:15:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:32,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906326547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:32,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:32,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:15:32,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977712441] [2021-07-09 18:15:32,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:32,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:32,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:32,570 INFO L87 Difference]: Start difference. First operand 6675 states and 22443 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:35,831 INFO L93 Difference]: Finished difference Result 9103 states and 29318 transitions. [2021-07-09 18:15:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:15:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:35,848 INFO L225 Difference]: With dead ends: 9103 [2021-07-09 18:15:35,849 INFO L226 Difference]: Without dead ends: 8968 [2021-07-09 18:15:35,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 3030.7ms TimeCoverageRelationStatistics Valid=936, Invalid=6546, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:15:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8968 states. [2021-07-09 18:15:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8968 to 6649. [2021-07-09 18:15:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6648 states have (on average 3.3670276774969916) internal successors, (22384), 6648 states have internal predecessors, (22384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 22384 transitions. [2021-07-09 18:15:35,988 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 22384 transitions. Word has length 36 [2021-07-09 18:15:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:35,988 INFO L482 AbstractCegarLoop]: Abstraction has 6649 states and 22384 transitions. [2021-07-09 18:15:35,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 22384 transitions. [2021-07-09 18:15:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:35,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:35,998 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:36,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-07-09 18:15:36,209 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -58845595, now seen corresponding path program 98 times [2021-07-09 18:15:36,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:36,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525663555] [2021-07-09 18:15:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:36,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:36,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525663555] [2021-07-09 18:15:36,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525663555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:36,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014764398] [2021-07-09 18:15:36,491 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 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 [2021-07-09 18:15:36,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:36,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:15:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:37,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014764398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:37,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:37,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:15:37,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045481348] [2021-07-09 18:15:37,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:15:37,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:15:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:15:37,062 INFO L87 Difference]: Start difference. First operand 6649 states and 22384 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:41,988 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-09 18:15:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:42,511 INFO L93 Difference]: Finished difference Result 10438 states and 33397 transitions. [2021-07-09 18:15:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-09 18:15:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:42,529 INFO L225 Difference]: With dead ends: 10438 [2021-07-09 18:15:42,529 INFO L226 Difference]: Without dead ends: 10257 [2021-07-09 18:15:42,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4092 ImplicationChecksByTransitivity, 4620.9ms TimeCoverageRelationStatistics Valid=1264, Invalid=10726, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:15:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10257 states. [2021-07-09 18:15:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10257 to 6667. [2021-07-09 18:15:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6667 states, 6666 states have (on average 3.37023702370237) internal successors, (22466), 6666 states have internal predecessors, (22466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6667 states to 6667 states and 22466 transitions. [2021-07-09 18:15:42,663 INFO L78 Accepts]: Start accepts. Automaton has 6667 states and 22466 transitions. Word has length 36 [2021-07-09 18:15:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:42,664 INFO L482 AbstractCegarLoop]: Abstraction has 6667 states and 22466 transitions. [2021-07-09 18:15:42,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6667 states and 22466 transitions. [2021-07-09 18:15:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:42,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:42,673 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:42,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:42,877 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash -964881055, now seen corresponding path program 99 times [2021-07-09 18:15:42,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:42,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010632449] [2021-07-09 18:15:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:43,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:43,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010632449] [2021-07-09 18:15:43,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010632449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:43,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368514478] [2021-07-09 18:15:43,201 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 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 [2021-07-09 18:15:43,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:15:43,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:43,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:15:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:43,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368514478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:43,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:43,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:15:43,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898673428] [2021-07-09 18:15:43,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:43,815 INFO L87 Difference]: Start difference. First operand 6667 states and 22466 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:50,540 INFO L93 Difference]: Finished difference Result 13182 states and 41574 transitions. [2021-07-09 18:15:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-09 18:15:50,540 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:50,563 INFO L225 Difference]: With dead ends: 13182 [2021-07-09 18:15:50,563 INFO L226 Difference]: Without dead ends: 12943 [2021-07-09 18:15:50,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5855 ImplicationChecksByTransitivity, 5549.6ms TimeCoverageRelationStatistics Valid=2343, Invalid=14427, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:15:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12943 states. [2021-07-09 18:15:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12943 to 6715. [2021-07-09 18:15:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6715 states, 6714 states have (on average 3.3717605004468276) internal successors, (22638), 6714 states have internal predecessors, (22638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 22638 transitions. [2021-07-09 18:15:50,730 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 22638 transitions. Word has length 36 [2021-07-09 18:15:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:50,730 INFO L482 AbstractCegarLoop]: Abstraction has 6715 states and 22638 transitions. [2021-07-09 18:15:50,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 22638 transitions. [2021-07-09 18:15:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:50,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:50,741 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:50,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:50,941 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:50,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1486345203, now seen corresponding path program 100 times [2021-07-09 18:15:50,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:50,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117292034] [2021-07-09 18:15:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:51,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117292034] [2021-07-09 18:15:51,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117292034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589829427] [2021-07-09 18:15:51,275 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 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 [2021-07-09 18:15:51,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:51,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:51,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:15:51,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:52,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589829427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:52,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:52,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:15:52,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887306465] [2021-07-09 18:15:52,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:52,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:52,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:52,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:52,017 INFO L87 Difference]: Start difference. First operand 6715 states and 22638 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:53,958 INFO L93 Difference]: Finished difference Result 9443 states and 30713 transitions. [2021-07-09 18:15:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:15:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:53,977 INFO L225 Difference]: With dead ends: 9443 [2021-07-09 18:15:53,977 INFO L226 Difference]: Without dead ends: 9362 [2021-07-09 18:15:53,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2023.3ms TimeCoverageRelationStatistics Valid=560, Invalid=3472, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:15:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2021-07-09 18:15:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 6796. [2021-07-09 18:15:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.3711552612214866) internal successors, (22907), 6795 states have internal predecessors, (22907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22907 transitions. [2021-07-09 18:15:54,105 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22907 transitions. Word has length 36 [2021-07-09 18:15:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:54,106 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22907 transitions. [2021-07-09 18:15:54,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22907 transitions. [2021-07-09 18:15:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:54,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:54,116 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:54,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-07-09 18:15:54,316 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1970694925, now seen corresponding path program 101 times [2021-07-09 18:15:54,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:54,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759159431] [2021-07-09 18:15:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:54,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759159431] [2021-07-09 18:15:54,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759159431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248618528] [2021-07-09 18:15:54,628 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 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 [2021-07-09 18:15:54,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:15:54,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:54,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:15:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:55,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248618528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:55,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:55,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:15:55,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759557328] [2021-07-09 18:15:55,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:15:55,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:15:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:15:55,292 INFO L87 Difference]: Start difference. First operand 6796 states and 22907 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:57,999 INFO L93 Difference]: Finished difference Result 8718 states and 28042 transitions. [2021-07-09 18:15:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:15:58,000 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:15:58,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:58,015 INFO L225 Difference]: With dead ends: 8718 [2021-07-09 18:15:58,015 INFO L226 Difference]: Without dead ends: 8583 [2021-07-09 18:15:58,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2488.0ms TimeCoverageRelationStatistics Valid=782, Invalid=5224, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:15:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-07-09 18:15:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 6796. [2021-07-09 18:15:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.3724797645327445) internal successors, (22916), 6795 states have internal predecessors, (22916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22916 transitions. [2021-07-09 18:15:58,134 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22916 transitions. Word has length 36 [2021-07-09 18:15:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:58,134 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22916 transitions. [2021-07-09 18:15:58,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22916 transitions. [2021-07-09 18:15:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:15:58,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:58,144 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:58,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-07-09 18:15:58,345 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1292633105, now seen corresponding path program 102 times [2021-07-09 18:15:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:58,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762484240] [2021-07-09 18:15:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:58,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:58,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762484240] [2021-07-09 18:15:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762484240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:58,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966674988] [2021-07-09 18:15:58,695 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 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 [2021-07-09 18:15:58,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:15:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:15:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:59,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966674988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:59,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:59,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:15:59,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519618161] [2021-07-09 18:15:59,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:15:59,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:59,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:15:59,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:15:59,333 INFO L87 Difference]: Start difference. First operand 6796 states and 22916 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:03,148 INFO L93 Difference]: Finished difference Result 13252 states and 42841 transitions. [2021-07-09 18:16:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:16:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:03,173 INFO L225 Difference]: With dead ends: 13252 [2021-07-09 18:16:03,173 INFO L226 Difference]: Without dead ends: 13138 [2021-07-09 18:16:03,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2761 ImplicationChecksByTransitivity, 3413.1ms TimeCoverageRelationStatistics Valid=1334, Invalid=7038, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:16:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13138 states. [2021-07-09 18:16:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13138 to 6904. [2021-07-09 18:16:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 3.371867304070694) internal successors, (23276), 6903 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 23276 transitions. [2021-07-09 18:16:03,338 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 23276 transitions. Word has length 36 [2021-07-09 18:16:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 6904 states and 23276 transitions. [2021-07-09 18:16:03,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 23276 transitions. [2021-07-09 18:16:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:03,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:03,348 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:03,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-07-09 18:16:03,551 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1584850415, now seen corresponding path program 103 times [2021-07-09 18:16:03,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:03,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841145626] [2021-07-09 18:16:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:03,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841145626] [2021-07-09 18:16:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841145626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:03,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062564755] [2021-07-09 18:16:03,849 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 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 [2021-07-09 18:16:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:03,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:16:03,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:04,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062564755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:04,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:04,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:16:04,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3896495] [2021-07-09 18:16:04,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:04,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:04,480 INFO L87 Difference]: Start difference. First operand 6904 states and 23276 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:09,247 INFO L93 Difference]: Finished difference Result 11066 states and 35302 transitions. [2021-07-09 18:16:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-09 18:16:09,248 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:09,268 INFO L225 Difference]: With dead ends: 11066 [2021-07-09 18:16:09,269 INFO L226 Difference]: Without dead ends: 10917 [2021-07-09 18:16:09,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3544 ImplicationChecksByTransitivity, 4125.1ms TimeCoverageRelationStatistics Valid=1357, Invalid=9355, Unknown=0, NotChecked=0, Total=10712 [2021-07-09 18:16:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2021-07-09 18:16:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 6904. [2021-07-09 18:16:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 3.373315949587136) internal successors, (23286), 6903 states have internal predecessors, (23286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 23286 transitions. [2021-07-09 18:16:09,409 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 23286 transitions. Word has length 36 [2021-07-09 18:16:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:09,410 INFO L482 AbstractCegarLoop]: Abstraction has 6904 states and 23286 transitions. [2021-07-09 18:16:09,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 23286 transitions. [2021-07-09 18:16:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:09,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:09,420 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:09,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-09 18:16:09,621 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -592356851, now seen corresponding path program 104 times [2021-07-09 18:16:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145422475] [2021-07-09 18:16:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:09,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:09,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145422475] [2021-07-09 18:16:09,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145422475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:09,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419791325] [2021-07-09 18:16:09,927 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 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 [2021-07-09 18:16:09,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:09,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:16:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:10,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419791325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:10,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:10,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:16:10,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450968767] [2021-07-09 18:16:10,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:16:10,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:10,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:16:10,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:16:10,548 INFO L87 Difference]: Start difference. First operand 6904 states and 23286 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:15,764 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-09 18:16:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:16,292 INFO L93 Difference]: Finished difference Result 12893 states and 40872 transitions. [2021-07-09 18:16:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:16:16,292 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:16,313 INFO L225 Difference]: With dead ends: 12893 [2021-07-09 18:16:16,313 INFO L226 Difference]: Without dead ends: 12712 [2021-07-09 18:16:16,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 4634.2ms TimeCoverageRelationStatistics Valid=1639, Invalid=11017, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 18:16:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12712 states. [2021-07-09 18:16:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12712 to 6894. [2021-07-09 18:16:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6894 states, 6893 states have (on average 3.372116640069636) internal successors, (23244), 6893 states have internal predecessors, (23244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6894 states to 6894 states and 23244 transitions. [2021-07-09 18:16:16,449 INFO L78 Accepts]: Start accepts. Automaton has 6894 states and 23244 transitions. Word has length 36 [2021-07-09 18:16:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:16,449 INFO L482 AbstractCegarLoop]: Abstraction has 6894 states and 23244 transitions. [2021-07-09 18:16:16,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6894 states and 23244 transitions. [2021-07-09 18:16:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:16,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:16,460 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:16,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-07-09 18:16:16,676 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1104420783, now seen corresponding path program 105 times [2021-07-09 18:16:16,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:16,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088677965] [2021-07-09 18:16:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:17,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:17,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088677965] [2021-07-09 18:16:17,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088677965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:17,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062946977] [2021-07-09 18:16:17,024 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 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 [2021-07-09 18:16:17,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:16:17,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:17,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:16:17,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:17,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062946977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:17,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:17,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:16:17,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095578468] [2021-07-09 18:16:17,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:16:17,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:17,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:16:17,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:16:17,671 INFO L87 Difference]: Start difference. First operand 6894 states and 23244 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:20,490 INFO L93 Difference]: Finished difference Result 13516 states and 44077 transitions. [2021-07-09 18:16:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:16:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:20,519 INFO L225 Difference]: With dead ends: 13516 [2021-07-09 18:16:20,519 INFO L226 Difference]: Without dead ends: 13396 [2021-07-09 18:16:20,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2618.1ms TimeCoverageRelationStatistics Valid=1004, Invalid=4696, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:16:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13396 states. [2021-07-09 18:16:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13396 to 6940. [2021-07-09 18:16:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 6939 states have (on average 3.372532065139069) internal successors, (23402), 6939 states have internal predecessors, (23402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 23402 transitions. [2021-07-09 18:16:20,681 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 23402 transitions. Word has length 36 [2021-07-09 18:16:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:20,681 INFO L482 AbstractCegarLoop]: Abstraction has 6940 states and 23402 transitions. [2021-07-09 18:16:20,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 23402 transitions. [2021-07-09 18:16:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:20,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:20,691 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:20,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-07-09 18:16:20,892 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash -379383343, now seen corresponding path program 106 times [2021-07-09 18:16:20,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:20,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030896625] [2021-07-09 18:16:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:21,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:21,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030896625] [2021-07-09 18:16:21,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030896625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:21,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674578124] [2021-07-09 18:16:21,228 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 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 [2021-07-09 18:16:21,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:21,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:21,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:16:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:21,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674578124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:21,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:21,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:16:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552496947] [2021-07-09 18:16:21,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:16:21,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:16:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:16:21,889 INFO L87 Difference]: Start difference. First operand 6940 states and 23402 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:23,411 INFO L93 Difference]: Finished difference Result 10660 states and 35159 transitions. [2021-07-09 18:16:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:16:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:23,430 INFO L225 Difference]: With dead ends: 10660 [2021-07-09 18:16:23,430 INFO L226 Difference]: Without dead ends: 10540 [2021-07-09 18:16:23,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1555.8ms TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:16:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2021-07-09 18:16:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 6948. [2021-07-09 18:16:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6948 states, 6947 states have (on average 3.3721030660716855) internal successors, (23426), 6947 states have internal predecessors, (23426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6948 states to 6948 states and 23426 transitions. [2021-07-09 18:16:23,564 INFO L78 Accepts]: Start accepts. Automaton has 6948 states and 23426 transitions. Word has length 36 [2021-07-09 18:16:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:23,564 INFO L482 AbstractCegarLoop]: Abstraction has 6948 states and 23426 transitions. [2021-07-09 18:16:23,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6948 states and 23426 transitions. [2021-07-09 18:16:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:23,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:23,575 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:23,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:23,775 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:23,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1952304667, now seen corresponding path program 107 times [2021-07-09 18:16:23,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:23,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412979418] [2021-07-09 18:16:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:24,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:24,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412979418] [2021-07-09 18:16:24,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412979418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:24,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041332749] [2021-07-09 18:16:24,055 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 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 [2021-07-09 18:16:24,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:16:24,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:24,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:16:24,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:24,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041332749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:24,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:24,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:16:24,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528465557] [2021-07-09 18:16:24,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:16:24,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:16:24,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:16:24,656 INFO L87 Difference]: Start difference. First operand 6948 states and 23426 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:27,341 INFO L93 Difference]: Finished difference Result 8582 states and 27857 transitions. [2021-07-09 18:16:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:16:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:27,355 INFO L225 Difference]: With dead ends: 8582 [2021-07-09 18:16:27,355 INFO L226 Difference]: Without dead ends: 8421 [2021-07-09 18:16:27,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2377.6ms TimeCoverageRelationStatistics Valid=700, Invalid=4702, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:16:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8421 states. [2021-07-09 18:16:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8421 to 6966. [2021-07-09 18:16:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 3.371715721464465) internal successors, (23484), 6965 states have internal predecessors, (23484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 23484 transitions. [2021-07-09 18:16:27,473 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 23484 transitions. Word has length 36 [2021-07-09 18:16:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:27,474 INFO L482 AbstractCegarLoop]: Abstraction has 6966 states and 23484 transitions. [2021-07-09 18:16:27,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 23484 transitions. [2021-07-09 18:16:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:27,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:27,484 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:27,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:27,684 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:27,684 INFO L82 PathProgramCache]: Analyzing trace with hash -959811103, now seen corresponding path program 108 times [2021-07-09 18:16:27,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:27,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928527988] [2021-07-09 18:16:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:27,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:27,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928527988] [2021-07-09 18:16:27,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928527988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:27,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475062349] [2021-07-09 18:16:27,954 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 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 [2021-07-09 18:16:27,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:16:27,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:27,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:16:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:28,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475062349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:28,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:28,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:16:28,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834163336] [2021-07-09 18:16:28,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:16:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:16:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:16:28,519 INFO L87 Difference]: Start difference. First operand 6966 states and 23484 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:31,831 INFO L93 Difference]: Finished difference Result 10534 states and 33798 transitions. [2021-07-09 18:16:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:16:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:31,849 INFO L225 Difference]: With dead ends: 10534 [2021-07-09 18:16:31,849 INFO L226 Difference]: Without dead ends: 10338 [2021-07-09 18:16:31,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 2593.1ms TimeCoverageRelationStatistics Valid=939, Invalid=6033, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:16:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10338 states. [2021-07-09 18:16:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10338 to 6968. [2021-07-09 18:16:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6967 states have (on average 3.371609013922779) internal successors, (23490), 6967 states have internal predecessors, (23490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 23490 transitions. [2021-07-09 18:16:32,033 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 23490 transitions. Word has length 36 [2021-07-09 18:16:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:32,033 INFO L482 AbstractCegarLoop]: Abstraction has 6968 states and 23490 transitions. [2021-07-09 18:16:32,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 23490 transitions. [2021-07-09 18:16:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:32,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:32,043 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:32,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:32,244 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:32,244 INFO L82 PathProgramCache]: Analyzing trace with hash 383921037, now seen corresponding path program 109 times [2021-07-09 18:16:32,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:32,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899314217] [2021-07-09 18:16:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:32,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:32,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899314217] [2021-07-09 18:16:32,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899314217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:32,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750158318] [2021-07-09 18:16:32,512 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 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 [2021-07-09 18:16:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:16:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750158318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:33,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:33,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:16:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709293143] [2021-07-09 18:16:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:16:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:16:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:16:33,081 INFO L87 Difference]: Start difference. First operand 6968 states and 23490 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:35,584 INFO L93 Difference]: Finished difference Result 9182 states and 29771 transitions. [2021-07-09 18:16:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:16:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:35,602 INFO L225 Difference]: With dead ends: 9182 [2021-07-09 18:16:35,603 INFO L226 Difference]: Without dead ends: 9021 [2021-07-09 18:16:35,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 2122.3ms TimeCoverageRelationStatistics Valid=758, Invalid=4644, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:16:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9021 states. [2021-07-09 18:16:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9021 to 6978. [2021-07-09 18:16:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6978 states, 6977 states have (on average 3.3715063780994696) internal successors, (23523), 6977 states have internal predecessors, (23523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6978 states to 6978 states and 23523 transitions. [2021-07-09 18:16:35,757 INFO L78 Accepts]: Start accepts. Automaton has 6978 states and 23523 transitions. Word has length 36 [2021-07-09 18:16:35,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:35,757 INFO L482 AbstractCegarLoop]: Abstraction has 6978 states and 23523 transitions. [2021-07-09 18:16:35,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 6978 states and 23523 transitions. [2021-07-09 18:16:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:35,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:35,768 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:35,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable807,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:35,968 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:35,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1101489037, now seen corresponding path program 110 times [2021-07-09 18:16:35,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:35,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554903245] [2021-07-09 18:16:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:36,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:36,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554903245] [2021-07-09 18:16:36,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554903245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:36,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941177562] [2021-07-09 18:16:36,246 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 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 [2021-07-09 18:16:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:16:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:36,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941177562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:36,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:36,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:16:36,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575675921] [2021-07-09 18:16:36,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:16:36,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:36,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:16:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:16:36,774 INFO L87 Difference]: Start difference. First operand 6978 states and 23523 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:39,942 INFO L93 Difference]: Finished difference Result 11789 states and 37843 transitions. [2021-07-09 18:16:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:16:39,942 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:39,962 INFO L225 Difference]: With dead ends: 11789 [2021-07-09 18:16:39,962 INFO L226 Difference]: Without dead ends: 11578 [2021-07-09 18:16:39,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 2640.9ms TimeCoverageRelationStatistics Valid=1029, Invalid=5451, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:16:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11578 states. [2021-07-09 18:16:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11578 to 6982. [2021-07-09 18:16:40,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 3.371580002864919) internal successors, (23537), 6981 states have internal predecessors, (23537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 23537 transitions. [2021-07-09 18:16:40,105 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 23537 transitions. Word has length 36 [2021-07-09 18:16:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:40,105 INFO L482 AbstractCegarLoop]: Abstraction has 6982 states and 23537 transitions. [2021-07-09 18:16:40,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 23537 transitions. [2021-07-09 18:16:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:40,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:40,116 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:40,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-07-09 18:16:40,318 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:40,318 INFO L82 PathProgramCache]: Analyzing trace with hash -717720879, now seen corresponding path program 111 times [2021-07-09 18:16:40,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:40,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026342666] [2021-07-09 18:16:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:40,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:40,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026342666] [2021-07-09 18:16:40,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026342666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:40,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960869209] [2021-07-09 18:16:40,685 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 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 [2021-07-09 18:16:40,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:16:40,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:16:40,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:41,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960869209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:41,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:41,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:16:41,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462364148] [2021-07-09 18:16:41,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:16:41,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:41,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:16:41,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:16:41,201 INFO L87 Difference]: Start difference. First operand 6982 states and 23537 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:43,013 INFO L93 Difference]: Finished difference Result 9638 states and 31831 transitions. [2021-07-09 18:16:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:16:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:43,030 INFO L225 Difference]: With dead ends: 9638 [2021-07-09 18:16:43,030 INFO L226 Difference]: Without dead ends: 9509 [2021-07-09 18:16:43,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1631.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:16:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9509 states. [2021-07-09 18:16:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9509 to 6968. [2021-07-09 18:16:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6967 states have (on average 3.371609013922779) internal successors, (23490), 6967 states have internal predecessors, (23490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 23490 transitions. [2021-07-09 18:16:43,171 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 23490 transitions. Word has length 36 [2021-07-09 18:16:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:43,171 INFO L482 AbstractCegarLoop]: Abstraction has 6968 states and 23490 transitions. [2021-07-09 18:16:43,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 23490 transitions. [2021-07-09 18:16:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:43,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:43,182 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:43,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable815,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:43,382 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash -248849779, now seen corresponding path program 112 times [2021-07-09 18:16:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:43,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534272771] [2021-07-09 18:16:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:43,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:43,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534272771] [2021-07-09 18:16:43,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534272771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:43,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129430929] [2021-07-09 18:16:43,617 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 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 [2021-07-09 18:16:43,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:16:43,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:44,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129430929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:44,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:44,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:16:44,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463577683] [2021-07-09 18:16:44,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:16:44,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:44,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:16:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:16:44,166 INFO L87 Difference]: Start difference. First operand 6968 states and 23490 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:45,826 INFO L93 Difference]: Finished difference Result 11126 states and 36623 transitions. [2021-07-09 18:16:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:16:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:45,849 INFO L225 Difference]: With dead ends: 11126 [2021-07-09 18:16:45,849 INFO L226 Difference]: Without dead ends: 11046 [2021-07-09 18:16:45,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1420.6ms TimeCoverageRelationStatistics Valid=573, Invalid=2619, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:16:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11046 states. [2021-07-09 18:16:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11046 to 6990. [2021-07-09 18:16:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.3707254256689083) internal successors, (23558), 6989 states have internal predecessors, (23558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 23558 transitions. [2021-07-09 18:16:46,010 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 23558 transitions. Word has length 36 [2021-07-09 18:16:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:46,010 INFO L482 AbstractCegarLoop]: Abstraction has 6990 states and 23558 transitions. [2021-07-09 18:16:46,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 23558 transitions. [2021-07-09 18:16:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:46,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:46,021 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:46,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-07-09 18:16:46,221 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash 635016865, now seen corresponding path program 113 times [2021-07-09 18:16:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:46,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900608786] [2021-07-09 18:16:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:46,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:46,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900608786] [2021-07-09 18:16:46,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900608786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:46,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51908798] [2021-07-09 18:16:46,530 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 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 [2021-07-09 18:16:46,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:16:46,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:16:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51908798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:47,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:47,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:16:47,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222383839] [2021-07-09 18:16:47,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:47,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:47,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:47,201 INFO L87 Difference]: Start difference. First operand 6990 states and 23558 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:50,508 INFO L93 Difference]: Finished difference Result 9060 states and 29222 transitions. [2021-07-09 18:16:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:16:50,509 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:50,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:50,528 INFO L225 Difference]: With dead ends: 9060 [2021-07-09 18:16:50,528 INFO L226 Difference]: Without dead ends: 8845 [2021-07-09 18:16:50,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2824.0ms TimeCoverageRelationStatistics Valid=808, Invalid=5834, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:16:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8845 states. [2021-07-09 18:16:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8845 to 7026. [2021-07-09 18:16:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.3702491103202847) internal successors, (23676), 7025 states have internal predecessors, (23676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 23676 transitions. [2021-07-09 18:16:50,679 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 23676 transitions. Word has length 36 [2021-07-09 18:16:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:50,679 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 23676 transitions. [2021-07-09 18:16:50,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 23676 transitions. [2021-07-09 18:16:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:50,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:50,690 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:50,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:50,890 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash 938592157, now seen corresponding path program 114 times [2021-07-09 18:16:50,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:50,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308787154] [2021-07-09 18:16:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:51,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308787154] [2021-07-09 18:16:51,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308787154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687634046] [2021-07-09 18:16:51,178 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 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 [2021-07-09 18:16:51,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:16:51,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:51,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:16:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:51,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687634046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:51,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:51,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:16:51,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7998156] [2021-07-09 18:16:51,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:16:51,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:16:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:16:51,768 INFO L87 Difference]: Start difference. First operand 7026 states and 23676 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:55,722 INFO L93 Difference]: Finished difference Result 10086 states and 32277 transitions. [2021-07-09 18:16:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:16:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:16:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:55,739 INFO L225 Difference]: With dead ends: 10086 [2021-07-09 18:16:55,739 INFO L226 Difference]: Without dead ends: 9810 [2021-07-09 18:16:55,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 2987.6ms TimeCoverageRelationStatistics Valid=963, Invalid=6869, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:16:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-09 18:16:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7046. [2021-07-09 18:16:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 3.372178850248403) internal successors, (23757), 7045 states have internal predecessors, (23757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 23757 transitions. [2021-07-09 18:16:55,872 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 23757 transitions. Word has length 36 [2021-07-09 18:16:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:55,873 INFO L482 AbstractCegarLoop]: Abstraction has 7046 states and 23757 transitions. [2021-07-09 18:16:55,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 23757 transitions. [2021-07-09 18:16:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:16:55,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:55,883 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:56,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:56,084 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -519977399, now seen corresponding path program 115 times [2021-07-09 18:16:56,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:56,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267799840] [2021-07-09 18:16:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:56,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267799840] [2021-07-09 18:16:56,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267799840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729944075] [2021-07-09 18:16:56,407 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 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 [2021-07-09 18:16:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:16:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729944075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:57,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:16:57,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911908271] [2021-07-09 18:16:57,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:57,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:57,027 INFO L87 Difference]: Start difference. First operand 7046 states and 23757 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:00,180 INFO L93 Difference]: Finished difference Result 9110 states and 29420 transitions. [2021-07-09 18:17:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:17:00,180 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:00,197 INFO L225 Difference]: With dead ends: 9110 [2021-07-09 18:17:00,197 INFO L226 Difference]: Without dead ends: 8895 [2021-07-09 18:17:00,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 2795.6ms TimeCoverageRelationStatistics Valid=963, Invalid=6009, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:17:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8895 states. [2021-07-09 18:17:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8895 to 7070. [2021-07-09 18:17:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.3709152638279813) internal successors, (23829), 7069 states have internal predecessors, (23829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 23829 transitions. [2021-07-09 18:17:00,320 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 23829 transitions. Word has length 36 [2021-07-09 18:17:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:00,320 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 23829 transitions. [2021-07-09 18:17:00,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 23829 transitions. [2021-07-09 18:17:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:00,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:00,331 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:00,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable842,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,533 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1868103241, now seen corresponding path program 116 times [2021-07-09 18:17:00,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:00,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163991987] [2021-07-09 18:17:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:00,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:00,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163991987] [2021-07-09 18:17:00,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163991987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:00,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881998342] [2021-07-09 18:17:00,873 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 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 [2021-07-09 18:17:00,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:17:00,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881998342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:01,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:17:01,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101845193] [2021-07-09 18:17:01,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:17:01,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:17:01,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:01,440 INFO L87 Difference]: Start difference. First operand 7070 states and 23829 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:06,753 INFO L93 Difference]: Finished difference Result 12000 states and 38137 transitions. [2021-07-09 18:17:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:17:06,753 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:06,775 INFO L225 Difference]: With dead ends: 12000 [2021-07-09 18:17:06,775 INFO L226 Difference]: Without dead ends: 11719 [2021-07-09 18:17:06,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 4409.7ms TimeCoverageRelationStatistics Valid=1878, Invalid=11004, Unknown=0, NotChecked=0, Total=12882 [2021-07-09 18:17:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11719 states. [2021-07-09 18:17:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11719 to 7096. [2021-07-09 18:17:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 7095 states have (on average 3.3722339675828046) internal successors, (23926), 7095 states have internal predecessors, (23926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 23926 transitions. [2021-07-09 18:17:06,948 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 23926 transitions. Word has length 36 [2021-07-09 18:17:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:06,949 INFO L482 AbstractCegarLoop]: Abstraction has 7096 states and 23926 transitions. [2021-07-09 18:17:06,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 23926 transitions. [2021-07-09 18:17:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:06,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:06,959 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:07,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable846 [2021-07-09 18:17:07,160 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1659063437, now seen corresponding path program 117 times [2021-07-09 18:17:07,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:07,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216818739] [2021-07-09 18:17:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:07,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:07,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216818739] [2021-07-09 18:17:07,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216818739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:07,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794434060] [2021-07-09 18:17:07,469 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 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 [2021-07-09 18:17:07,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:17:07,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:17:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794434060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:08,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:17:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846489531] [2021-07-09 18:17:08,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:17:08,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:17:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:17:08,032 INFO L87 Difference]: Start difference. First operand 7096 states and 23926 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:10,888 INFO L93 Difference]: Finished difference Result 9477 states and 30670 transitions. [2021-07-09 18:17:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:17:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:10,906 INFO L225 Difference]: With dead ends: 9477 [2021-07-09 18:17:10,906 INFO L226 Difference]: Without dead ends: 9281 [2021-07-09 18:17:10,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2381.1ms TimeCoverageRelationStatistics Valid=778, Invalid=5228, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:17:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9281 states. [2021-07-09 18:17:11,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9281 to 7084. [2021-07-09 18:17:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7084 states, 7083 states have (on average 3.3727234222786953) internal successors, (23889), 7083 states have internal predecessors, (23889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 23889 transitions. [2021-07-09 18:17:11,072 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 23889 transitions. Word has length 36 [2021-07-09 18:17:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:11,072 INFO L482 AbstractCegarLoop]: Abstraction has 7084 states and 23889 transitions. [2021-07-09 18:17:11,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 23889 transitions. [2021-07-09 18:17:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:11,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:11,082 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:11,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-07-09 18:17:11,283 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash 627531557, now seen corresponding path program 118 times [2021-07-09 18:17:11,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:11,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027180816] [2021-07-09 18:17:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:11,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:11,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027180816] [2021-07-09 18:17:11,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027180816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880229533] [2021-07-09 18:17:11,637 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 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 [2021-07-09 18:17:11,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:11,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:11,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:17:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:12,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880229533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:12,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:12,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:17:12,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57800041] [2021-07-09 18:17:12,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:17:12,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:17:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:17:12,184 INFO L87 Difference]: Start difference. First operand 7084 states and 23889 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:14,218 INFO L93 Difference]: Finished difference Result 10217 states and 33507 transitions. [2021-07-09 18:17:14,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:17:14,218 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:14,238 INFO L225 Difference]: With dead ends: 10217 [2021-07-09 18:17:14,238 INFO L226 Difference]: Without dead ends: 10048 [2021-07-09 18:17:14,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1843.4ms TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:17:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10048 states. [2021-07-09 18:17:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10048 to 7054. [2021-07-09 18:17:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.3720402665532396) internal successors, (23783), 7053 states have internal predecessors, (23783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 23783 transitions. [2021-07-09 18:17:14,371 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 23783 transitions. Word has length 36 [2021-07-09 18:17:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:14,371 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 23783 transitions. [2021-07-09 18:17:14,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 23783 transitions. [2021-07-09 18:17:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:14,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:14,381 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:14,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:14,582 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash 756399901, now seen corresponding path program 119 times [2021-07-09 18:17:14,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:14,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944067033] [2021-07-09 18:17:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:14,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:14,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944067033] [2021-07-09 18:17:14,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944067033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:14,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298255949] [2021-07-09 18:17:14,925 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 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 [2021-07-09 18:17:14,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:17:14,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:17:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:15,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298255949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:15,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-09 18:17:15,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269889788] [2021-07-09 18:17:15,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:17:15,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:17:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:17:15,563 INFO L87 Difference]: Start difference. First operand 7054 states and 23783 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:17,869 INFO L93 Difference]: Finished difference Result 11505 states and 37707 transitions. [2021-07-09 18:17:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:17:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:17,892 INFO L225 Difference]: With dead ends: 11505 [2021-07-09 18:17:17,893 INFO L226 Difference]: Without dead ends: 11444 [2021-07-09 18:17:17,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 2171.3ms TimeCoverageRelationStatistics Valid=611, Invalid=4081, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:17:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11444 states. [2021-07-09 18:17:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11444 to 7228. [2021-07-09 18:17:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7228 states, 7227 states have (on average 3.3659886536598864) internal successors, (24326), 7227 states have internal predecessors, (24326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7228 states to 7228 states and 24326 transitions. [2021-07-09 18:17:18,045 INFO L78 Accepts]: Start accepts. Automaton has 7228 states and 24326 transitions. Word has length 36 [2021-07-09 18:17:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:18,045 INFO L482 AbstractCegarLoop]: Abstraction has 7228 states and 24326 transitions. [2021-07-09 18:17:18,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7228 states and 24326 transitions. [2021-07-09 18:17:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:18,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:18,056 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:18,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-07-09 18:17:18,260 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1270845923, now seen corresponding path program 120 times [2021-07-09 18:17:18,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:18,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297071993] [2021-07-09 18:17:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:18,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:18,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297071993] [2021-07-09 18:17:18,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297071993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:18,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054939747] [2021-07-09 18:17:18,635 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 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 [2021-07-09 18:17:18,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:18,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:17:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:19,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054939747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:19,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:19,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:17:19,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877788120] [2021-07-09 18:17:19,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:17:19,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:17:19,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:17:19,225 INFO L87 Difference]: Start difference. First operand 7228 states and 24326 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:22,621 INFO L93 Difference]: Finished difference Result 14809 states and 47701 transitions. [2021-07-09 18:17:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:17:22,621 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:22,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:22,649 INFO L225 Difference]: With dead ends: 14809 [2021-07-09 18:17:22,649 INFO L226 Difference]: Without dead ends: 14689 [2021-07-09 18:17:22,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 3002.0ms TimeCoverageRelationStatistics Valid=1114, Invalid=5366, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:17:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14689 states. [2021-07-09 18:17:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14689 to 7311. [2021-07-09 18:17:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7311 states, 7310 states have (on average 3.3667578659370725) internal successors, (24611), 7310 states have internal predecessors, (24611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7311 states to 7311 states and 24611 transitions. [2021-07-09 18:17:22,822 INFO L78 Accepts]: Start accepts. Automaton has 7311 states and 24611 transitions. Word has length 36 [2021-07-09 18:17:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:22,822 INFO L482 AbstractCegarLoop]: Abstraction has 7311 states and 24611 transitions. [2021-07-09 18:17:22,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 7311 states and 24611 transitions. [2021-07-09 18:17:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:22,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:22,833 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:23,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:23,033 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:23,034 INFO L82 PathProgramCache]: Analyzing trace with hash 13295137, now seen corresponding path program 121 times [2021-07-09 18:17:23,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:23,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417764605] [2021-07-09 18:17:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:23,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:23,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417764605] [2021-07-09 18:17:23,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417764605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:23,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605968352] [2021-07-09 18:17:23,304 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 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 [2021-07-09 18:17:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:23,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:17:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:23,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605968352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:23,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:23,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:17:23,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602069075] [2021-07-09 18:17:23,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:17:23,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:17:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:23,913 INFO L87 Difference]: Start difference. First operand 7311 states and 24611 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:28,585 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-09 18:17:29,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:29,050 INFO L93 Difference]: Finished difference Result 15156 states and 47855 transitions. [2021-07-09 18:17:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-09 18:17:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:29,077 INFO L225 Difference]: With dead ends: 15156 [2021-07-09 18:17:29,077 INFO L226 Difference]: Without dead ends: 15007 [2021-07-09 18:17:29,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4359 ImplicationChecksByTransitivity, 4462.2ms TimeCoverageRelationStatistics Valid=1899, Invalid=10533, Unknown=0, NotChecked=0, Total=12432 [2021-07-09 18:17:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15007 states. [2021-07-09 18:17:29,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15007 to 7453. [2021-07-09 18:17:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.3699677938808374) internal successors, (25113), 7452 states have internal predecessors, (25113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 25113 transitions. [2021-07-09 18:17:29,293 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 25113 transitions. Word has length 36 [2021-07-09 18:17:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:29,293 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 25113 transitions. [2021-07-09 18:17:29,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 25113 transitions. [2021-07-09 18:17:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:29,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:29,302 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:29,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable870,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:29,503 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:29,503 INFO L82 PathProgramCache]: Analyzing trace with hash 934997277, now seen corresponding path program 122 times [2021-07-09 18:17:29,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:29,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532697541] [2021-07-09 18:17:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:29,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:29,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532697541] [2021-07-09 18:17:29,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532697541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:29,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512010768] [2021-07-09 18:17:29,782 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 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 [2021-07-09 18:17:29,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:17:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:30,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512010768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:30,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:30,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:17:30,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738739710] [2021-07-09 18:17:30,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:17:30,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:17:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:17:30,325 INFO L87 Difference]: Start difference. First operand 7453 states and 25113 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:35,951 INFO L93 Difference]: Finished difference Result 15744 states and 49708 transitions. [2021-07-09 18:17:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:17:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:35,980 INFO L225 Difference]: With dead ends: 15744 [2021-07-09 18:17:35,980 INFO L226 Difference]: Without dead ends: 15526 [2021-07-09 18:17:35,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4412 ImplicationChecksByTransitivity, 4687.8ms TimeCoverageRelationStatistics Valid=2050, Invalid=10606, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 18:17:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15526 states. [2021-07-09 18:17:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15526 to 7376. [2021-07-09 18:17:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.3716610169491523) internal successors, (24866), 7375 states have internal predecessors, (24866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24866 transitions. [2021-07-09 18:17:36,160 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24866 transitions. Word has length 36 [2021-07-09 18:17:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:36,161 INFO L482 AbstractCegarLoop]: Abstraction has 7376 states and 24866 transitions. [2021-07-09 18:17:36,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24866 transitions. [2021-07-09 18:17:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:36,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:36,171 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:36,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable874 [2021-07-09 18:17:36,372 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:36,372 INFO L82 PathProgramCache]: Analyzing trace with hash -421189319, now seen corresponding path program 123 times [2021-07-09 18:17:36,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:36,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518061550] [2021-07-09 18:17:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:36,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:36,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518061550] [2021-07-09 18:17:36,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518061550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:36,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062185707] [2021-07-09 18:17:36,688 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 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 [2021-07-09 18:17:36,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:36,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:17:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062185707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:37,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:37,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:17:37,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805208589] [2021-07-09 18:17:37,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:17:37,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:37,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:17:37,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:17:37,331 INFO L87 Difference]: Start difference. First operand 7376 states and 24866 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:39,474 INFO L93 Difference]: Finished difference Result 10007 states and 32835 transitions. [2021-07-09 18:17:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:17:39,475 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:39,493 INFO L225 Difference]: With dead ends: 10007 [2021-07-09 18:17:39,493 INFO L226 Difference]: Without dead ends: 9893 [2021-07-09 18:17:39,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1948.5ms TimeCoverageRelationStatistics Valid=548, Invalid=3234, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:17:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9893 states. [2021-07-09 18:17:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9893 to 7503. [2021-07-09 18:17:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7503 states, 7502 states have (on average 3.374566782191416) internal successors, (25316), 7502 states have internal predecessors, (25316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7503 states to 7503 states and 25316 transitions. [2021-07-09 18:17:39,635 INFO L78 Accepts]: Start accepts. Automaton has 7503 states and 25316 transitions. Word has length 36 [2021-07-09 18:17:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:39,635 INFO L482 AbstractCegarLoop]: Abstraction has 7503 states and 25316 transitions. [2021-07-09 18:17:39,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7503 states and 25316 transitions. [2021-07-09 18:17:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:39,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:39,646 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:39,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:39,847 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:39,848 INFO L82 PathProgramCache]: Analyzing trace with hash 430402785, now seen corresponding path program 124 times [2021-07-09 18:17:39,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:39,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943501566] [2021-07-09 18:17:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:40,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:40,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943501566] [2021-07-09 18:17:40,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943501566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:40,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601003699] [2021-07-09 18:17:40,185 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 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 [2021-07-09 18:17:40,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:17:40,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:40,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601003699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:40,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:40,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:17:40,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054037615] [2021-07-09 18:17:40,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:17:40,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:17:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:17:40,881 INFO L87 Difference]: Start difference. First operand 7503 states and 25316 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:42,979 INFO L93 Difference]: Finished difference Result 13800 states and 45369 transitions. [2021-07-09 18:17:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:17:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:43,007 INFO L225 Difference]: With dead ends: 13800 [2021-07-09 18:17:43,007 INFO L226 Difference]: Without dead ends: 13680 [2021-07-09 18:17:43,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1986.5ms TimeCoverageRelationStatistics Valid=606, Invalid=3054, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:17:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13680 states. [2021-07-09 18:17:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13680 to 7522. [2021-07-09 18:17:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7522 states, 7521 states have (on average 3.37481717856668) internal successors, (25382), 7521 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7522 states to 7522 states and 25382 transitions. [2021-07-09 18:17:43,173 INFO L78 Accepts]: Start accepts. Automaton has 7522 states and 25382 transitions. Word has length 36 [2021-07-09 18:17:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:43,173 INFO L482 AbstractCegarLoop]: Abstraction has 7522 states and 25382 transitions. [2021-07-09 18:17:43,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7522 states and 25382 transitions. [2021-07-09 18:17:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:43,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:43,184 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:43,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-07-09 18:17:43,388 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1142518539, now seen corresponding path program 125 times [2021-07-09 18:17:43,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:43,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434684120] [2021-07-09 18:17:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:43,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:43,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434684120] [2021-07-09 18:17:43,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434684120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:43,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93577085] [2021-07-09 18:17:43,664 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 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 [2021-07-09 18:17:43,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:17:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:17:43,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:44,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93577085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:44,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:44,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:17:44,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398657163] [2021-07-09 18:17:44,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:17:44,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:17:44,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:44,295 INFO L87 Difference]: Start difference. First operand 7522 states and 25382 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:48,021 INFO L93 Difference]: Finished difference Result 11084 states and 35678 transitions. [2021-07-09 18:17:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:17:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:48,040 INFO L225 Difference]: With dead ends: 11084 [2021-07-09 18:17:48,040 INFO L226 Difference]: Without dead ends: 10923 [2021-07-09 18:17:48,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 3312.2ms TimeCoverageRelationStatistics Valid=1072, Invalid=7484, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:17:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2021-07-09 18:17:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 7569. [2021-07-09 18:17:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7569 states, 7568 states have (on average 3.376321353065539) internal successors, (25552), 7568 states have internal predecessors, (25552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7569 states to 7569 states and 25552 transitions. [2021-07-09 18:17:48,180 INFO L78 Accepts]: Start accepts. Automaton has 7569 states and 25552 transitions. Word has length 36 [2021-07-09 18:17:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:48,180 INFO L482 AbstractCegarLoop]: Abstraction has 7569 states and 25552 transitions. [2021-07-09 18:17:48,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7569 states and 25552 transitions. [2021-07-09 18:17:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:48,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:48,190 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:48,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-07-09 18:17:48,397 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -150024975, now seen corresponding path program 126 times [2021-07-09 18:17:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:48,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806471462] [2021-07-09 18:17:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:48,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:48,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806471462] [2021-07-09 18:17:48,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806471462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:48,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145611937] [2021-07-09 18:17:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:17:48,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:48,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:17:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:49,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145611937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:49,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:49,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:17:49,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452011933] [2021-07-09 18:17:49,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:17:49,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:49,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:17:49,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:17:49,213 INFO L87 Difference]: Start difference. First operand 7569 states and 25552 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:53,218 INFO L93 Difference]: Finished difference Result 12384 states and 39625 transitions. [2021-07-09 18:17:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:17:53,218 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:53,241 INFO L225 Difference]: With dead ends: 12384 [2021-07-09 18:17:53,241 INFO L226 Difference]: Without dead ends: 12188 [2021-07-09 18:17:53,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2943 ImplicationChecksByTransitivity, 3241.6ms TimeCoverageRelationStatistics Valid=1182, Invalid=7938, Unknown=0, NotChecked=0, Total=9120 [2021-07-09 18:17:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12188 states. [2021-07-09 18:17:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12188 to 7569. [2021-07-09 18:17:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7569 states, 7568 states have (on average 3.376321353065539) internal successors, (25552), 7568 states have internal predecessors, (25552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7569 states to 7569 states and 25552 transitions. [2021-07-09 18:17:53,421 INFO L78 Accepts]: Start accepts. Automaton has 7569 states and 25552 transitions. Word has length 36 [2021-07-09 18:17:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:53,421 INFO L482 AbstractCegarLoop]: Abstraction has 7569 states and 25552 transitions. [2021-07-09 18:17:53,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7569 states and 25552 transitions. [2021-07-09 18:17:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:53,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:53,432 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:53,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable896 [2021-07-09 18:17:53,633 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1193707165, now seen corresponding path program 127 times [2021-07-09 18:17:53,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:53,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127646422] [2021-07-09 18:17:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:53,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:53,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127646422] [2021-07-09 18:17:53,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127646422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:53,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943367700] [2021-07-09 18:17:53,897 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 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 [2021-07-09 18:17:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:17:53,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:54,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943367700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:54,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:54,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:17:54,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628502670] [2021-07-09 18:17:54,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:17:54,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:54,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:17:54,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:54,476 INFO L87 Difference]: Start difference. First operand 7569 states and 25552 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:57,634 INFO L93 Difference]: Finished difference Result 10468 states and 33900 transitions. [2021-07-09 18:17:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:17:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:17:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:57,653 INFO L225 Difference]: With dead ends: 10468 [2021-07-09 18:17:57,653 INFO L226 Difference]: Without dead ends: 10307 [2021-07-09 18:17:57,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2752.6ms TimeCoverageRelationStatistics Valid=983, Invalid=6327, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:17:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10307 states. [2021-07-09 18:17:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10307 to 7589. [2021-07-09 18:17:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.375724828676858) internal successors, (25615), 7588 states have internal predecessors, (25615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25615 transitions. [2021-07-09 18:17:57,796 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25615 transitions. Word has length 36 [2021-07-09 18:17:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:57,797 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 25615 transitions. [2021-07-09 18:17:57,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25615 transitions. [2021-07-09 18:17:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:17:57,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:57,808 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:58,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:58,009 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1911275165, now seen corresponding path program 128 times [2021-07-09 18:17:58,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:58,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350630577] [2021-07-09 18:17:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:58,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350630577] [2021-07-09 18:17:58,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350630577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31406700] [2021-07-09 18:17:58,273 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 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 [2021-07-09 18:17:58,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:17:58,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:58,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31406700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:58,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:58,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:17:58,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791555973] [2021-07-09 18:17:58,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:17:58,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:58,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:17:58,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:17:58,846 INFO L87 Difference]: Start difference. First operand 7589 states and 25615 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:02,658 INFO L93 Difference]: Finished difference Result 12946 states and 41603 transitions. [2021-07-09 18:18:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:18:02,658 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:02,681 INFO L225 Difference]: With dead ends: 12946 [2021-07-09 18:18:02,681 INFO L226 Difference]: Without dead ends: 12735 [2021-07-09 18:18:02,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 3220.3ms TimeCoverageRelationStatistics Valid=1319, Invalid=7237, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:18:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12735 states. [2021-07-09 18:18:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12735 to 7593. [2021-07-09 18:18:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7592 states have (on average 3.375790305584826) internal successors, (25629), 7592 states have internal predecessors, (25629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 25629 transitions. [2021-07-09 18:18:02,839 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 25629 transitions. Word has length 36 [2021-07-09 18:18:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:02,839 INFO L482 AbstractCegarLoop]: Abstraction has 7593 states and 25629 transitions. [2021-07-09 18:18:02,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 25629 transitions. [2021-07-09 18:18:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:02,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:02,851 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:03,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:03,051 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash 92065249, now seen corresponding path program 129 times [2021-07-09 18:18:03,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:03,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000701486] [2021-07-09 18:18:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:03,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:03,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000701486] [2021-07-09 18:18:03,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000701486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:03,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407681757] [2021-07-09 18:18:03,416 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 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 [2021-07-09 18:18:03,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:18:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:03,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:03,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407681757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:03,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:03,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:18:03,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860168348] [2021-07-09 18:18:03,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:18:03,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:03,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:18:03,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:18:03,955 INFO L87 Difference]: Start difference. First operand 7593 states and 25629 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:06,293 INFO L93 Difference]: Finished difference Result 11841 states and 39133 transitions. [2021-07-09 18:18:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:18:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:06,314 INFO L225 Difference]: With dead ends: 11841 [2021-07-09 18:18:06,315 INFO L226 Difference]: Without dead ends: 11712 [2021-07-09 18:18:06,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2036.7ms TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:18:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2021-07-09 18:18:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 7577. [2021-07-09 18:18:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.3759239704329462) internal successors, (25576), 7576 states have internal predecessors, (25576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 25576 transitions. [2021-07-09 18:18:06,455 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 25576 transitions. Word has length 36 [2021-07-09 18:18:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:06,455 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 25576 transitions. [2021-07-09 18:18:06,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 25576 transitions. [2021-07-09 18:18:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:06,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:06,466 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:06,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable908 [2021-07-09 18:18:06,667 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash 560936349, now seen corresponding path program 130 times [2021-07-09 18:18:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:06,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498097304] [2021-07-09 18:18:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:06,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:06,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498097304] [2021-07-09 18:18:06,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498097304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:06,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797144374] [2021-07-09 18:18:06,902 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 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 [2021-07-09 18:18:06,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:06,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:07,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797144374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:07,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:07,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:18:07,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084943645] [2021-07-09 18:18:07,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:18:07,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:07,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:18:07,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:18:07,479 INFO L87 Difference]: Start difference. First operand 7577 states and 25576 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:09,482 INFO L93 Difference]: Finished difference Result 16016 states and 53068 transitions. [2021-07-09 18:18:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:18:09,482 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:09,516 INFO L225 Difference]: With dead ends: 16016 [2021-07-09 18:18:09,516 INFO L226 Difference]: Without dead ends: 15936 [2021-07-09 18:18:09,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1701.6ms TimeCoverageRelationStatistics Valid=751, Invalid=3281, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:18:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15936 states. [2021-07-09 18:18:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15936 to 8294. [2021-07-09 18:18:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8294 states, 8293 states have (on average 3.406125648136983) internal successors, (28247), 8293 states have internal predecessors, (28247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8294 states to 8294 states and 28247 transitions. [2021-07-09 18:18:09,738 INFO L78 Accepts]: Start accepts. Automaton has 8294 states and 28247 transitions. Word has length 36 [2021-07-09 18:18:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:09,738 INFO L482 AbstractCegarLoop]: Abstraction has 8294 states and 28247 transitions. [2021-07-09 18:18:09,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8294 states and 28247 transitions. [2021-07-09 18:18:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:09,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:09,751 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:09,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-09 18:18:09,951 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash 597695217, now seen corresponding path program 131 times [2021-07-09 18:18:09,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:09,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201660311] [2021-07-09 18:18:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:10,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:10,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201660311] [2021-07-09 18:18:10,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201660311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:10,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151504833] [2021-07-09 18:18:10,310 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 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 [2021-07-09 18:18:10,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:10,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:10,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:18:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:10,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151504833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:10,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:10,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:18:10,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919166787] [2021-07-09 18:18:10,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:18:10,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:18:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:18:10,924 INFO L87 Difference]: Start difference. First operand 8294 states and 28247 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:12,433 INFO L93 Difference]: Finished difference Result 14986 states and 49691 transitions. [2021-07-09 18:18:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:18:12,433 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:12,462 INFO L225 Difference]: With dead ends: 14986 [2021-07-09 18:18:12,462 INFO L226 Difference]: Without dead ends: 14906 [2021-07-09 18:18:12,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1546.6ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:18:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14906 states. [2021-07-09 18:18:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14906 to 8282. [2021-07-09 18:18:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8281 states have (on average 3.400917763555126) internal successors, (28163), 8281 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) [2021-07-09 18:18:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 28163 transitions. [2021-07-09 18:18:12,645 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 28163 transitions. Word has length 36 [2021-07-09 18:18:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:12,645 INFO L482 AbstractCegarLoop]: Abstraction has 8282 states and 28163 transitions. [2021-07-09 18:18:12,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 28163 transitions. [2021-07-09 18:18:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:12,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:12,658 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:12,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:12,858 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:12,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:12,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1798102489, now seen corresponding path program 132 times [2021-07-09 18:18:12,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:12,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617471080] [2021-07-09 18:18:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:13,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:13,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617471080] [2021-07-09 18:18:13,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617471080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:13,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931933977] [2021-07-09 18:18:13,153 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 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 [2021-07-09 18:18:13,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:18:13,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:18:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:13,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931933977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:13,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:13,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:18:13,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573694009] [2021-07-09 18:18:13,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:18:13,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:13,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:18:13,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:18:13,773 INFO L87 Difference]: Start difference. First operand 8282 states and 28163 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:19,161 INFO L93 Difference]: Finished difference Result 14823 states and 47560 transitions. [2021-07-09 18:18:19,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 18:18:19,161 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:19,187 INFO L225 Difference]: With dead ends: 14823 [2021-07-09 18:18:19,188 INFO L226 Difference]: Without dead ends: 14544 [2021-07-09 18:18:19,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 3892.4ms TimeCoverageRelationStatistics Valid=1460, Invalid=10530, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:18:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14544 states. [2021-07-09 18:18:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14544 to 8334. [2021-07-09 18:18:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8334 states, 8333 states have (on average 3.40465618624745) internal successors, (28371), 8333 states have internal predecessors, (28371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8334 states to 8334 states and 28371 transitions. [2021-07-09 18:18:19,370 INFO L78 Accepts]: Start accepts. Automaton has 8334 states and 28371 transitions. Word has length 36 [2021-07-09 18:18:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:19,370 INFO L482 AbstractCegarLoop]: Abstraction has 8334 states and 28371 transitions. [2021-07-09 18:18:19,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 8334 states and 28371 transitions. [2021-07-09 18:18:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:19,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:19,383 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:19,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-07-09 18:18:19,584 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:19,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1447477403, now seen corresponding path program 133 times [2021-07-09 18:18:19,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:19,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648742926] [2021-07-09 18:18:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:19,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:19,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648742926] [2021-07-09 18:18:19,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648742926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:19,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2487027] [2021-07-09 18:18:19,818 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 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 [2021-07-09 18:18:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:18:19,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:20,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2487027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:20,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:20,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:18:20,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244581474] [2021-07-09 18:18:20,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:18:20,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:18:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:18:20,480 INFO L87 Difference]: Start difference. First operand 8334 states and 28371 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:25,205 INFO L93 Difference]: Finished difference Result 16304 states and 51950 transitions. [2021-07-09 18:18:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:18:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:25,236 INFO L225 Difference]: With dead ends: 16304 [2021-07-09 18:18:25,236 INFO L226 Difference]: Without dead ends: 16158 [2021-07-09 18:18:25,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3754 ImplicationChecksByTransitivity, 3758.3ms TimeCoverageRelationStatistics Valid=1759, Invalid=9583, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:18:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2021-07-09 18:18:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 8345. [2021-07-09 18:18:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8345 states, 8344 states have (on average 3.405680728667306) internal successors, (28417), 8344 states have internal predecessors, (28417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 28417 transitions. [2021-07-09 18:18:25,434 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 28417 transitions. Word has length 36 [2021-07-09 18:18:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:25,434 INFO L482 AbstractCegarLoop]: Abstraction has 8345 states and 28417 transitions. [2021-07-09 18:18:25,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 28417 transitions. [2021-07-09 18:18:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:25,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:25,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:25,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-07-09 18:18:25,647 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:25,648 INFO L82 PathProgramCache]: Analyzing trace with hash -525775263, now seen corresponding path program 134 times [2021-07-09 18:18:25,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:25,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898609822] [2021-07-09 18:18:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:25,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:25,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898609822] [2021-07-09 18:18:25,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898609822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:25,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051204698] [2021-07-09 18:18:25,888 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 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 [2021-07-09 18:18:25,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:25,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:25,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:18:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:26,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051204698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:26,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:26,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:18:26,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957842728] [2021-07-09 18:18:26,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:18:26,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:26,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:18:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:18:26,509 INFO L87 Difference]: Start difference. First operand 8345 states and 28417 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:31,806 INFO L93 Difference]: Finished difference Result 16648 states and 53060 transitions. [2021-07-09 18:18:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-09 18:18:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:31,839 INFO L225 Difference]: With dead ends: 16648 [2021-07-09 18:18:31,840 INFO L226 Difference]: Without dead ends: 16476 [2021-07-09 18:18:31,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4021 ImplicationChecksByTransitivity, 4030.3ms TimeCoverageRelationStatistics Valid=1972, Invalid=10018, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:18:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16476 states. [2021-07-09 18:18:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16476 to 8338. [2021-07-09 18:18:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 3.4049418255967376) internal successors, (28387), 8337 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 28387 transitions. [2021-07-09 18:18:32,049 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 28387 transitions. Word has length 36 [2021-07-09 18:18:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:32,049 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 28387 transitions. [2021-07-09 18:18:32,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 28387 transitions. [2021-07-09 18:18:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:32,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:32,061 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:32,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable939,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:32,262 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1321680997, now seen corresponding path program 135 times [2021-07-09 18:18:32,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:32,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29002789] [2021-07-09 18:18:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:32,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:32,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29002789] [2021-07-09 18:18:32,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29002789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:32,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713537242] [2021-07-09 18:18:32,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:18:32,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:32,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:32,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:18:32,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:33,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713537242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:33,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:33,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:18:33,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315858720] [2021-07-09 18:18:33,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:18:33,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:33,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:18:33,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:18:33,218 INFO L87 Difference]: Start difference. First operand 8338 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:36,620 INFO L93 Difference]: Finished difference Result 13694 states and 44217 transitions. [2021-07-09 18:18:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:18:36,621 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:36,647 INFO L225 Difference]: With dead ends: 13694 [2021-07-09 18:18:36,647 INFO L226 Difference]: Without dead ends: 13550 [2021-07-09 18:18:36,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 2769.5ms TimeCoverageRelationStatistics Valid=1012, Invalid=5468, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:18:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13550 states. [2021-07-09 18:18:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13550 to 8370. [2021-07-09 18:18:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8370 states, 8369 states have (on average 3.407217110765922) internal successors, (28515), 8369 states have internal predecessors, (28515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8370 states to 8370 states and 28515 transitions. [2021-07-09 18:18:36,834 INFO L78 Accepts]: Start accepts. Automaton has 8370 states and 28515 transitions. Word has length 36 [2021-07-09 18:18:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:36,834 INFO L482 AbstractCegarLoop]: Abstraction has 8370 states and 28515 transitions. [2021-07-09 18:18:36,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 8370 states and 28515 transitions. [2021-07-09 18:18:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:36,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:36,846 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:37,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:37,047 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash -767443099, now seen corresponding path program 136 times [2021-07-09 18:18:37,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:37,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147290949] [2021-07-09 18:18:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:37,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:37,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147290949] [2021-07-09 18:18:37,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147290949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:37,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559554994] [2021-07-09 18:18:37,336 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 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 [2021-07-09 18:18:37,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:37,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:18:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:37,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559554994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:37,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:37,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:18:37,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402164922] [2021-07-09 18:18:37,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:18:37,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:37,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:18:37,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:18:37,987 INFO L87 Difference]: Start difference. First operand 8370 states and 28515 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:42,083 INFO L93 Difference]: Finished difference Result 16258 states and 51825 transitions. [2021-07-09 18:18:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:18:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:42,115 INFO L225 Difference]: With dead ends: 16258 [2021-07-09 18:18:42,120 INFO L226 Difference]: Without dead ends: 16112 [2021-07-09 18:18:42,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 3264.3ms TimeCoverageRelationStatistics Valid=1520, Invalid=7600, Unknown=0, NotChecked=0, Total=9120 [2021-07-09 18:18:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16112 states. [2021-07-09 18:18:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16112 to 8373. [2021-07-09 18:18:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8373 states, 8372 states have (on average 3.407668418537984) internal successors, (28529), 8372 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8373 states to 8373 states and 28529 transitions. [2021-07-09 18:18:42,345 INFO L78 Accepts]: Start accepts. Automaton has 8373 states and 28529 transitions. Word has length 36 [2021-07-09 18:18:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:42,345 INFO L482 AbstractCegarLoop]: Abstraction has 8373 states and 28529 transitions. [2021-07-09 18:18:42,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8373 states and 28529 transitions. [2021-07-09 18:18:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:42,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:42,358 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:42,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable953 [2021-07-09 18:18:42,559 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash 154259041, now seen corresponding path program 137 times [2021-07-09 18:18:42,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:42,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820074807] [2021-07-09 18:18:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:42,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:42,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820074807] [2021-07-09 18:18:42,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820074807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:42,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884324694] [2021-07-09 18:18:42,804 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 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 [2021-07-09 18:18:42,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:42,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:18:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:43,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884324694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:43,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:43,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:18:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50765211] [2021-07-09 18:18:43,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:18:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:43,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:18:43,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:18:43,435 INFO L87 Difference]: Start difference. First operand 8373 states and 28529 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:48,079 INFO L93 Difference]: Finished difference Result 16894 states and 53816 transitions. [2021-07-09 18:18:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:18:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:48,112 INFO L225 Difference]: With dead ends: 16894 [2021-07-09 18:18:48,113 INFO L226 Difference]: Without dead ends: 16722 [2021-07-09 18:18:48,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3039 ImplicationChecksByTransitivity, 3488.5ms TimeCoverageRelationStatistics Valid=1612, Invalid=8090, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:18:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16722 states. [2021-07-09 18:18:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16722 to 8344. [2021-07-09 18:18:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8344 states, 8343 states have (on average 3.405369771065564) internal successors, (28411), 8343 states have internal predecessors, (28411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8344 states to 8344 states and 28411 transitions. [2021-07-09 18:18:48,355 INFO L78 Accepts]: Start accepts. Automaton has 8344 states and 28411 transitions. Word has length 36 [2021-07-09 18:18:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:48,355 INFO L482 AbstractCegarLoop]: Abstraction has 8344 states and 28411 transitions. [2021-07-09 18:18:48,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8344 states and 28411 transitions. [2021-07-09 18:18:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:48,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:48,368 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:48,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:48,568 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash -965334139, now seen corresponding path program 138 times [2021-07-09 18:18:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:48,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780975103] [2021-07-09 18:18:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:48,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780975103] [2021-07-09 18:18:48,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780975103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114074741] [2021-07-09 18:18:48,841 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 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 [2021-07-09 18:18:48,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:18:48,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:18:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:49,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114074741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:49,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:49,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-07-09 18:18:49,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976601113] [2021-07-09 18:18:49,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:18:49,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:18:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:18:49,448 INFO L87 Difference]: Start difference. First operand 8344 states and 28411 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:54,655 INFO L93 Difference]: Finished difference Result 14704 states and 47206 transitions. [2021-07-09 18:18:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 18:18:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:18:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:54,687 INFO L225 Difference]: With dead ends: 14704 [2021-07-09 18:18:54,687 INFO L226 Difference]: Without dead ends: 14425 [2021-07-09 18:18:54,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 3922.7ms TimeCoverageRelationStatistics Valid=1395, Invalid=10815, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 18:18:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14425 states. [2021-07-09 18:18:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14425 to 8328. [2021-07-09 18:18:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8328 states, 8327 states have (on average 3.4035066650654495) internal successors, (28341), 8327 states have internal predecessors, (28341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 28341 transitions. [2021-07-09 18:18:54,939 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 28341 transitions. Word has length 36 [2021-07-09 18:18:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:54,939 INFO L482 AbstractCegarLoop]: Abstraction has 8328 states and 28341 transitions. [2021-07-09 18:18:54,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 28341 transitions. [2021-07-09 18:18:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:18:54,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:54,951 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:55,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-07-09 18:18:55,152 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash 84053265, now seen corresponding path program 139 times [2021-07-09 18:18:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:55,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330709161] [2021-07-09 18:18:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:55,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:55,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330709161] [2021-07-09 18:18:55,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330709161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:55,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216336440] [2021-07-09 18:18:55,416 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 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 [2021-07-09 18:18:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:18:55,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:56,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216336440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:56,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:56,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:18:56,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073644004] [2021-07-09 18:18:56,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:18:56,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:18:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:18:56,047 INFO L87 Difference]: Start difference. First operand 8328 states and 28341 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:00,856 INFO L93 Difference]: Finished difference Result 16126 states and 51393 transitions. [2021-07-09 18:19:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:19:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:00,886 INFO L225 Difference]: With dead ends: 16126 [2021-07-09 18:19:00,886 INFO L226 Difference]: Without dead ends: 15980 [2021-07-09 18:19:00,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 3808.7ms TimeCoverageRelationStatistics Valid=1710, Invalid=9846, Unknown=0, NotChecked=0, Total=11556 [2021-07-09 18:19:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15980 states. [2021-07-09 18:19:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15980 to 8339. [2021-07-09 18:19:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8339 states, 8338 states have (on average 3.4045334612616935) internal successors, (28387), 8338 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8339 states to 8339 states and 28387 transitions. [2021-07-09 18:19:01,119 INFO L78 Accepts]: Start accepts. Automaton has 8339 states and 28387 transitions. Word has length 36 [2021-07-09 18:19:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:01,119 INFO L482 AbstractCegarLoop]: Abstraction has 8339 states and 28387 transitions. [2021-07-09 18:19:01,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 8339 states and 28387 transitions. [2021-07-09 18:19:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:01,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:01,132 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:01,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-09 18:19:01,332 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1005755405, now seen corresponding path program 140 times [2021-07-09 18:19:01,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:01,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12594487] [2021-07-09 18:19:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:01,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:01,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12594487] [2021-07-09 18:19:01,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12594487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:01,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90439223] [2021-07-09 18:19:01,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:19:01,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:19:01,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:02,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90439223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:02,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:02,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:19:02,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291018345] [2021-07-09 18:19:02,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:19:02,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:02,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:19:02,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:19:02,249 INFO L87 Difference]: Start difference. First operand 8339 states and 28387 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:07,568 INFO L93 Difference]: Finished difference Result 16497 states and 52600 transitions. [2021-07-09 18:19:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-09 18:19:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:07,602 INFO L225 Difference]: With dead ends: 16497 [2021-07-09 18:19:07,602 INFO L226 Difference]: Without dead ends: 16325 [2021-07-09 18:19:07,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4130 ImplicationChecksByTransitivity, 4121.2ms TimeCoverageRelationStatistics Valid=1917, Invalid=10293, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 18:19:07,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-07-09 18:19:07,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 8304. [2021-07-09 18:19:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8304 states, 8303 states have (on average 3.4017824882572563) internal successors, (28245), 8303 states have internal predecessors, (28245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8304 states to 8304 states and 28245 transitions. [2021-07-09 18:19:07,804 INFO L78 Accepts]: Start accepts. Automaton has 8304 states and 28245 transitions. Word has length 36 [2021-07-09 18:19:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:07,804 INFO L482 AbstractCegarLoop]: Abstraction has 8304 states and 28245 transitions. [2021-07-09 18:19:07,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8304 states and 28245 transitions. [2021-07-09 18:19:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:07,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:07,816 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:08,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-07-09 18:19:08,017 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1462820445, now seen corresponding path program 141 times [2021-07-09 18:19:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:08,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279908747] [2021-07-09 18:19:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:08,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:08,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279908747] [2021-07-09 18:19:08,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279908747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891563061] [2021-07-09 18:19:08,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:19:08,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:19:08,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:19:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891563061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:08,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:08,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:19:08,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45962594] [2021-07-09 18:19:08,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:19:08,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:19:08,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:19:08,899 INFO L87 Difference]: Start difference. First operand 8304 states and 28245 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:11,358 INFO L93 Difference]: Finished difference Result 9903 states and 32738 transitions. [2021-07-09 18:19:11,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:19:11,358 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:11,376 INFO L225 Difference]: With dead ends: 9903 [2021-07-09 18:19:11,377 INFO L226 Difference]: Without dead ends: 9618 [2021-07-09 18:19:11,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 2017.0ms TimeCoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:19:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9618 states. [2021-07-09 18:19:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9618 to 8500. [2021-07-09 18:19:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8500 states, 8499 states have (on average 3.3908695140604777) internal successors, (28819), 8499 states have internal predecessors, (28819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8500 states to 8500 states and 28819 transitions. [2021-07-09 18:19:11,520 INFO L78 Accepts]: Start accepts. Automaton has 8500 states and 28819 transitions. Word has length 36 [2021-07-09 18:19:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:11,520 INFO L482 AbstractCegarLoop]: Abstraction has 8500 states and 28819 transitions. [2021-07-09 18:19:11,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 8500 states and 28819 transitions. [2021-07-09 18:19:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:11,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:11,531 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:11,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:11,732 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1769049631, now seen corresponding path program 142 times [2021-07-09 18:19:11,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:11,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220555576] [2021-07-09 18:19:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:12,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:12,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220555576] [2021-07-09 18:19:12,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220555576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:12,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008454041] [2021-07-09 18:19:12,013 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 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 [2021-07-09 18:19:12,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:12,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:12,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:19:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:12,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008454041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:12,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:12,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:19:12,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695406914] [2021-07-09 18:19:12,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:19:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:19:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:19:12,619 INFO L87 Difference]: Start difference. First operand 8500 states and 28819 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:17,536 INFO L93 Difference]: Finished difference Result 15181 states and 48707 transitions. [2021-07-09 18:19:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-07-09 18:19:17,536 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:17,599 INFO L225 Difference]: With dead ends: 15181 [2021-07-09 18:19:17,599 INFO L226 Difference]: Without dead ends: 14873 [2021-07-09 18:19:17,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4683 ImplicationChecksByTransitivity, 3893.3ms TimeCoverageRelationStatistics Valid=2126, Invalid=11916, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:19:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14873 states. [2021-07-09 18:19:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14873 to 8525. [2021-07-09 18:19:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8525 states, 8524 states have (on average 3.392890661661192) internal successors, (28921), 8524 states have internal predecessors, (28921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8525 states to 8525 states and 28921 transitions. [2021-07-09 18:19:17,778 INFO L78 Accepts]: Start accepts. Automaton has 8525 states and 28921 transitions. Word has length 36 [2021-07-09 18:19:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:17,778 INFO L482 AbstractCegarLoop]: Abstraction has 8525 states and 28921 transitions. [2021-07-09 18:19:17,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8525 states and 28921 transitions. [2021-07-09 18:19:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:17,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:17,791 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:17,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:17,991 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1051481631, now seen corresponding path program 143 times [2021-07-09 18:19:17,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:17,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820056414] [2021-07-09 18:19:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:18,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:18,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820056414] [2021-07-09 18:19:18,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820056414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:18,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005946545] [2021-07-09 18:19:18,253 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 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 [2021-07-09 18:19:18,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:19:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:19:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:19,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005946545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:19,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:19,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:19:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045710617] [2021-07-09 18:19:19,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:19:19,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:19:19,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:19:19,307 INFO L87 Difference]: Start difference. First operand 8525 states and 28921 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,671 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-09 18:19:24,677 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-09 18:19:24,868 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-09 18:19:25,052 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-09 18:19:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:25,710 INFO L93 Difference]: Finished difference Result 15198 states and 48800 transitions. [2021-07-09 18:19:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:19:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:25,740 INFO L225 Difference]: With dead ends: 15198 [2021-07-09 18:19:25,740 INFO L226 Difference]: Without dead ends: 15026 [2021-07-09 18:19:25,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 5781.2ms TimeCoverageRelationStatistics Valid=2068, Invalid=11272, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:19:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15026 states. [2021-07-09 18:19:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15026 to 8508. [2021-07-09 18:19:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 8507 states have (on average 3.3914423416010346) internal successors, (28851), 8507 states have internal predecessors, (28851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 28851 transitions. [2021-07-09 18:19:25,953 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 28851 transitions. Word has length 36 [2021-07-09 18:19:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:25,953 INFO L482 AbstractCegarLoop]: Abstraction has 8508 states and 28851 transitions. [2021-07-09 18:19:25,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 28851 transitions. [2021-07-09 18:19:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:25,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:25,966 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:26,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-07-09 18:19:26,166 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:26,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1921485737, now seen corresponding path program 144 times [2021-07-09 18:19:26,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:26,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589346892] [2021-07-09 18:19:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:26,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:26,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589346892] [2021-07-09 18:19:26,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589346892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:26,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120831013] [2021-07-09 18:19:26,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:19:26,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:19:26,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:26,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120831013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:26,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:26,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:19:26,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316441132] [2021-07-09 18:19:26,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:19:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:26,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:19:26,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:19:26,961 INFO L87 Difference]: Start difference. First operand 8508 states and 28851 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:28,476 INFO L93 Difference]: Finished difference Result 10290 states and 34180 transitions. [2021-07-09 18:19:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:19:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:28,496 INFO L225 Difference]: With dead ends: 10290 [2021-07-09 18:19:28,496 INFO L226 Difference]: Without dead ends: 10019 [2021-07-09 18:19:28,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1358.1ms TimeCoverageRelationStatistics Valid=465, Invalid=2505, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:19:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10019 states. [2021-07-09 18:19:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10019 to 8581. [2021-07-09 18:19:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.3875291375291376) internal successors, (29065), 8580 states have internal predecessors, (29065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 29065 transitions. [2021-07-09 18:19:28,680 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 29065 transitions. Word has length 36 [2021-07-09 18:19:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:28,681 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 29065 transitions. [2021-07-09 18:19:28,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 29065 transitions. [2021-07-09 18:19:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:28,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:28,694 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:28,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-09 18:19:28,901 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash 400378273, now seen corresponding path program 145 times [2021-07-09 18:19:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:28,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57259325] [2021-07-09 18:19:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:29,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:29,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57259325] [2021-07-09 18:19:29,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57259325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:29,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513893348] [2021-07-09 18:19:29,219 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 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 [2021-07-09 18:19:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:19:29,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:29,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513893348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:29,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:29,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:19:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901692982] [2021-07-09 18:19:29,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:19:29,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:19:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:19:29,929 INFO L87 Difference]: Start difference. First operand 8581 states and 29065 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:31,219 INFO L93 Difference]: Finished difference Result 9224 states and 30724 transitions. [2021-07-09 18:19:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:19:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:31,238 INFO L225 Difference]: With dead ends: 9224 [2021-07-09 18:19:31,238 INFO L226 Difference]: Without dead ends: 9127 [2021-07-09 18:19:31,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1420.5ms TimeCoverageRelationStatistics Valid=489, Invalid=2481, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:19:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9127 states. [2021-07-09 18:19:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9127 to 8549. [2021-07-09 18:19:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8548 states have (on average 3.3908516612073) internal successors, (28985), 8548 states have internal predecessors, (28985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 28985 transitions. [2021-07-09 18:19:31,386 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 28985 transitions. Word has length 36 [2021-07-09 18:19:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:31,386 INFO L482 AbstractCegarLoop]: Abstraction has 8549 states and 28985 transitions. [2021-07-09 18:19:31,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 28985 transitions. [2021-07-09 18:19:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:31,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:31,399 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:31,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable999 [2021-07-09 18:19:31,599 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:31,600 INFO L82 PathProgramCache]: Analyzing trace with hash 272407709, now seen corresponding path program 146 times [2021-07-09 18:19:31,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:31,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348846516] [2021-07-09 18:19:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:31,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:31,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348846516] [2021-07-09 18:19:31,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348846516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:31,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674873709] [2021-07-09 18:19:31,913 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 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 [2021-07-09 18:19:31,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:31,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:31,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:19:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:32,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674873709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:32,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:32,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:19:32,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055509167] [2021-07-09 18:19:32,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:19:32,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:19:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:19:32,535 INFO L87 Difference]: Start difference. First operand 8549 states and 28985 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:34,427 INFO L93 Difference]: Finished difference Result 9493 states and 31558 transitions. [2021-07-09 18:19:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:19:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:34,445 INFO L225 Difference]: With dead ends: 9493 [2021-07-09 18:19:34,445 INFO L226 Difference]: Without dead ends: 9379 [2021-07-09 18:19:34,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:19:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2021-07-09 18:19:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 8675. [2021-07-09 18:19:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8675 states, 8674 states have (on average 3.3858658058565827) internal successors, (29369), 8674 states have internal predecessors, (29369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8675 states to 8675 states and 29369 transitions. [2021-07-09 18:19:34,591 INFO L78 Accepts]: Start accepts. Automaton has 8675 states and 29369 transitions. Word has length 36 [2021-07-09 18:19:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:34,591 INFO L482 AbstractCegarLoop]: Abstraction has 8675 states and 29369 transitions. [2021-07-09 18:19:34,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8675 states and 29369 transitions. [2021-07-09 18:19:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:34,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:34,604 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:34,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:34,804 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:34,805 INFO L82 PathProgramCache]: Analyzing trace with hash -565519459, now seen corresponding path program 147 times [2021-07-09 18:19:34,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:34,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322801065] [2021-07-09 18:19:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:35,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322801065] [2021-07-09 18:19:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322801065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230309416] [2021-07-09 18:19:35,073 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 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 [2021-07-09 18:19:35,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:19:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:35,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:19:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:35,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230309416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:35,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:35,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:19:35,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625249052] [2021-07-09 18:19:35,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:19:35,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:19:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:19:35,636 INFO L87 Difference]: Start difference. First operand 8675 states and 29369 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:38,352 INFO L93 Difference]: Finished difference Result 9936 states and 32860 transitions. [2021-07-09 18:19:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:19:38,353 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:38,371 INFO L225 Difference]: With dead ends: 9936 [2021-07-09 18:19:38,371 INFO L226 Difference]: Without dead ends: 9699 [2021-07-09 18:19:38,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2032.5ms TimeCoverageRelationStatistics Valid=723, Invalid=4533, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:19:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9699 states. [2021-07-09 18:19:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9699 to 8619. [2021-07-09 18:19:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8619 states, 8618 states have (on average 3.3923184033418425) internal successors, (29235), 8618 states have internal predecessors, (29235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8619 states to 8619 states and 29235 transitions. [2021-07-09 18:19:38,528 INFO L78 Accepts]: Start accepts. Automaton has 8619 states and 29235 transitions. Word has length 36 [2021-07-09 18:19:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:38,528 INFO L482 AbstractCegarLoop]: Abstraction has 8619 states and 29235 transitions. [2021-07-09 18:19:38,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8619 states and 29235 transitions. [2021-07-09 18:19:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:38,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:38,541 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:38,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1016 [2021-07-09 18:19:38,742 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash -739747679, now seen corresponding path program 148 times [2021-07-09 18:19:38,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:38,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110857453] [2021-07-09 18:19:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:39,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:39,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110857453] [2021-07-09 18:19:39,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110857453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:39,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168152739] [2021-07-09 18:19:39,014 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 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 [2021-07-09 18:19:39,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:39,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:39,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:19:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:39,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168152739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:39,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:39,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:19:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125294690] [2021-07-09 18:19:39,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:19:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:19:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:19:39,671 INFO L87 Difference]: Start difference. First operand 8619 states and 29235 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:42,194 INFO L93 Difference]: Finished difference Result 13113 states and 42481 transitions. [2021-07-09 18:19:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:19:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:42,222 INFO L225 Difference]: With dead ends: 13113 [2021-07-09 18:19:42,222 INFO L226 Difference]: Without dead ends: 12901 [2021-07-09 18:19:42,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 2195.6ms TimeCoverageRelationStatistics Valid=1017, Invalid=5303, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:19:42,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12901 states. [2021-07-09 18:19:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12901 to 8627. [2021-07-09 18:19:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8627 states, 8626 states have (on average 3.3928819846974263) internal successors, (29267), 8626 states have internal predecessors, (29267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8627 states to 8627 states and 29267 transitions. [2021-07-09 18:19:42,404 INFO L78 Accepts]: Start accepts. Automaton has 8627 states and 29267 transitions. Word has length 36 [2021-07-09 18:19:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:42,404 INFO L482 AbstractCegarLoop]: Abstraction has 8627 states and 29267 transitions. [2021-07-09 18:19:42,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8627 states and 29267 transitions. [2021-07-09 18:19:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:42,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:42,418 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:42,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1020,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:42,618 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -436172387, now seen corresponding path program 149 times [2021-07-09 18:19:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:42,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483480925] [2021-07-09 18:19:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:42,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:42,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483480925] [2021-07-09 18:19:42,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483480925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:42,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11707360] [2021-07-09 18:19:42,885 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 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 [2021-07-09 18:19:42,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:19:42,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:19:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:43,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11707360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:43,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:43,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:19:43,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206595408] [2021-07-09 18:19:43,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:19:43,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:19:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:19:43,528 INFO L87 Difference]: Start difference. First operand 8627 states and 29267 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:46,600 INFO L93 Difference]: Finished difference Result 14088 states and 45455 transitions. [2021-07-09 18:19:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:19:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:46,628 INFO L225 Difference]: With dead ends: 14088 [2021-07-09 18:19:46,628 INFO L226 Difference]: Without dead ends: 13888 [2021-07-09 18:19:46,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 2545.8ms TimeCoverageRelationStatistics Valid=1226, Invalid=6606, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:19:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13888 states. [2021-07-09 18:19:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13888 to 8631. [2021-07-09 18:19:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 3.3931633835457706) internal successors, (29283), 8630 states have internal predecessors, (29283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 29283 transitions. [2021-07-09 18:19:46,814 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 29283 transitions. Word has length 36 [2021-07-09 18:19:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:46,814 INFO L482 AbstractCegarLoop]: Abstraction has 8631 states and 29283 transitions. [2021-07-09 18:19:46,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 29283 transitions. [2021-07-09 18:19:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:46,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:46,826 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:47,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-07-09 18:19:47,026 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1747774113, now seen corresponding path program 150 times [2021-07-09 18:19:47,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:47,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825706353] [2021-07-09 18:19:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:47,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:47,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825706353] [2021-07-09 18:19:47,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825706353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:47,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939719260] [2021-07-09 18:19:47,293 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 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 [2021-07-09 18:19:47,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:19:47,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:47,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:19:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939719260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:47,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:47,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:19:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866713067] [2021-07-09 18:19:47,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:19:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:19:47,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:19:47,912 INFO L87 Difference]: Start difference. First operand 8631 states and 29283 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:52,402 INFO L93 Difference]: Finished difference Result 15312 states and 49011 transitions. [2021-07-09 18:19:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 18:19:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:52,431 INFO L225 Difference]: With dead ends: 15312 [2021-07-09 18:19:52,431 INFO L226 Difference]: Without dead ends: 15129 [2021-07-09 18:19:52,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3301 ImplicationChecksByTransitivity, 3484.1ms TimeCoverageRelationStatistics Valid=1641, Invalid=8661, Unknown=0, NotChecked=0, Total=10302 [2021-07-09 18:19:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15129 states. [2021-07-09 18:19:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15129 to 8642. [2021-07-09 18:19:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 8641 states have (on average 3.394167341742854) internal successors, (29329), 8641 states have internal predecessors, (29329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 29329 transitions. [2021-07-09 18:19:52,643 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 29329 transitions. Word has length 36 [2021-07-09 18:19:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:52,643 INFO L482 AbstractCegarLoop]: Abstraction has 8642 states and 29329 transitions. [2021-07-09 18:19:52,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 29329 transitions. [2021-07-09 18:19:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:52,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:52,656 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:52,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-07-09 18:19:52,857 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1634376375, now seen corresponding path program 151 times [2021-07-09 18:19:52,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:52,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143370283] [2021-07-09 18:19:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:53,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143370283] [2021-07-09 18:19:53,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143370283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937161023] [2021-07-09 18:19:53,177 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 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 [2021-07-09 18:19:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:19:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:53,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937161023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:53,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:53,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:19:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967851174] [2021-07-09 18:19:53,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:19:53,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:53,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:19:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:19:53,844 INFO L87 Difference]: Start difference. First operand 8642 states and 29329 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:55,063 INFO L93 Difference]: Finished difference Result 9351 states and 31188 transitions. [2021-07-09 18:19:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:19:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:55,083 INFO L225 Difference]: With dead ends: 9351 [2021-07-09 18:19:55,083 INFO L226 Difference]: Without dead ends: 9270 [2021-07-09 18:19:55,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1394.7ms TimeCoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:19:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-07-09 18:19:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 8684. [2021-07-09 18:19:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.3911090636876655) internal successors, (29445), 8683 states have internal predecessors, (29445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 29445 transitions. [2021-07-09 18:19:55,239 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 29445 transitions. Word has length 36 [2021-07-09 18:19:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:55,239 INFO L482 AbstractCegarLoop]: Abstraction has 8684 states and 29445 transitions. [2021-07-09 18:19:55,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 29445 transitions. [2021-07-09 18:19:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:55,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:55,254 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:55,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:55,454 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1822663753, now seen corresponding path program 152 times [2021-07-09 18:19:55,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:55,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951812424] [2021-07-09 18:19:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:55,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:55,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951812424] [2021-07-09 18:19:55,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951812424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:55,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373251456] [2021-07-09 18:19:55,684 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 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 [2021-07-09 18:19:55,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:19:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:56,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373251456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:56,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:56,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:19:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609184291] [2021-07-09 18:19:56,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:19:56,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:19:56,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:19:56,243 INFO L87 Difference]: Start difference. First operand 8684 states and 29445 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:58,568 INFO L93 Difference]: Finished difference Result 9925 states and 32866 transitions. [2021-07-09 18:19:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:19:58,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:19:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:58,587 INFO L225 Difference]: With dead ends: 9925 [2021-07-09 18:19:58,587 INFO L226 Difference]: Without dead ends: 9684 [2021-07-09 18:19:58,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 2001.1ms TimeCoverageRelationStatistics Valid=718, Invalid=4684, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:19:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9684 states. [2021-07-09 18:19:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9684 to 8666. [2021-07-09 18:19:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 8665 states have (on average 3.39399884593191) internal successors, (29409), 8665 states have internal predecessors, (29409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 29409 transitions. [2021-07-09 18:19:58,764 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 29409 transitions. Word has length 36 [2021-07-09 18:19:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:58,764 INFO L482 AbstractCegarLoop]: Abstraction has 8666 states and 29409 transitions. [2021-07-09 18:19:58,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 29409 transitions. [2021-07-09 18:19:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:19:58,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:58,778 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:58,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:58,978 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1812343479, now seen corresponding path program 153 times [2021-07-09 18:19:58,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:58,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163917432] [2021-07-09 18:19:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:59,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163917432] [2021-07-09 18:19:59,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163917432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624769155] [2021-07-09 18:19:59,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:19:59,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:19:59,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:59,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:19:59,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624769155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:59,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:19:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695338741] [2021-07-09 18:19:59,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:19:59,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:59,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:19:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:19:59,916 INFO L87 Difference]: Start difference. First operand 8666 states and 29409 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:01,790 INFO L93 Difference]: Finished difference Result 10554 states and 34993 transitions. [2021-07-09 18:20:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:20:01,790 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:01,811 INFO L225 Difference]: With dead ends: 10554 [2021-07-09 18:20:01,811 INFO L226 Difference]: Without dead ends: 10440 [2021-07-09 18:20:01,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=611, Invalid=3295, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:20:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2021-07-09 18:20:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 8680. [2021-07-09 18:20:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8680 states, 8679 states have (on average 3.396819910127895) internal successors, (29481), 8679 states have internal predecessors, (29481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 29481 transitions. [2021-07-09 18:20:01,964 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 29481 transitions. Word has length 36 [2021-07-09 18:20:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:01,964 INFO L482 AbstractCegarLoop]: Abstraction has 8680 states and 29481 transitions. [2021-07-09 18:20:01,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 29481 transitions. [2021-07-09 18:20:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:01,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:01,978 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:02,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1046 [2021-07-09 18:20:02,195 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1648435533, now seen corresponding path program 154 times [2021-07-09 18:20:02,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:02,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554811013] [2021-07-09 18:20:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:02,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554811013] [2021-07-09 18:20:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554811013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493540893] [2021-07-09 18:20:02,465 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 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 [2021-07-09 18:20:02,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:02,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:02,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:20:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493540893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:03,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:03,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:20:03,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116859112] [2021-07-09 18:20:03,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:20:03,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:20:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:20:03,167 INFO L87 Difference]: Start difference. First operand 8680 states and 29481 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:06,162 INFO L93 Difference]: Finished difference Result 13140 states and 42592 transitions. [2021-07-09 18:20:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:20:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:06,190 INFO L225 Difference]: With dead ends: 13140 [2021-07-09 18:20:06,190 INFO L226 Difference]: Without dead ends: 12928 [2021-07-09 18:20:06,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 2743.3ms TimeCoverageRelationStatistics Valid=1152, Invalid=6158, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:20:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12928 states. [2021-07-09 18:20:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12928 to 8684. [2021-07-09 18:20:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.397097777265922) internal successors, (29497), 8683 states have internal predecessors, (29497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 29497 transitions. [2021-07-09 18:20:06,370 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 29497 transitions. Word has length 36 [2021-07-09 18:20:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:06,371 INFO L482 AbstractCegarLoop]: Abstraction has 8684 states and 29497 transitions. [2021-07-09 18:20:06,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 29497 transitions. [2021-07-09 18:20:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:06,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:06,383 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:06,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:06,584 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1952010825, now seen corresponding path program 155 times [2021-07-09 18:20:06,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:06,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928725955] [2021-07-09 18:20:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:06,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:06,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928725955] [2021-07-09 18:20:06,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928725955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:06,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423750940] [2021-07-09 18:20:06,884 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 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 [2021-07-09 18:20:06,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:20:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:20:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:07,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423750940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:07,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:07,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:20:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250274859] [2021-07-09 18:20:07,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:20:07,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:20:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:20:07,583 INFO L87 Difference]: Start difference. First operand 8684 states and 29497 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:10,975 INFO L93 Difference]: Finished difference Result 14102 states and 45513 transitions. [2021-07-09 18:20:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:20:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:11,002 INFO L225 Difference]: With dead ends: 14102 [2021-07-09 18:20:11,002 INFO L226 Difference]: Without dead ends: 13902 [2021-07-09 18:20:11,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 3047.7ms TimeCoverageRelationStatistics Valid=1379, Invalid=7551, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 18:20:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13902 states. [2021-07-09 18:20:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13902 to 8686. [2021-07-09 18:20:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8686 states, 8685 states have (on average 3.397236614853195) internal successors, (29505), 8685 states have internal predecessors, (29505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8686 states to 8686 states and 29505 transitions. [2021-07-09 18:20:11,187 INFO L78 Accepts]: Start accepts. Automaton has 8686 states and 29505 transitions. Word has length 36 [2021-07-09 18:20:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:11,187 INFO L482 AbstractCegarLoop]: Abstraction has 8686 states and 29505 transitions. [2021-07-09 18:20:11,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8686 states and 29505 transitions. [2021-07-09 18:20:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:11,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:11,200 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:11,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-07-09 18:20:11,401 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -159009971, now seen corresponding path program 156 times [2021-07-09 18:20:11,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:11,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837353125] [2021-07-09 18:20:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:11,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837353125] [2021-07-09 18:20:11,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837353125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999479263] [2021-07-09 18:20:11,669 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 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 [2021-07-09 18:20:11,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:20:11,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:11,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:20:11,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999479263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:12,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:12,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:20:12,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025271210] [2021-07-09 18:20:12,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:20:12,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:20:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:20:12,302 INFO L87 Difference]: Start difference. First operand 8686 states and 29505 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:17,746 INFO L93 Difference]: Finished difference Result 15290 states and 48969 transitions. [2021-07-09 18:20:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:20:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:17,775 INFO L225 Difference]: With dead ends: 15290 [2021-07-09 18:20:17,775 INFO L226 Difference]: Without dead ends: 15107 [2021-07-09 18:20:17,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 4011.3ms TimeCoverageRelationStatistics Valid=1808, Invalid=9534, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:20:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15107 states. [2021-07-09 18:20:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15107 to 8680. [2021-07-09 18:20:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8680 states, 8679 states have (on average 3.396819910127895) internal successors, (29481), 8679 states have internal predecessors, (29481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 29481 transitions. [2021-07-09 18:20:17,984 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 29481 transitions. Word has length 36 [2021-07-09 18:20:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:17,984 INFO L482 AbstractCegarLoop]: Abstraction has 8680 states and 29481 transitions. [2021-07-09 18:20:17,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 29481 transitions. [2021-07-09 18:20:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:17,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:17,998 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:18,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:18,198 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1409144435, now seen corresponding path program 157 times [2021-07-09 18:20:18,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:18,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46568449] [2021-07-09 18:20:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:18,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:18,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46568449] [2021-07-09 18:20:18,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46568449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:18,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497793888] [2021-07-09 18:20:18,555 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 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 [2021-07-09 18:20:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:18,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:19,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497793888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:19,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:19,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:20:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375859027] [2021-07-09 18:20:19,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:20:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:20:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:20:19,285 INFO L87 Difference]: Start difference. First operand 8680 states and 29481 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:20,620 INFO L93 Difference]: Finished difference Result 9583 states and 31970 transitions. [2021-07-09 18:20:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:20:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:20,639 INFO L225 Difference]: With dead ends: 9583 [2021-07-09 18:20:20,640 INFO L226 Difference]: Without dead ends: 9502 [2021-07-09 18:20:20,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1554.0ms TimeCoverageRelationStatistics Valid=484, Invalid=2708, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:20:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9502 states. [2021-07-09 18:20:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9502 to 8856. [2021-07-09 18:20:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8856 states, 8855 states have (on average 3.3918690005646526) internal successors, (30035), 8855 states have internal predecessors, (30035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8856 states to 8856 states and 30035 transitions. [2021-07-09 18:20:20,792 INFO L78 Accepts]: Start accepts. Automaton has 8856 states and 30035 transitions. Word has length 36 [2021-07-09 18:20:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:20,792 INFO L482 AbstractCegarLoop]: Abstraction has 8856 states and 30035 transitions. [2021-07-09 18:20:20,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 8856 states and 30035 transitions. [2021-07-09 18:20:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:20,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:20,805 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:21,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:21,006 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2047895693, now seen corresponding path program 158 times [2021-07-09 18:20:21,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:21,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184620248] [2021-07-09 18:20:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:21,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:21,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184620248] [2021-07-09 18:20:21,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184620248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:21,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760509918] [2021-07-09 18:20:21,273 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 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 [2021-07-09 18:20:21,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:20:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:21,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760509918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:21,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:21,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:20:21,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494088260] [2021-07-09 18:20:21,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:20:21,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:20:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:20:21,870 INFO L87 Difference]: Start difference. First operand 8856 states and 30035 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:24,429 INFO L93 Difference]: Finished difference Result 9891 states and 32863 transitions. [2021-07-09 18:20:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:20:24,429 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:24,447 INFO L225 Difference]: With dead ends: 9891 [2021-07-09 18:20:24,447 INFO L226 Difference]: Without dead ends: 9654 [2021-07-09 18:20:24,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 2091.9ms TimeCoverageRelationStatistics Valid=749, Invalid=4801, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:20:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-07-09 18:20:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 8788. [2021-07-09 18:20:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 3.398770911573916) internal successors, (29865), 8787 states have internal predecessors, (29865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 29865 transitions. [2021-07-09 18:20:24,602 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 29865 transitions. Word has length 36 [2021-07-09 18:20:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:24,602 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 29865 transitions. [2021-07-09 18:20:24,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 29865 transitions. [2021-07-09 18:20:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:24,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:24,615 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:24,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:24,819 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:24,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:24,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1369833873, now seen corresponding path program 159 times [2021-07-09 18:20:24,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:24,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160114490] [2021-07-09 18:20:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:25,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:25,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160114490] [2021-07-09 18:20:25,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160114490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:25,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108850508] [2021-07-09 18:20:25,156 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 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 [2021-07-09 18:20:25,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:20:25,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:25,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:25,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108850508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:25,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:25,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:20:25,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19813566] [2021-07-09 18:20:25,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:20:25,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:25,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:20:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:20:25,808 INFO L87 Difference]: Start difference. First operand 8788 states and 29865 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:28,808 INFO L93 Difference]: Finished difference Result 12238 states and 40261 transitions. [2021-07-09 18:20:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:20:28,808 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:28,832 INFO L225 Difference]: With dead ends: 12238 [2021-07-09 18:20:28,832 INFO L226 Difference]: Without dead ends: 12124 [2021-07-09 18:20:28,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 2620.3ms TimeCoverageRelationStatistics Valid=1030, Invalid=5290, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:20:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12124 states. [2021-07-09 18:20:28,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12124 to 8752. [2021-07-09 18:20:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 8751 states have (on average 3.396297565992458) internal successors, (29721), 8751 states have internal predecessors, (29721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 29721 transitions. [2021-07-09 18:20:29,000 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 29721 transitions. Word has length 36 [2021-07-09 18:20:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:29,000 INFO L482 AbstractCegarLoop]: Abstraction has 8752 states and 29721 transitions. [2021-07-09 18:20:29,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 29721 transitions. [2021-07-09 18:20:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:29,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:29,012 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:29,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-07-09 18:20:29,214 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1027220015, now seen corresponding path program 160 times [2021-07-09 18:20:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:29,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213799729] [2021-07-09 18:20:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:29,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:29,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213799729] [2021-07-09 18:20:29,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213799729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:29,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877038363] [2021-07-09 18:20:29,588 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 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 [2021-07-09 18:20:29,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877038363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:30,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:30,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:20:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868571846] [2021-07-09 18:20:30,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:20:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:20:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:20:30,311 INFO L87 Difference]: Start difference. First operand 8752 states and 29721 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:33,262 INFO L93 Difference]: Finished difference Result 14609 states and 48154 transitions. [2021-07-09 18:20:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:20:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:33,292 INFO L225 Difference]: With dead ends: 14609 [2021-07-09 18:20:33,292 INFO L226 Difference]: Without dead ends: 14489 [2021-07-09 18:20:33,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2786.4ms TimeCoverageRelationStatistics Valid=1026, Invalid=5136, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:20:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14489 states. [2021-07-09 18:20:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14489 to 8780. [2021-07-09 18:20:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8780 states, 8779 states have (on average 3.397311766716027) internal successors, (29825), 8779 states have internal predecessors, (29825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8780 states to 8780 states and 29825 transitions. [2021-07-09 18:20:33,494 INFO L78 Accepts]: Start accepts. Automaton has 8780 states and 29825 transitions. Word has length 36 [2021-07-09 18:20:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:33,494 INFO L482 AbstractCegarLoop]: Abstraction has 8780 states and 29825 transitions. [2021-07-09 18:20:33,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8780 states and 29825 transitions. [2021-07-09 18:20:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:33,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:33,508 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:33,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:33,708 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1396473697, now seen corresponding path program 161 times [2021-07-09 18:20:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:33,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586582452] [2021-07-09 18:20:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:34,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:34,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586582452] [2021-07-09 18:20:34,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586582452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:34,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650922728] [2021-07-09 18:20:34,024 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 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 [2021-07-09 18:20:34,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:20:34,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:20:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:34,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650922728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:34,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:34,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:20:34,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003768231] [2021-07-09 18:20:34,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:20:34,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:34,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:20:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:20:34,668 INFO L87 Difference]: Start difference. First operand 8780 states and 29825 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:37,866 INFO L93 Difference]: Finished difference Result 12866 states and 42121 transitions. [2021-07-09 18:20:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:20:37,867 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:37,893 INFO L225 Difference]: With dead ends: 12866 [2021-07-09 18:20:37,893 INFO L226 Difference]: Without dead ends: 12777 [2021-07-09 18:20:37,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 2840.7ms TimeCoverageRelationStatistics Valid=1070, Invalid=5572, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:20:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12777 states. [2021-07-09 18:20:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12777 to 9042. [2021-07-09 18:20:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9042 states, 9041 states have (on average 3.3877889613980754) internal successors, (30629), 9041 states have internal predecessors, (30629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9042 states to 9042 states and 30629 transitions. [2021-07-09 18:20:38,078 INFO L78 Accepts]: Start accepts. Automaton has 9042 states and 30629 transitions. Word has length 36 [2021-07-09 18:20:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:38,079 INFO L482 AbstractCegarLoop]: Abstraction has 9042 states and 30629 transitions. [2021-07-09 18:20:38,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 9042 states and 30629 transitions. [2021-07-09 18:20:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:38,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:38,093 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:38,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:38,293 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1892255333, now seen corresponding path program 162 times [2021-07-09 18:20:38,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:38,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362096820] [2021-07-09 18:20:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:38,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:38,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362096820] [2021-07-09 18:20:38,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362096820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:38,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371486956] [2021-07-09 18:20:38,531 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 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 [2021-07-09 18:20:38,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:20:38,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:20:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:39,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371486956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:39,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:39,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:20:39,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083507720] [2021-07-09 18:20:39,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:20:39,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:39,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:20:39,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:20:39,151 INFO L87 Difference]: Start difference. First operand 9042 states and 30629 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:43,252 INFO L93 Difference]: Finished difference Result 13321 states and 43228 transitions. [2021-07-09 18:20:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:20:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:43,277 INFO L225 Difference]: With dead ends: 13321 [2021-07-09 18:20:43,277 INFO L226 Difference]: Without dead ends: 13070 [2021-07-09 18:20:43,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 3017.6ms TimeCoverageRelationStatistics Valid=993, Invalid=7197, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 18:20:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13070 states. [2021-07-09 18:20:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13070 to 9042. [2021-07-09 18:20:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9042 states, 9041 states have (on average 3.3877889613980754) internal successors, (30629), 9041 states have internal predecessors, (30629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9042 states to 9042 states and 30629 transitions. [2021-07-09 18:20:43,473 INFO L78 Accepts]: Start accepts. Automaton has 9042 states and 30629 transitions. Word has length 36 [2021-07-09 18:20:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:43,473 INFO L482 AbstractCegarLoop]: Abstraction has 9042 states and 30629 transitions. [2021-07-09 18:20:43,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9042 states and 30629 transitions. [2021-07-09 18:20:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:43,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:43,487 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:43,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1100 [2021-07-09 18:20:43,689 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1703787873, now seen corresponding path program 163 times [2021-07-09 18:20:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:43,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657559405] [2021-07-09 18:20:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:43,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657559405] [2021-07-09 18:20:43,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657559405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144524940] [2021-07-09 18:20:43,938 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 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 [2021-07-09 18:20:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:43,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:20:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144524940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:44,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:44,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:20:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529347383] [2021-07-09 18:20:44,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:20:44,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:20:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:20:44,540 INFO L87 Difference]: Start difference. First operand 9042 states and 30629 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:48,655 INFO L93 Difference]: Finished difference Result 15478 states and 49659 transitions. [2021-07-09 18:20:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:20:48,655 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:48,687 INFO L225 Difference]: With dead ends: 15478 [2021-07-09 18:20:48,687 INFO L226 Difference]: Without dead ends: 15306 [2021-07-09 18:20:48,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 3191.2ms TimeCoverageRelationStatistics Valid=1428, Invalid=7128, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:20:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15306 states. [2021-07-09 18:20:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15306 to 9042. [2021-07-09 18:20:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9042 states, 9041 states have (on average 3.3877889613980754) internal successors, (30629), 9041 states have internal predecessors, (30629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9042 states to 9042 states and 30629 transitions. [2021-07-09 18:20:48,889 INFO L78 Accepts]: Start accepts. Automaton has 9042 states and 30629 transitions. Word has length 36 [2021-07-09 18:20:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:48,889 INFO L482 AbstractCegarLoop]: Abstraction has 9042 states and 30629 transitions. [2021-07-09 18:20:48,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9042 states and 30629 transitions. [2021-07-09 18:20:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:48,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:48,903 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:49,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-07-09 18:20:49,104 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:49,104 INFO L82 PathProgramCache]: Analyzing trace with hash -510310387, now seen corresponding path program 164 times [2021-07-09 18:20:49,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:49,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852897403] [2021-07-09 18:20:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:49,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:49,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852897403] [2021-07-09 18:20:49,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852897403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:49,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385379013] [2021-07-09 18:20:49,436 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 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 [2021-07-09 18:20:49,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:49,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:49,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:20:49,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:50,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385379013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:50,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:50,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-09 18:20:50,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814857979] [2021-07-09 18:20:50,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:20:50,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:50,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:20:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:20:50,118 INFO L87 Difference]: Start difference. First operand 9042 states and 30629 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:53,109 INFO L93 Difference]: Finished difference Result 13247 states and 43430 transitions. [2021-07-09 18:20:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:20:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:53,134 INFO L225 Difference]: With dead ends: 13247 [2021-07-09 18:20:53,134 INFO L226 Difference]: Without dead ends: 13127 [2021-07-09 18:20:53,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2462.8ms TimeCoverageRelationStatistics Valid=1012, Invalid=4688, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:20:53,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-07-09 18:20:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 9102. [2021-07-09 18:20:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9102 states, 9101 states have (on average 3.3916053180969126) internal successors, (30867), 9101 states have internal predecessors, (30867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9102 states to 9102 states and 30867 transitions. [2021-07-09 18:20:53,300 INFO L78 Accepts]: Start accepts. Automaton has 9102 states and 30867 transitions. Word has length 36 [2021-07-09 18:20:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:53,300 INFO L482 AbstractCegarLoop]: Abstraction has 9102 states and 30867 transitions. [2021-07-09 18:20:53,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 9102 states and 30867 transitions. [2021-07-09 18:20:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:53,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:53,314 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:53,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-07-09 18:20:53,514 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash -14528751, now seen corresponding path program 165 times [2021-07-09 18:20:53,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:53,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783025747] [2021-07-09 18:20:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:53,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:53,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783025747] [2021-07-09 18:20:53,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783025747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:53,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642429293] [2021-07-09 18:20:53,764 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 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 [2021-07-09 18:20:53,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:20:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:20:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:54,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642429293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:54,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:54,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:20:54,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114689572] [2021-07-09 18:20:54,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:20:54,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:20:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:20:54,375 INFO L87 Difference]: Start difference. First operand 9102 states and 30867 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:58,535 INFO L93 Difference]: Finished difference Result 13635 states and 44262 transitions. [2021-07-09 18:20:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:20:58,536 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:20:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:58,561 INFO L225 Difference]: With dead ends: 13635 [2021-07-09 18:20:58,561 INFO L226 Difference]: Without dead ends: 13384 [2021-07-09 18:20:58,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 3084.1ms TimeCoverageRelationStatistics Valid=1148, Invalid=8358, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 18:20:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2021-07-09 18:20:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 9102. [2021-07-09 18:20:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9102 states, 9101 states have (on average 3.391385562026151) internal successors, (30865), 9101 states have internal predecessors, (30865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9102 states to 9102 states and 30865 transitions. [2021-07-09 18:20:58,768 INFO L78 Accepts]: Start accepts. Automaton has 9102 states and 30865 transitions. Word has length 36 [2021-07-09 18:20:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:58,769 INFO L482 AbstractCegarLoop]: Abstraction has 9102 states and 30865 transitions. [2021-07-09 18:20:58,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 9102 states and 30865 transitions. [2021-07-09 18:20:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:20:58,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:58,781 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:58,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1115 [2021-07-09 18:20:58,981 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:58,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:58,982 INFO L82 PathProgramCache]: Analyzing trace with hash 986322445, now seen corresponding path program 166 times [2021-07-09 18:20:58,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:58,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973575712] [2021-07-09 18:20:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:59,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:59,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973575712] [2021-07-09 18:20:59,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973575712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:59,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941629839] [2021-07-09 18:20:59,250 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 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 [2021-07-09 18:20:59,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:20:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:59,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941629839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:59,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:59,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-09 18:20:59,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517692989] [2021-07-09 18:20:59,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:20:59,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:59,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:20:59,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:20:59,881 INFO L87 Difference]: Start difference. First operand 9102 states and 30865 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:03,067 INFO L93 Difference]: Finished difference Result 14307 states and 46209 transitions. [2021-07-09 18:21:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:21:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:03,097 INFO L225 Difference]: With dead ends: 14307 [2021-07-09 18:21:03,097 INFO L226 Difference]: Without dead ends: 14107 [2021-07-09 18:21:03,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 2667.8ms TimeCoverageRelationStatistics Valid=1183, Invalid=7007, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 18:21:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14107 states. [2021-07-09 18:21:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14107 to 9104. [2021-07-09 18:21:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 9103 states have (on average 3.3915192793584534) internal successors, (30873), 9103 states have internal predecessors, (30873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 30873 transitions. [2021-07-09 18:21:03,311 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 30873 transitions. Word has length 36 [2021-07-09 18:21:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:03,311 INFO L482 AbstractCegarLoop]: Abstraction has 9104 states and 30873 transitions. [2021-07-09 18:21:03,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 30873 transitions. [2021-07-09 18:21:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:03,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:03,325 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:03,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:03,525 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1124698351, now seen corresponding path program 167 times [2021-07-09 18:21:03,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:03,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130419436] [2021-07-09 18:21:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:03,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:03,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130419436] [2021-07-09 18:21:03,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130419436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:03,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128453266] [2021-07-09 18:21:03,785 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 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 [2021-07-09 18:21:03,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:21:03,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:03,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:21:03,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:04,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128453266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:04,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:04,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 18:21:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438087215] [2021-07-09 18:21:04,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:21:04,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:21:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:21:04,657 INFO L87 Difference]: Start difference. First operand 9104 states and 30873 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:09,842 INFO L93 Difference]: Finished difference Result 16161 states and 51683 transitions. [2021-07-09 18:21:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:21:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:09,873 INFO L225 Difference]: With dead ends: 16161 [2021-07-09 18:21:09,873 INFO L226 Difference]: Without dead ends: 16036 [2021-07-09 18:21:09,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3873 ImplicationChecksByTransitivity, 4365.3ms TimeCoverageRelationStatistics Valid=1762, Invalid=10228, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:21:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16036 states. [2021-07-09 18:21:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16036 to 9440. [2021-07-09 18:21:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9440 states, 9439 states have (on average 3.3843627502913445) internal successors, (31945), 9439 states have internal predecessors, (31945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9440 states to 9440 states and 31945 transitions. [2021-07-09 18:21:10,124 INFO L78 Accepts]: Start accepts. Automaton has 9440 states and 31945 transitions. Word has length 36 [2021-07-09 18:21:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:10,124 INFO L482 AbstractCegarLoop]: Abstraction has 9440 states and 31945 transitions. [2021-07-09 18:21:10,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 9440 states and 31945 transitions. [2021-07-09 18:21:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:10,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:10,139 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:10,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-09 18:21:10,339 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash -202996211, now seen corresponding path program 168 times [2021-07-09 18:21:10,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:10,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928446914] [2021-07-09 18:21:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:21:10,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:10,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928446914] [2021-07-09 18:21:10,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928446914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:10,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695512939] [2021-07-09 18:21:10,603 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 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 [2021-07-09 18:21:10,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:21:10,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:21:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:11,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695512939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:11,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:11,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:21:11,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987953564] [2021-07-09 18:21:11,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:21:11,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:21:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:11,178 INFO L87 Difference]: Start difference. First operand 9440 states and 31945 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:15,468 INFO L93 Difference]: Finished difference Result 16189 states and 51937 transitions. [2021-07-09 18:21:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-09 18:21:15,468 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:15,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:15,500 INFO L225 Difference]: With dead ends: 16189 [2021-07-09 18:21:15,500 INFO L226 Difference]: Without dead ends: 16017 [2021-07-09 18:21:15,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 3338.8ms TimeCoverageRelationStatistics Valid=1724, Invalid=8376, Unknown=0, NotChecked=0, Total=10100 [2021-07-09 18:21:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16017 states. [2021-07-09 18:21:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16017 to 9417. [2021-07-09 18:21:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 3.3826465590484283) internal successors, (31851), 9416 states have internal predecessors, (31851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 31851 transitions. [2021-07-09 18:21:15,716 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 31851 transitions. Word has length 36 [2021-07-09 18:21:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:15,716 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 31851 transitions. [2021-07-09 18:21:15,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 31851 transitions. [2021-07-09 18:21:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:15,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:15,731 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:15,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:15,931 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1325847633, now seen corresponding path program 169 times [2021-07-09 18:21:15,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:15,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689922203] [2021-07-09 18:21:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:16,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689922203] [2021-07-09 18:21:16,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689922203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693370379] [2021-07-09 18:21:16,259 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 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 [2021-07-09 18:21:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:21:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:16,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693370379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:16,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:16,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:21:16,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792994207] [2021-07-09 18:21:16,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:21:16,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:16,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:21:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:21:16,961 INFO L87 Difference]: Start difference. First operand 9417 states and 31851 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:19,894 INFO L93 Difference]: Finished difference Result 13646 states and 44764 transitions. [2021-07-09 18:21:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:21:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:19,923 INFO L225 Difference]: With dead ends: 13646 [2021-07-09 18:21:19,923 INFO L226 Difference]: Without dead ends: 13526 [2021-07-09 18:21:19,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 2646.2ms TimeCoverageRelationStatistics Valid=1038, Invalid=5282, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:21:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13526 states. [2021-07-09 18:21:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13526 to 9427. [2021-07-09 18:21:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9427 states, 9426 states have (on average 3.3824527901548906) internal successors, (31883), 9426 states have internal predecessors, (31883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9427 states to 9427 states and 31883 transitions. [2021-07-09 18:21:20,121 INFO L78 Accepts]: Start accepts. Automaton has 9427 states and 31883 transitions. Word has length 36 [2021-07-09 18:21:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:20,121 INFO L482 AbstractCegarLoop]: Abstraction has 9427 states and 31883 transitions. [2021-07-09 18:21:20,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 9427 states and 31883 transitions. [2021-07-09 18:21:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:20,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:20,135 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:20,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-07-09 18:21:20,335 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1821629269, now seen corresponding path program 170 times [2021-07-09 18:21:20,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:20,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914194835] [2021-07-09 18:21:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:20,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:20,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914194835] [2021-07-09 18:21:20,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914194835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:20,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080355409] [2021-07-09 18:21:20,589 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 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 [2021-07-09 18:21:20,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:21:20,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:21:20,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:21,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080355409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:21,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:21,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:21:21,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394651059] [2021-07-09 18:21:21,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:21:21,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:21:21,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:21,189 INFO L87 Difference]: Start difference. First operand 9427 states and 31883 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:25,173 INFO L93 Difference]: Finished difference Result 13892 states and 45104 transitions. [2021-07-09 18:21:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:21:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:25,202 INFO L225 Difference]: With dead ends: 13892 [2021-07-09 18:21:25,202 INFO L226 Difference]: Without dead ends: 13641 [2021-07-09 18:21:25,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 3213.7ms TimeCoverageRelationStatistics Valid=1142, Invalid=8560, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:21:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13641 states. [2021-07-09 18:21:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13641 to 9387. [2021-07-09 18:21:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 9386 states have (on average 3.3789686767526104) internal successors, (31715), 9386 states have internal predecessors, (31715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 31715 transitions. [2021-07-09 18:21:25,414 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 31715 transitions. Word has length 36 [2021-07-09 18:21:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:25,415 INFO L482 AbstractCegarLoop]: Abstraction has 9387 states and 31715 transitions. [2021-07-09 18:21:25,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 31715 transitions. [2021-07-09 18:21:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:25,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:25,429 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:25,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:25,629 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2119463059, now seen corresponding path program 171 times [2021-07-09 18:21:25,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:25,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515897031] [2021-07-09 18:21:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:25,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:25,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515897031] [2021-07-09 18:21:25,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515897031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:25,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608759534] [2021-07-09 18:21:25,937 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 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 [2021-07-09 18:21:25,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:21:25,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:21:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:26,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608759534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:26,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:26,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:21:26,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174939377] [2021-07-09 18:21:26,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:21:26,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:26,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:21:26,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:21:26,540 INFO L87 Difference]: Start difference. First operand 9387 states and 31715 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:28,184 INFO L93 Difference]: Finished difference Result 11319 states and 37527 transitions. [2021-07-09 18:21:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:21:28,185 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:28,207 INFO L225 Difference]: With dead ends: 11319 [2021-07-09 18:21:28,207 INFO L226 Difference]: Without dead ends: 11205 [2021-07-09 18:21:28,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1475.0ms TimeCoverageRelationStatistics Valid=467, Invalid=2395, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:21:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-07-09 18:21:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 9417. [2021-07-09 18:21:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 3.3786108751062023) internal successors, (31813), 9416 states have internal predecessors, (31813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 31813 transitions. [2021-07-09 18:21:28,385 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 31813 transitions. Word has length 36 [2021-07-09 18:21:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:28,385 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 31813 transitions. [2021-07-09 18:21:28,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 31813 transitions. [2021-07-09 18:21:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:28,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:28,399 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:28,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1145 [2021-07-09 18:21:28,600 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1267870955, now seen corresponding path program 172 times [2021-07-09 18:21:28,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:28,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393498262] [2021-07-09 18:21:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:28,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393498262] [2021-07-09 18:21:28,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393498262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481995074] [2021-07-09 18:21:28,871 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 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 [2021-07-09 18:21:28,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:21:28,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:29,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481995074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:29,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:29,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:21:29,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812868120] [2021-07-09 18:21:29,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:21:29,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:29,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:21:29,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:21:29,554 INFO L87 Difference]: Start difference. First operand 9417 states and 31813 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:30,954 INFO L93 Difference]: Finished difference Result 11692 states and 39268 transitions. [2021-07-09 18:21:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:21:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:30,978 INFO L225 Difference]: With dead ends: 11692 [2021-07-09 18:21:30,978 INFO L226 Difference]: Without dead ends: 11572 [2021-07-09 18:21:30,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1466.9ms TimeCoverageRelationStatistics Valid=515, Invalid=2455, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:21:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-07-09 18:21:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 9417. [2021-07-09 18:21:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 3.3786108751062023) internal successors, (31813), 9416 states have internal predecessors, (31813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 31813 transitions. [2021-07-09 18:21:31,160 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 31813 transitions. Word has length 36 [2021-07-09 18:21:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:31,160 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 31813 transitions. [2021-07-09 18:21:31,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 31813 transitions. [2021-07-09 18:21:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:31,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:31,214 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:31,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1155,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:31,429 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1454175017, now seen corresponding path program 173 times [2021-07-09 18:21:31,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:31,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860047468] [2021-07-09 18:21:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:31,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:31,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860047468] [2021-07-09 18:21:31,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860047468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:31,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307708460] [2021-07-09 18:21:31,659 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 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 [2021-07-09 18:21:31,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:21:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:21:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:32,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307708460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:32,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:32,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:21:32,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285620053] [2021-07-09 18:21:32,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:21:32,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:21:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:32,229 INFO L87 Difference]: Start difference. First operand 9417 states and 31813 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:34,302 INFO L93 Difference]: Finished difference Result 11087 states and 36501 transitions. [2021-07-09 18:21:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:21:34,302 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:34,321 INFO L225 Difference]: With dead ends: 11087 [2021-07-09 18:21:34,321 INFO L226 Difference]: Without dead ends: 10827 [2021-07-09 18:21:34,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1717.1ms TimeCoverageRelationStatistics Valid=694, Invalid=3862, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:21:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10827 states. [2021-07-09 18:21:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10827 to 9469. [2021-07-09 18:21:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9469 states, 9468 states have (on average 3.37716518800169) internal successors, (31975), 9468 states have internal predecessors, (31975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9469 states to 9469 states and 31975 transitions. [2021-07-09 18:21:34,482 INFO L78 Accepts]: Start accepts. Automaton has 9469 states and 31975 transitions. Word has length 36 [2021-07-09 18:21:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:34,482 INFO L482 AbstractCegarLoop]: Abstraction has 9469 states and 31975 transitions. [2021-07-09 18:21:34,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9469 states and 31975 transitions. [2021-07-09 18:21:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:34,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:34,497 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:34,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-07-09 18:21:34,697 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1848298715, now seen corresponding path program 174 times [2021-07-09 18:21:34,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:34,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964727899] [2021-07-09 18:21:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:34,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964727899] [2021-07-09 18:21:34,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964727899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802018170] [2021-07-09 18:21:34,921 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 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 [2021-07-09 18:21:34,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:21:34,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:21:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:35,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802018170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:35,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:35,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:21:35,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938533302] [2021-07-09 18:21:35,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:21:35,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:35,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:21:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:21:35,455 INFO L87 Difference]: Start difference. First operand 9469 states and 31975 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:38,054 INFO L93 Difference]: Finished difference Result 12145 states and 39833 transitions. [2021-07-09 18:21:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:21:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:38,075 INFO L225 Difference]: With dead ends: 12145 [2021-07-09 18:21:38,075 INFO L226 Difference]: Without dead ends: 11871 [2021-07-09 18:21:38,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 2114.2ms TimeCoverageRelationStatistics Valid=871, Invalid=4829, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:21:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11871 states. [2021-07-09 18:21:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11871 to 9494. [2021-07-09 18:21:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9494 states, 9493 states have (on average 3.3784894132518697) internal successors, (32072), 9493 states have internal predecessors, (32072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9494 states to 9494 states and 32072 transitions. [2021-07-09 18:21:38,241 INFO L78 Accepts]: Start accepts. Automaton has 9494 states and 32072 transitions. Word has length 36 [2021-07-09 18:21:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:38,241 INFO L482 AbstractCegarLoop]: Abstraction has 9494 states and 32072 transitions. [2021-07-09 18:21:38,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9494 states and 32072 transitions. [2021-07-09 18:21:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:38,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:38,255 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:38,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1169,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:38,456 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash -504566575, now seen corresponding path program 175 times [2021-07-09 18:21:38,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:38,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854755268] [2021-07-09 18:21:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:38,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:38,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854755268] [2021-07-09 18:21:38,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854755268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:38,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285819821] [2021-07-09 18:21:38,677 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 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 [2021-07-09 18:21:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:38,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:21:38,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:39,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285819821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:39,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:39,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:21:39,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829012546] [2021-07-09 18:21:39,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:21:39,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:21:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:39,249 INFO L87 Difference]: Start difference. First operand 9494 states and 32072 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:41,103 INFO L93 Difference]: Finished difference Result 11806 states and 38817 transitions. [2021-07-09 18:21:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:21:41,103 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:41,127 INFO L225 Difference]: With dead ends: 11806 [2021-07-09 18:21:41,128 INFO L226 Difference]: Without dead ends: 11576 [2021-07-09 18:21:41,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1690.4ms TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:21:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11576 states. [2021-07-09 18:21:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11576 to 9523. [2021-07-09 18:21:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9523 states, 9522 states have (on average 3.3776517538332285) internal successors, (32162), 9522 states have internal predecessors, (32162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9523 states to 9523 states and 32162 transitions. [2021-07-09 18:21:41,315 INFO L78 Accepts]: Start accepts. Automaton has 9523 states and 32162 transitions. Word has length 36 [2021-07-09 18:21:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:41,315 INFO L482 AbstractCegarLoop]: Abstraction has 9523 states and 32162 transitions. [2021-07-09 18:21:41,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 9523 states and 32162 transitions. [2021-07-09 18:21:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:41,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:41,329 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:41,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:41,529 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash 213001425, now seen corresponding path program 176 times [2021-07-09 18:21:41,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:41,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122163679] [2021-07-09 18:21:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:41,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:41,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122163679] [2021-07-09 18:21:41,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122163679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:41,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504003803] [2021-07-09 18:21:41,761 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 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 [2021-07-09 18:21:41,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:21:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:21:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:42,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504003803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:42,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:42,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:21:42,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539134546] [2021-07-09 18:21:42,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:21:42,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:42,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:21:42,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:21:42,324 INFO L87 Difference]: Start difference. First operand 9523 states and 32162 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:44,633 INFO L93 Difference]: Finished difference Result 14710 states and 47784 transitions. [2021-07-09 18:21:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:21:44,633 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:44,662 INFO L225 Difference]: With dead ends: 14710 [2021-07-09 18:21:44,663 INFO L226 Difference]: Without dead ends: 14502 [2021-07-09 18:21:44,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2094.1ms TimeCoverageRelationStatistics Valid=1022, Invalid=4528, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:21:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14502 states. [2021-07-09 18:21:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14502 to 9512. [2021-07-09 18:21:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 9511 states have (on average 3.37682683208916) internal successors, (32117), 9511 states have internal predecessors, (32117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 32117 transitions. [2021-07-09 18:21:44,881 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 32117 transitions. Word has length 36 [2021-07-09 18:21:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:44,881 INFO L482 AbstractCegarLoop]: Abstraction has 9512 states and 32117 transitions. [2021-07-09 18:21:44,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 32117 transitions. [2021-07-09 18:21:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:44,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:44,895 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:45,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-07-09 18:21:45,096 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1182658195, now seen corresponding path program 177 times [2021-07-09 18:21:45,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:45,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312830020] [2021-07-09 18:21:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:45,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:45,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312830020] [2021-07-09 18:21:45,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312830020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:45,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920828603] [2021-07-09 18:21:45,346 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 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 [2021-07-09 18:21:45,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:21:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:21:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:45,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920828603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:45,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:45,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:21:45,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274357550] [2021-07-09 18:21:45,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:21:45,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:21:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:21:45,845 INFO L87 Difference]: Start difference. First operand 9512 states and 32117 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:47,542 INFO L93 Difference]: Finished difference Result 11067 states and 36686 transitions. [2021-07-09 18:21:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:21:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:47,565 INFO L225 Difference]: With dead ends: 11067 [2021-07-09 18:21:47,565 INFO L226 Difference]: Without dead ends: 10874 [2021-07-09 18:21:47,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1435.9ms TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:21:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10874 states. [2021-07-09 18:21:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10874 to 9516. [2021-07-09 18:21:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.3775091960063057) internal successors, (32137), 9515 states have internal predecessors, (32137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 32137 transitions. [2021-07-09 18:21:47,731 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 32137 transitions. Word has length 36 [2021-07-09 18:21:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 9516 states and 32137 transitions. [2021-07-09 18:21:47,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 32137 transitions. [2021-07-09 18:21:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:47,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:47,744 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:47,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:47,945 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1793353245, now seen corresponding path program 178 times [2021-07-09 18:21:47,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:47,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128186660] [2021-07-09 18:21:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:48,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:48,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128186660] [2021-07-09 18:21:48,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128186660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:48,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800189979] [2021-07-09 18:21:48,212 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 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 [2021-07-09 18:21:48,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:48,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:21:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:48,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800189979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:48,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:48,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:21:48,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396436445] [2021-07-09 18:21:48,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:21:48,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:21:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:48,823 INFO L87 Difference]: Start difference. First operand 9516 states and 32137 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:52,454 INFO L93 Difference]: Finished difference Result 14679 states and 47471 transitions. [2021-07-09 18:21:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:21:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:52,483 INFO L225 Difference]: With dead ends: 14679 [2021-07-09 18:21:52,484 INFO L226 Difference]: Without dead ends: 14469 [2021-07-09 18:21:52,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 2728.8ms TimeCoverageRelationStatistics Valid=1199, Invalid=7357, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:21:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14469 states. [2021-07-09 18:21:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14469 to 9598. [2021-07-09 18:21:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9598 states, 9597 states have (on average 3.3828279670730437) internal successors, (32465), 9597 states have internal predecessors, (32465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9598 states to 9598 states and 32465 transitions. [2021-07-09 18:21:52,713 INFO L78 Accepts]: Start accepts. Automaton has 9598 states and 32465 transitions. Word has length 36 [2021-07-09 18:21:52,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:52,713 INFO L482 AbstractCegarLoop]: Abstraction has 9598 states and 32465 transitions. [2021-07-09 18:21:52,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9598 states and 32465 transitions. [2021-07-09 18:21:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:52,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:52,728 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:52,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:52,929 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1784046051, now seen corresponding path program 179 times [2021-07-09 18:21:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:52,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261678372] [2021-07-09 18:21:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:53,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:53,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261678372] [2021-07-09 18:21:53,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261678372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:53,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91655140] [2021-07-09 18:21:53,174 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 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 [2021-07-09 18:21:53,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:21:53,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:53,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:21:53,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:53,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91655140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:53,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:53,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:21:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162531670] [2021-07-09 18:21:53,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:21:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:21:53,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:53,755 INFO L87 Difference]: Start difference. First operand 9598 states and 32465 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:57,947 INFO L93 Difference]: Finished difference Result 16861 states and 54131 transitions. [2021-07-09 18:21:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-09 18:21:57,948 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:21:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:57,977 INFO L225 Difference]: With dead ends: 16861 [2021-07-09 18:21:57,977 INFO L226 Difference]: Without dead ends: 16671 [2021-07-09 18:21:57,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 3198.1ms TimeCoverageRelationStatistics Valid=1501, Invalid=7811, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:21:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16671 states. [2021-07-09 18:21:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16671 to 9500. [2021-07-09 18:21:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9500 states, 9499 states have (on average 3.3764606800715864) internal successors, (32073), 9499 states have internal predecessors, (32073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9500 states to 9500 states and 32073 transitions. [2021-07-09 18:21:58,213 INFO L78 Accepts]: Start accepts. Automaton has 9500 states and 32073 transitions. Word has length 36 [2021-07-09 18:21:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:58,213 INFO L482 AbstractCegarLoop]: Abstraction has 9500 states and 32073 transitions. [2021-07-09 18:21:58,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 9500 states and 32073 transitions. [2021-07-09 18:21:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:21:58,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:58,228 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:58,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1190,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:58,428 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:58,428 INFO L82 PathProgramCache]: Analyzing trace with hash -665456031, now seen corresponding path program 180 times [2021-07-09 18:21:58,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:58,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437029830] [2021-07-09 18:21:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:58,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437029830] [2021-07-09 18:21:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437029830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421216810] [2021-07-09 18:21:58,679 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 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 [2021-07-09 18:21:58,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:21:58,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:21:58,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:59,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421216810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:59,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:59,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-09 18:21:59,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269652715] [2021-07-09 18:21:59,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:21:59,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:59,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:21:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:59,276 INFO L87 Difference]: Start difference. First operand 9500 states and 32073 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:03,714 INFO L93 Difference]: Finished difference Result 14506 states and 46865 transitions. [2021-07-09 18:22:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:22:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:03,742 INFO L225 Difference]: With dead ends: 14506 [2021-07-09 18:22:03,742 INFO L226 Difference]: Without dead ends: 14275 [2021-07-09 18:22:03,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 3391.9ms TimeCoverageRelationStatistics Valid=1351, Invalid=9361, Unknown=0, NotChecked=0, Total=10712 [2021-07-09 18:22:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2021-07-09 18:22:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 9510. [2021-07-09 18:22:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.3766957619097697) internal successors, (32109), 9509 states have internal predecessors, (32109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 32109 transitions. [2021-07-09 18:22:03,956 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 32109 transitions. Word has length 36 [2021-07-09 18:22:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:03,956 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 32109 transitions. [2021-07-09 18:22:03,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 32109 transitions. [2021-07-09 18:22:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:03,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:03,971 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:04,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:04,172 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1304074627, now seen corresponding path program 181 times [2021-07-09 18:22:04,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:04,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339776914] [2021-07-09 18:22:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:04,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:04,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339776914] [2021-07-09 18:22:04,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339776914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:04,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53455942] [2021-07-09 18:22:04,436 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 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 [2021-07-09 18:22:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:22:04,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53455942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:05,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:05,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:22:05,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794275848] [2021-07-09 18:22:05,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:22:05,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:22:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:22:05,087 INFO L87 Difference]: Start difference. First operand 9510 states and 32109 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:06,677 INFO L93 Difference]: Finished difference Result 12233 states and 40564 transitions. [2021-07-09 18:22:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:22:06,677 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:06,703 INFO L225 Difference]: With dead ends: 12233 [2021-07-09 18:22:06,703 INFO L226 Difference]: Without dead ends: 12138 [2021-07-09 18:22:06,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1567.0ms TimeCoverageRelationStatistics Valid=569, Invalid=2623, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:22:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12138 states. [2021-07-09 18:22:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12138 to 9534. [2021-07-09 18:22:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9534 states, 9533 states have (on average 3.376376796391482) internal successors, (32187), 9533 states have internal predecessors, (32187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9534 states to 9534 states and 32187 transitions. [2021-07-09 18:22:06,909 INFO L78 Accepts]: Start accepts. Automaton has 9534 states and 32187 transitions. Word has length 36 [2021-07-09 18:22:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:06,909 INFO L482 AbstractCegarLoop]: Abstraction has 9534 states and 32187 transitions. [2021-07-09 18:22:06,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 9534 states and 32187 transitions. [2021-07-09 18:22:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:06,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:06,925 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:07,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-07-09 18:22:07,133 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -382372487, now seen corresponding path program 182 times [2021-07-09 18:22:07,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:07,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491286372] [2021-07-09 18:22:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:07,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491286372] [2021-07-09 18:22:07,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491286372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344729995] [2021-07-09 18:22:07,410 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 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 [2021-07-09 18:22:07,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:07,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:22:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:08,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344729995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:08,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:08,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:22:08,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99614721] [2021-07-09 18:22:08,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:22:08,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:22:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:22:08,055 INFO L87 Difference]: Start difference. First operand 9534 states and 32187 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:09,453 INFO L93 Difference]: Finished difference Result 13101 states and 43152 transitions. [2021-07-09 18:22:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:22:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:09,483 INFO L225 Difference]: With dead ends: 13101 [2021-07-09 18:22:09,483 INFO L226 Difference]: Without dead ends: 12981 [2021-07-09 18:22:09,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1407.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2107, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:22:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12981 states. [2021-07-09 18:22:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12981 to 9518. [2021-07-09 18:22:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9518 states, 9517 states have (on average 3.375958810549543) internal successors, (32129), 9517 states have internal predecessors, (32129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9518 states to 9518 states and 32129 transitions. [2021-07-09 18:22:09,706 INFO L78 Accepts]: Start accepts. Automaton has 9518 states and 32129 transitions. Word has length 36 [2021-07-09 18:22:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:09,706 INFO L482 AbstractCegarLoop]: Abstraction has 9518 states and 32129 transitions. [2021-07-09 18:22:09,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9518 states and 32129 transitions. [2021-07-09 18:22:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:09,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:09,720 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:09,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:09,921 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:09,921 INFO L82 PathProgramCache]: Analyzing trace with hash -452482523, now seen corresponding path program 183 times [2021-07-09 18:22:09,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:09,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27513267] [2021-07-09 18:22:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:10,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:10,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27513267] [2021-07-09 18:22:10,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27513267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:10,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396801712] [2021-07-09 18:22:10,218 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 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 [2021-07-09 18:22:10,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:22:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:22:10,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:10,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396801712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:10,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:10,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:22:10,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804981306] [2021-07-09 18:22:10,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:22:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:22:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:22:10,803 INFO L87 Difference]: Start difference. First operand 9518 states and 32129 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:12,485 INFO L93 Difference]: Finished difference Result 13375 states and 44167 transitions. [2021-07-09 18:22:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:22:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:12,511 INFO L225 Difference]: With dead ends: 13375 [2021-07-09 18:22:12,511 INFO L226 Difference]: Without dead ends: 13255 [2021-07-09 18:22:12,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1526.9ms TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:22:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13255 states. [2021-07-09 18:22:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13255 to 9518. [2021-07-09 18:22:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9518 states, 9517 states have (on average 3.375958810549543) internal successors, (32129), 9517 states have internal predecessors, (32129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9518 states to 9518 states and 32129 transitions. [2021-07-09 18:22:12,689 INFO L78 Accepts]: Start accepts. Automaton has 9518 states and 32129 transitions. Word has length 36 [2021-07-09 18:22:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:12,689 INFO L482 AbstractCegarLoop]: Abstraction has 9518 states and 32129 transitions. [2021-07-09 18:22:12,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 9518 states and 32129 transitions. [2021-07-09 18:22:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:12,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:12,703 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:12,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-07-09 18:22:12,904 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:12,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2025403847, now seen corresponding path program 184 times [2021-07-09 18:22:12,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:12,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374885569] [2021-07-09 18:22:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:13,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:13,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374885569] [2021-07-09 18:22:13,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374885569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:13,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879837045] [2021-07-09 18:22:13,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:22:13,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:13,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:13,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879837045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:13,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:13,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:22:13,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217558092] [2021-07-09 18:22:13,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:22:13,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:22:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:22:13,767 INFO L87 Difference]: Start difference. First operand 9518 states and 32129 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:15,990 INFO L93 Difference]: Finished difference Result 11342 states and 37248 transitions. [2021-07-09 18:22:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:22:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:16,015 INFO L225 Difference]: With dead ends: 11342 [2021-07-09 18:22:16,015 INFO L226 Difference]: Without dead ends: 11106 [2021-07-09 18:22:16,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1923.9ms TimeCoverageRelationStatistics Valid=767, Invalid=4489, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:22:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-07-09 18:22:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 9554. [2021-07-09 18:22:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9554 states, 9553 states have (on average 3.376007536899403) internal successors, (32251), 9553 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) [2021-07-09 18:22:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9554 states to 9554 states and 32251 transitions. [2021-07-09 18:22:16,192 INFO L78 Accepts]: Start accepts. Automaton has 9554 states and 32251 transitions. Word has length 36 [2021-07-09 18:22:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:16,193 INFO L482 AbstractCegarLoop]: Abstraction has 9554 states and 32251 transitions. [2021-07-09 18:22:16,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 9554 states and 32251 transitions. [2021-07-09 18:22:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:16,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:16,207 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:16,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:16,408 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:16,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1032910283, now seen corresponding path program 185 times [2021-07-09 18:22:16,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:16,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974728897] [2021-07-09 18:22:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:16,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:16,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974728897] [2021-07-09 18:22:16,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974728897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:16,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577485943] [2021-07-09 18:22:16,637 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 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 [2021-07-09 18:22:16,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:16,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:16,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:17,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577485943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:17,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:17,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:22:17,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120835215] [2021-07-09 18:22:17,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:22:17,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:22:17,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:22:17,197 INFO L87 Difference]: Start difference. First operand 9554 states and 32251 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:19,987 INFO L93 Difference]: Finished difference Result 12256 states and 40152 transitions. [2021-07-09 18:22:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:22:19,987 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:20,013 INFO L225 Difference]: With dead ends: 12256 [2021-07-09 18:22:20,013 INFO L226 Difference]: Without dead ends: 12034 [2021-07-09 18:22:20,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2110.9ms TimeCoverageRelationStatistics Valid=927, Invalid=5235, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:22:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12034 states. [2021-07-09 18:22:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12034 to 9564. [2021-07-09 18:22:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9563 states have (on average 3.3767646136149745) internal successors, (32292), 9563 states have internal predecessors, (32292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 32292 transitions. [2021-07-09 18:22:20,240 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 32292 transitions. Word has length 36 [2021-07-09 18:22:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:20,240 INFO L482 AbstractCegarLoop]: Abstraction has 9564 states and 32292 transitions. [2021-07-09 18:22:20,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 32292 transitions. [2021-07-09 18:22:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:20,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:20,254 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:20,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-07-09 18:22:20,454 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:20,455 INFO L82 PathProgramCache]: Analyzing trace with hash -315342283, now seen corresponding path program 186 times [2021-07-09 18:22:20,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:20,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356590954] [2021-07-09 18:22:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:20,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:20,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356590954] [2021-07-09 18:22:20,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356590954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:20,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283510540] [2021-07-09 18:22:20,694 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 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 [2021-07-09 18:22:20,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:22:20,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:20,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:21,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283510540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:21,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:21,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:22:21,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38696131] [2021-07-09 18:22:21,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:22:21,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:21,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:22:21,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:22:21,220 INFO L87 Difference]: Start difference. First operand 9564 states and 32292 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:23,911 INFO L93 Difference]: Finished difference Result 14881 states and 48362 transitions. [2021-07-09 18:22:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:22:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:23,943 INFO L225 Difference]: With dead ends: 14881 [2021-07-09 18:22:23,943 INFO L226 Difference]: Without dead ends: 14679 [2021-07-09 18:22:23,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 2181.0ms TimeCoverageRelationStatistics Valid=1102, Invalid=5060, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:22:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14679 states. [2021-07-09 18:22:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14679 to 9539. [2021-07-09 18:22:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9539 states, 9538 states have (on average 3.3750262109456908) internal successors, (32191), 9538 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9539 states to 9539 states and 32191 transitions. [2021-07-09 18:22:24,246 INFO L78 Accepts]: Start accepts. Automaton has 9539 states and 32191 transitions. Word has length 36 [2021-07-09 18:22:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:24,246 INFO L482 AbstractCegarLoop]: Abstraction has 9539 states and 32191 transitions. [2021-07-09 18:22:24,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 9539 states and 32191 transitions. [2021-07-09 18:22:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:24,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:24,261 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:24,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:24,462 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash 310821857, now seen corresponding path program 187 times [2021-07-09 18:22:24,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:24,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849244211] [2021-07-09 18:22:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:24,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849244211] [2021-07-09 18:22:24,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849244211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472546811] [2021-07-09 18:22:24,686 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 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 [2021-07-09 18:22:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:24,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:25,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472546811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:25,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:25,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:22:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43832324] [2021-07-09 18:22:25,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:22:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:22:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:22:25,288 INFO L87 Difference]: Start difference. First operand 9539 states and 32191 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,537 INFO L93 Difference]: Finished difference Result 11876 states and 38971 transitions. [2021-07-09 18:22:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:22:27,538 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,564 INFO L225 Difference]: With dead ends: 11876 [2021-07-09 18:22:27,564 INFO L226 Difference]: Without dead ends: 11670 [2021-07-09 18:22:27,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1864.8ms TimeCoverageRelationStatistics Valid=837, Invalid=4565, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:22:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11670 states. [2021-07-09 18:22:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11670 to 9571. [2021-07-09 18:22:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9571 states, 9570 states have (on average 3.375130616509927) internal successors, (32300), 9570 states have internal predecessors, (32300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9571 states to 9571 states and 32300 transitions. [2021-07-09 18:22:27,768 INFO L78 Accepts]: Start accepts. Automaton has 9571 states and 32300 transitions. Word has length 36 [2021-07-09 18:22:27,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,768 INFO L482 AbstractCegarLoop]: Abstraction has 9571 states and 32300 transitions. [2021-07-09 18:22:27,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 9571 states and 32300 transitions. [2021-07-09 18:22:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:27,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,783 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-07-09 18:22:27,983 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1028389857, now seen corresponding path program 188 times [2021-07-09 18:22:27,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38747087] [2021-07-09 18:22:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:28,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:28,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38747087] [2021-07-09 18:22:28,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38747087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403049018] [2021-07-09 18:22:28,217 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 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 [2021-07-09 18:22:28,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:28,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:28,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403049018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:28,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-09 18:22:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112421558] [2021-07-09 18:22:28,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:22:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:22:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:22:28,780 INFO L87 Difference]: Start difference. First operand 9571 states and 32300 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:31,407 INFO L93 Difference]: Finished difference Result 14829 states and 48098 transitions. [2021-07-09 18:22:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:22:31,408 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:31,439 INFO L225 Difference]: With dead ends: 14829 [2021-07-09 18:22:31,440 INFO L226 Difference]: Without dead ends: 14621 [2021-07-09 18:22:31,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2240.0ms TimeCoverageRelationStatistics Valid=1091, Invalid=5071, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:22:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14621 states. [2021-07-09 18:22:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14621 to 9541. [2021-07-09 18:22:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.3749475890985323) internal successors, (32197), 9540 states have internal predecessors, (32197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 32197 transitions. [2021-07-09 18:22:31,681 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 32197 transitions. Word has length 36 [2021-07-09 18:22:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:31,681 INFO L482 AbstractCegarLoop]: Abstraction has 9541 states and 32197 transitions. [2021-07-09 18:22:31,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 32197 transitions. [2021-07-09 18:22:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:31,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:31,695 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:31,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-07-09 18:22:31,897 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash -367269763, now seen corresponding path program 189 times [2021-07-09 18:22:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:31,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589289748] [2021-07-09 18:22:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:32,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:32,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589289748] [2021-07-09 18:22:32,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589289748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237781534] [2021-07-09 18:22:32,150 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 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 [2021-07-09 18:22:32,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:22:32,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:32,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:22:32,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:32,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237781534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:32,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:22:32,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675612518] [2021-07-09 18:22:32,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:22:32,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:22:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:22:32,663 INFO L87 Difference]: Start difference. First operand 9541 states and 32197 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:34,756 INFO L93 Difference]: Finished difference Result 11240 states and 37223 transitions. [2021-07-09 18:22:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:22:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:34,779 INFO L225 Difference]: With dead ends: 11240 [2021-07-09 18:22:34,779 INFO L226 Difference]: Without dead ends: 11047 [2021-07-09 18:22:34,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1626.7ms TimeCoverageRelationStatistics Valid=592, Invalid=3314, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:22:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11047 states. [2021-07-09 18:22:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11047 to 9525. [2021-07-09 18:22:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9525 states, 9524 states have (on average 3.375367492650147) internal successors, (32147), 9524 states have internal predecessors, (32147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9525 states to 9525 states and 32147 transitions. [2021-07-09 18:22:35,029 INFO L78 Accepts]: Start accepts. Automaton has 9525 states and 32147 transitions. Word has length 36 [2021-07-09 18:22:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:35,029 INFO L482 AbstractCegarLoop]: Abstraction has 9525 states and 32147 transitions. [2021-07-09 18:22:35,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 9525 states and 32147 transitions. [2021-07-09 18:22:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:35,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:35,045 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:35,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:35,249 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1966588127, now seen corresponding path program 190 times [2021-07-09 18:22:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:35,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330904032] [2021-07-09 18:22:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:35,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330904032] [2021-07-09 18:22:35,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330904032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232163992] [2021-07-09 18:22:35,491 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 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 [2021-07-09 18:22:35,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:35,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:35,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:35,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:36,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232163992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:36,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:36,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:22:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058386505] [2021-07-09 18:22:36,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:22:36,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:22:36,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:22:36,075 INFO L87 Difference]: Start difference. First operand 9525 states and 32147 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:40,023 INFO L93 Difference]: Finished difference Result 15749 states and 50484 transitions. [2021-07-09 18:22:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:22:40,024 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:40,052 INFO L225 Difference]: With dead ends: 15749 [2021-07-09 18:22:40,052 INFO L226 Difference]: Without dead ends: 15603 [2021-07-09 18:22:40,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 3018.2ms TimeCoverageRelationStatistics Valid=1492, Invalid=8210, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:22:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15603 states. [2021-07-09 18:22:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15603 to 9516. [2021-07-09 18:22:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.3749868628481345) internal successors, (32113), 9515 states have internal predecessors, (32113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 32113 transitions. [2021-07-09 18:22:40,293 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 32113 transitions. Word has length 36 [2021-07-09 18:22:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:40,294 INFO L482 AbstractCegarLoop]: Abstraction has 9516 states and 32113 transitions. [2021-07-09 18:22:40,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 32113 transitions. [2021-07-09 18:22:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:40,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:40,310 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:40,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-07-09 18:22:40,510 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:40,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1044885987, now seen corresponding path program 191 times [2021-07-09 18:22:40,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:40,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767015855] [2021-07-09 18:22:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:40,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:40,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767015855] [2021-07-09 18:22:40,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767015855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:40,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541526505] [2021-07-09 18:22:40,754 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 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 [2021-07-09 18:22:40,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:40,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:40,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:40,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:41,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541526505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:41,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:41,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-09 18:22:41,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611453595] [2021-07-09 18:22:41,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:22:41,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:41,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:22:41,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:22:41,349 INFO L87 Difference]: Start difference. First operand 9516 states and 32113 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:45,625 INFO L93 Difference]: Finished difference Result 16580 states and 53178 transitions. [2021-07-09 18:22:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:22:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:45,659 INFO L225 Difference]: With dead ends: 16580 [2021-07-09 18:22:45,659 INFO L226 Difference]: Without dead ends: 16408 [2021-07-09 18:22:45,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 3379.5ms TimeCoverageRelationStatistics Valid=1638, Invalid=8868, Unknown=0, NotChecked=0, Total=10506 [2021-07-09 18:22:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16408 states. [2021-07-09 18:22:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16408 to 9433. [2021-07-09 18:22:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9433 states, 9432 states have (on average 3.3692748091603053) internal successors, (31779), 9432 states have internal predecessors, (31779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9433 states to 9433 states and 31779 transitions. [2021-07-09 18:22:45,968 INFO L78 Accepts]: Start accepts. Automaton has 9433 states and 31779 transitions. Word has length 36 [2021-07-09 18:22:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:45,968 INFO L482 AbstractCegarLoop]: Abstraction has 9433 states and 31779 transitions. [2021-07-09 18:22:45,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 9433 states and 31779 transitions. [2021-07-09 18:22:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:45,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:45,982 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:46,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1248,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:46,183 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1893894713, now seen corresponding path program 192 times [2021-07-09 18:22:46,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:46,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385765499] [2021-07-09 18:22:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:46,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:46,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385765499] [2021-07-09 18:22:46,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385765499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:46,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453360462] [2021-07-09 18:22:46,510 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 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 [2021-07-09 18:22:46,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:22:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:22:46,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:47,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453360462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:47,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:47,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 18:22:47,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313070901] [2021-07-09 18:22:47,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:22:47,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:22:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:22:47,123 INFO L87 Difference]: Start difference. First operand 9433 states and 31779 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:49,397 INFO L93 Difference]: Finished difference Result 11721 states and 38668 transitions. [2021-07-09 18:22:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:22:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:22:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:49,421 INFO L225 Difference]: With dead ends: 11721 [2021-07-09 18:22:49,421 INFO L226 Difference]: Without dead ends: 11607 [2021-07-09 18:22:49,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1780.1ms TimeCoverageRelationStatistics Valid=563, Invalid=3219, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:22:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11607 states. [2021-07-09 18:22:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11607 to 9459. [2021-07-09 18:22:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9458 states have (on average 3.3691055191372383) internal successors, (31865), 9458 states have internal predecessors, (31865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 31865 transitions. [2021-07-09 18:22:49,599 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 31865 transitions. Word has length 36 [2021-07-09 18:22:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:49,600 INFO L482 AbstractCegarLoop]: Abstraction has 9459 states and 31865 transitions. [2021-07-09 18:22:49,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 31865 transitions. [2021-07-09 18:22:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:22:49,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:49,614 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:49,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:49,815 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:49,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1549480479, now seen corresponding path program 193 times [2021-07-09 18:22:49,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:49,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281297194] [2021-07-09 18:22:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:50,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:50,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281297194] [2021-07-09 18:22:50,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281297194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:50,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035835763] [2021-07-09 18:22:50,138 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 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 [2021-07-09 18:22:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:22:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035835763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:50,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:50,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:22:50,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594507360] [2021-07-09 18:22:50,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:22:50,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:50,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:22:50,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:22:50,875 INFO L87 Difference]: Start difference. First operand 9459 states and 31865 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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... [2021-07-09 18:22:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:22:53,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:53,030 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:22:53,032 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:22:53,033 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:22:53,034 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:22:53 BasicIcfg [2021-07-09 18:22:53,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:22:53,034 INFO L168 Benchmark]: Toolchain (without parser) took 781882.15 ms. Allocated memory was 202.4 MB in the beginning and 1.1 GB in the end (delta: 850.4 MB). Free memory was 182.9 MB in the beginning and 829.1 MB in the end (delta: -646.1 MB). Peak memory consumption was 204.9 MB. Max. memory is 8.0 GB. [2021-07-09 18:22:53,034 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 184.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:22:53,034 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.90 ms. Allocated memory is still 202.4 MB. Free memory was 182.9 MB in the beginning and 181.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:22:53,034 INFO L168 Benchmark]: Boogie Preprocessor took 11.23 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 180.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:22:53,034 INFO L168 Benchmark]: RCFGBuilder took 360.58 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 166.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:22:53,034 INFO L168 Benchmark]: TraceAbstraction took 781489.00 ms. Allocated memory was 202.4 MB in the beginning and 1.1 GB in the end (delta: 850.4 MB). Free memory was 165.5 MB in the beginning and 829.1 MB in the end (delta: -663.6 MB). Peak memory consumption was 188.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:22:53,034 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 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 184.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.90 ms. Allocated memory is still 202.4 MB. Free memory was 182.9 MB in the beginning and 181.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.23 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 180.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.58 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 166.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 781489.00 ms. Allocated memory was 202.4 MB in the beginning and 1.1 GB in the end (delta: 850.4 MB). Free memory was 165.5 MB in the beginning and 829.1 MB in the end (delta: -663.6 MB). Peak memory consumption was 188.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (9459states) and FLOYD_HOARE automaton (currently 49 states, 35 states before enhancement),while ReachableStatesComputation was computing reachable states (5524 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 781403.7ms, OverallIterations: 196, TraceHistogramMax: 4, EmptinessCheckTime: 2037.5ms, AutomataDifference: 543688.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7058 SDtfs, 70479 SDslu, 101667 SDs, 0 SdLazy, 415277 SolverSat, 35017 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 162485.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18094 GetRequests, 3583 SyntacticMatches, 370 SemanticMatches, 14141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352660 ImplicationChecksByTransitivity, 461583.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9598occurred in iteration=181, InterpolantAutomatonStates: 12637, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27667.0ms AutomataMinimizationTime, 195 MinimizatonAttempts, 700120 StatesRemovedByMinimization, 193 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 628.3ms SsaConstructionTime, 1816.4ms SatisfiabilityAnalysisTime, 162845.4ms InterpolantComputationTime, 13706 NumberOfCodeBlocks, 13690 NumberOfCodeBlocksAsserted, 812 NumberOfCheckSat, 13318 ConstructedInterpolants, 0 QuantifiedInterpolants, 316957 SizeOfPredicates, 1310 NumberOfNonLiveVariables, 12336 ConjunctsInSsa, 4160 ConjunctsInUnsatCore, 388 InterpolantComputations, 4 PerfectInterpolantSequences, 113/7362 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