/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:38:40,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:38:40,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:38:40,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:38:40,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:38:40,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:38:40,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:38:40,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:38:40,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:38:40,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:38:40,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:38:40,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:38:40,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:38:40,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:38:40,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:38:40,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:38:40,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:38:40,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:38:40,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:38:40,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:38:40,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:38:40,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:38:40,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:38:40,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:38:40,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:38:40,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:38:40,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:38:40,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:38:40,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:38:40,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:38:40,767 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:38:40,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:38:40,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:38:40,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:38:40,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:38:40,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:38:40,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:38:40,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:38:40,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:38:40,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:38:40,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:38:40,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:38:40,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:38:40,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:38:40,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:38:40,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:38:40,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:38:40,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:38:40,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:38:40,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:38:40,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:38:40,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:38:40,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:38:40,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:38:40,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:38:40,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:38:41,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:38:41,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:38:41,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:38:41,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:38:41,081 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:38:41,082 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 16:38:41,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68de16ad2/0a9265530b8a48ea87f6b37cba6d390a/FLAGe4c1f46e5 [2020-08-22 16:38:41,587 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:38:41,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 16:38:41,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68de16ad2/0a9265530b8a48ea87f6b37cba6d390a/FLAGe4c1f46e5 [2020-08-22 16:38:41,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68de16ad2/0a9265530b8a48ea87f6b37cba6d390a [2020-08-22 16:38:41,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:38:41,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:38:41,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:41,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:38:41,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:38:41,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:41" (1/1) ... [2020-08-22 16:38:41,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18725080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41, skipping insertion in model container [2020-08-22 16:38:41,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:41" (1/1) ... [2020-08-22 16:38:41,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:38:42,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:38:42,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:42,251 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:38:42,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:42,384 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:38:42,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42 WrapperNode [2020-08-22 16:38:42,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:42,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:38:42,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:38:42,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:38:42,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (1/1) ... [2020-08-22 16:38:42,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (1/1) ... [2020-08-22 16:38:42,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (1/1) ... [2020-08-22 16:38:42,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (1/1) ... [2020-08-22 16:38:42,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (1/1) ... [2020-08-22 16:38:42,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (1/1) ... [2020-08-22 16:38:42,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (1/1) ... [2020-08-22 16:38:42,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:38:42,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:38:42,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:38:42,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:38:42,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (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 [2020-08-22 16:38:42,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:38:42,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:38:42,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:38:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:38:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:38:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:38:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:38:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:38:42,779 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:38:42,779 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:38:42,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:42 BoogieIcfgContainer [2020-08-22 16:38:42,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:38:42,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:38:42,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:38:42,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:38:42,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:38:41" (1/3) ... [2020-08-22 16:38:42,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfbb5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:42, skipping insertion in model container [2020-08-22 16:38:42,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:42" (2/3) ... [2020-08-22 16:38:42,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfbb5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:42, skipping insertion in model container [2020-08-22 16:38:42,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:42" (3/3) ... [2020-08-22 16:38:42,793 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-22 16:38:42,815 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:38:42,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:38:42,865 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:38:42,904 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:38:42,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:38:42,904 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:38:42,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:38:42,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:38:42,905 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:38:42,905 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:38:42,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:38:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-22 16:38:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:38:42,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:42,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:42,930 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:42,936 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-22 16:38:42,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:42,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558881485] [2020-08-22 16:38:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:43,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558881485] [2020-08-22 16:38:43,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:43,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:43,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443278567] [2020-08-22 16:38:43,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:43,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:43,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:43,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,170 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-22 16:38:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:43,251 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-22 16:38:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:43,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 16:38:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:43,266 INFO L225 Difference]: With dead ends: 87 [2020-08-22 16:38:43,267 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 16:38:43,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 16:38:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-22 16:38:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 16:38:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-22 16:38:43,321 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-22 16:38:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:43,322 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-22 16:38:43,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-22 16:38:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:38:43,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:43,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:43,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:38:43,325 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-22 16:38:43,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:43,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429726361] [2020-08-22 16:38:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:43,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429726361] [2020-08-22 16:38:43,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:43,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:43,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580681463] [2020-08-22 16:38:43,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:43,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:43,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,420 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-22 16:38:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:43,449 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-22 16:38:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:43,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 16:38:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:43,452 INFO L225 Difference]: With dead ends: 117 [2020-08-22 16:38:43,452 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 16:38:43,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 16:38:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-22 16:38:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 16:38:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-22 16:38:43,467 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-22 16:38:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:43,467 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-22 16:38:43,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-22 16:38:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:38:43,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:43,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:43,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:38:43,470 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-22 16:38:43,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:43,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235206284] [2020-08-22 16:38:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:43,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235206284] [2020-08-22 16:38:43,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:43,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:43,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84520715] [2020-08-22 16:38:43,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:43,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:43,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:43,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,556 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-22 16:38:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:43,594 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-22 16:38:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:43,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:38:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:43,600 INFO L225 Difference]: With dead ends: 108 [2020-08-22 16:38:43,600 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 16:38:43,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 16:38:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-22 16:38:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 16:38:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-22 16:38:43,622 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-22 16:38:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:43,622 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-22 16:38:43,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-22 16:38:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:38:43,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:43,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:43,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:38:43,626 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:43,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:43,626 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-22 16:38:43,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:43,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678135030] [2020-08-22 16:38:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:43,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678135030] [2020-08-22 16:38:43,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:43,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:43,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681289140] [2020-08-22 16:38:43,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:43,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,675 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-22 16:38:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:43,698 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-22 16:38:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:43,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:38:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:43,701 INFO L225 Difference]: With dead ends: 136 [2020-08-22 16:38:43,701 INFO L226 Difference]: Without dead ends: 134 [2020-08-22 16:38:43,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-22 16:38:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-22 16:38:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 16:38:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-22 16:38:43,716 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-22 16:38:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:43,717 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-22 16:38:43,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-22 16:38:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:38:43,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:43,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:43,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:38:43,719 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-22 16:38:43,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:43,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354476522] [2020-08-22 16:38:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:43,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354476522] [2020-08-22 16:38:43,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:43,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:43,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731040224] [2020-08-22 16:38:43,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:43,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,774 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-22 16:38:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:43,813 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-22 16:38:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:43,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:38:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:43,816 INFO L225 Difference]: With dead ends: 224 [2020-08-22 16:38:43,818 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 16:38:43,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 16:38:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-22 16:38:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 16:38:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-22 16:38:43,844 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-22 16:38:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:43,845 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-22 16:38:43,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-22 16:38:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:38:43,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:43,851 INFO L422 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] [2020-08-22 16:38:43,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:38:43,851 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-22 16:38:43,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:43,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302252569] [2020-08-22 16:38:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:43,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302252569] [2020-08-22 16:38:43,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:43,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:43,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580916127] [2020-08-22 16:38:43,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:43,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,921 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-22 16:38:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:43,939 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-22 16:38:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:43,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:38:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:43,942 INFO L225 Difference]: With dead ends: 201 [2020-08-22 16:38:43,942 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 16:38:43,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 16:38:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-22 16:38:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 16:38:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-22 16:38:43,960 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-22 16:38:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:43,960 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-22 16:38:43,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-22 16:38:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:38:43,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:43,982 INFO L422 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] [2020-08-22 16:38:43,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:38:43,984 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-22 16:38:43,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:43,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572474029] [2020-08-22 16:38:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572474029] [2020-08-22 16:38:44,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71111086] [2020-08-22 16:38:44,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,051 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-22 16:38:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,076 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-22 16:38:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:38:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,078 INFO L225 Difference]: With dead ends: 252 [2020-08-22 16:38:44,079 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 16:38:44,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 16:38:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-22 16:38:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 16:38:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-22 16:38:44,093 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-22 16:38:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,093 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-22 16:38:44,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-22 16:38:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:38:44,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,095 INFO L422 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] [2020-08-22 16:38:44,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 16:38:44,095 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-22 16:38:44,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540620410] [2020-08-22 16:38:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540620410] [2020-08-22 16:38:44,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829243600] [2020-08-22 16:38:44,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,138 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-22 16:38:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,162 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-22 16:38:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:38:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,165 INFO L225 Difference]: With dead ends: 432 [2020-08-22 16:38:44,165 INFO L226 Difference]: Without dead ends: 258 [2020-08-22 16:38:44,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-22 16:38:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-22 16:38:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 16:38:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-22 16:38:44,181 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-22 16:38:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,181 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-22 16:38:44,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-22 16:38:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:38:44,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,183 INFO L422 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] [2020-08-22 16:38:44,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 16:38:44,184 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-22 16:38:44,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135036855] [2020-08-22 16:38:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135036855] [2020-08-22 16:38:44,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059293412] [2020-08-22 16:38:44,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,215 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-22 16:38:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,233 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-22 16:38:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:38:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,236 INFO L225 Difference]: With dead ends: 384 [2020-08-22 16:38:44,236 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 16:38:44,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 16:38:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-22 16:38:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 16:38:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-22 16:38:44,249 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-22 16:38:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,250 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-22 16:38:44,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-22 16:38:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:38:44,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,251 INFO L422 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] [2020-08-22 16:38:44,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 16:38:44,252 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-22 16:38:44,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436116523] [2020-08-22 16:38:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436116523] [2020-08-22 16:38:44,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952320656] [2020-08-22 16:38:44,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,289 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-22 16:38:44,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,310 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-22 16:38:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:38:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,313 INFO L225 Difference]: With dead ends: 476 [2020-08-22 16:38:44,313 INFO L226 Difference]: Without dead ends: 474 [2020-08-22 16:38:44,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-22 16:38:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-22 16:38:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 16:38:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-22 16:38:44,328 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-22 16:38:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,329 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-22 16:38:44,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-22 16:38:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:38:44,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,331 INFO L422 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] [2020-08-22 16:38:44,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 16:38:44,331 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,331 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-22 16:38:44,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665306843] [2020-08-22 16:38:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665306843] [2020-08-22 16:38:44,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853336387] [2020-08-22 16:38:44,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,362 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-22 16:38:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,387 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-22 16:38:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:38:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,390 INFO L225 Difference]: With dead ends: 844 [2020-08-22 16:38:44,390 INFO L226 Difference]: Without dead ends: 498 [2020-08-22 16:38:44,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-22 16:38:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-22 16:38:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-22 16:38:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-22 16:38:44,410 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-22 16:38:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,410 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-22 16:38:44,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-22 16:38:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:38:44,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,412 INFO L422 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] [2020-08-22 16:38:44,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 16:38:44,412 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-22 16:38:44,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980038728] [2020-08-22 16:38:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980038728] [2020-08-22 16:38:44,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478343426] [2020-08-22 16:38:44,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,438 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-22 16:38:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,461 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-22 16:38:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:38:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,463 INFO L225 Difference]: With dead ends: 744 [2020-08-22 16:38:44,464 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 16:38:44,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 16:38:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-22 16:38:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-22 16:38:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-22 16:38:44,481 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-22 16:38:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,482 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-22 16:38:44,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-22 16:38:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:38:44,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,483 INFO L422 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] [2020-08-22 16:38:44,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 16:38:44,484 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-22 16:38:44,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848967169] [2020-08-22 16:38:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848967169] [2020-08-22 16:38:44,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607677473] [2020-08-22 16:38:44,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,512 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-22 16:38:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,550 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-22 16:38:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:38:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,556 INFO L225 Difference]: With dead ends: 908 [2020-08-22 16:38:44,556 INFO L226 Difference]: Without dead ends: 906 [2020-08-22 16:38:44,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-22 16:38:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-22 16:38:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-22 16:38:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-22 16:38:44,579 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-22 16:38:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,579 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-22 16:38:44,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-22 16:38:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:38:44,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,581 INFO L422 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] [2020-08-22 16:38:44,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 16:38:44,581 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-22 16:38:44,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023362841] [2020-08-22 16:38:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023362841] [2020-08-22 16:38:44,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659736786] [2020-08-22 16:38:44,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,624 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-22 16:38:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,658 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-22 16:38:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:38:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,664 INFO L225 Difference]: With dead ends: 1660 [2020-08-22 16:38:44,664 INFO L226 Difference]: Without dead ends: 970 [2020-08-22 16:38:44,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-22 16:38:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-22 16:38:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-22 16:38:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-22 16:38:44,704 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-22 16:38:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,704 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-22 16:38:44,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-22 16:38:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:38:44,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,707 INFO L422 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] [2020-08-22 16:38:44,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 16:38:44,707 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-22 16:38:44,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378896272] [2020-08-22 16:38:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378896272] [2020-08-22 16:38:44,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244269718] [2020-08-22 16:38:44,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,748 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-22 16:38:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,784 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-22 16:38:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:38:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,790 INFO L225 Difference]: With dead ends: 1452 [2020-08-22 16:38:44,790 INFO L226 Difference]: Without dead ends: 986 [2020-08-22 16:38:44,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-22 16:38:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-22 16:38:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-22 16:38:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-22 16:38:44,833 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-22 16:38:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,833 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-22 16:38:44,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-22 16:38:44,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:38:44,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,835 INFO L422 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] [2020-08-22 16:38:44,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 16:38:44,835 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-22 16:38:44,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703627755] [2020-08-22 16:38:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703627755] [2020-08-22 16:38:44,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626656890] [2020-08-22 16:38:44,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,859 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-22 16:38:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:44,892 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-22 16:38:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:44,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:38:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:44,901 INFO L225 Difference]: With dead ends: 1740 [2020-08-22 16:38:44,901 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 16:38:44,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 16:38:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-22 16:38:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-22 16:38:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-22 16:38:44,946 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-22 16:38:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:44,947 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-22 16:38:44,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-22 16:38:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:38:44,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:44,950 INFO L422 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] [2020-08-22 16:38:44,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 16:38:44,950 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:44,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-22 16:38:44,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:44,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932229319] [2020-08-22 16:38:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:44,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932229319] [2020-08-22 16:38:44,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:44,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:44,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741539620] [2020-08-22 16:38:44,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:44,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:44,974 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-22 16:38:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:45,024 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-22 16:38:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:45,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:38:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:45,037 INFO L225 Difference]: With dead ends: 3276 [2020-08-22 16:38:45,037 INFO L226 Difference]: Without dead ends: 1898 [2020-08-22 16:38:45,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-22 16:38:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-22 16:38:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-22 16:38:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-22 16:38:45,122 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-22 16:38:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:45,122 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-22 16:38:45,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-22 16:38:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:38:45,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:45,127 INFO L422 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] [2020-08-22 16:38:45,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 16:38:45,128 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-22 16:38:45,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:45,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459986317] [2020-08-22 16:38:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:45,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459986317] [2020-08-22 16:38:45,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:45,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:45,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105543142] [2020-08-22 16:38:45,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:45,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,174 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-22 16:38:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:45,236 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-22 16:38:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:45,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:38:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:45,250 INFO L225 Difference]: With dead ends: 2844 [2020-08-22 16:38:45,250 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 16:38:45,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 16:38:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-22 16:38:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-22 16:38:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-22 16:38:45,334 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-22 16:38:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:45,334 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-22 16:38:45,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-22 16:38:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:38:45,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:45,339 INFO L422 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] [2020-08-22 16:38:45,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 16:38:45,340 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-22 16:38:45,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:45,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671374255] [2020-08-22 16:38:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:45,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671374255] [2020-08-22 16:38:45,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:45,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:45,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62316982] [2020-08-22 16:38:45,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:45,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,373 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-22 16:38:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:45,471 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-22 16:38:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:45,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:38:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:45,485 INFO L225 Difference]: With dead ends: 3340 [2020-08-22 16:38:45,486 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 16:38:45,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 16:38:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-22 16:38:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-22 16:38:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-22 16:38:45,578 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-22 16:38:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:45,578 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-22 16:38:45,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-22 16:38:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:38:45,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:45,584 INFO L422 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] [2020-08-22 16:38:45,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 16:38:45,584 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-22 16:38:45,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:45,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520529183] [2020-08-22 16:38:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:45,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520529183] [2020-08-22 16:38:45,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:45,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:45,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167395256] [2020-08-22 16:38:45,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:45,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:45,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,608 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-22 16:38:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:45,675 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-22 16:38:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:45,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:38:45,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:45,693 INFO L225 Difference]: With dead ends: 6476 [2020-08-22 16:38:45,694 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 16:38:45,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 16:38:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-22 16:38:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-22 16:38:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-22 16:38:45,809 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-22 16:38:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:45,809 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-22 16:38:45,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-22 16:38:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:38:45,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:45,815 INFO L422 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] [2020-08-22 16:38:45,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 16:38:45,817 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-22 16:38:45,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:45,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434150339] [2020-08-22 16:38:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:45,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434150339] [2020-08-22 16:38:45,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:45,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:45,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569532109] [2020-08-22 16:38:45,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:45,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:45,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:45,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,849 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-22 16:38:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:45,912 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-22 16:38:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:45,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:38:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:45,931 INFO L225 Difference]: With dead ends: 5580 [2020-08-22 16:38:45,931 INFO L226 Difference]: Without dead ends: 3786 [2020-08-22 16:38:45,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-22 16:38:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-22 16:38:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-22 16:38:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-22 16:38:46,067 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-22 16:38:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,067 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-22 16:38:46,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-22 16:38:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:38:46,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,072 INFO L422 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] [2020-08-22 16:38:46,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 16:38:46,073 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-22 16:38:46,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564244306] [2020-08-22 16:38:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564244306] [2020-08-22 16:38:46,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816368127] [2020-08-22 16:38:46,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,104 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-22 16:38:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,203 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-22 16:38:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:38:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,248 INFO L225 Difference]: With dead ends: 10956 [2020-08-22 16:38:46,248 INFO L226 Difference]: Without dead ends: 7306 [2020-08-22 16:38:46,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-22 16:38:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-22 16:38:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 16:38:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-22 16:38:46,472 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-22 16:38:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,472 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-22 16:38:46,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-22 16:38:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:38:46,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,485 INFO L422 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] [2020-08-22 16:38:46,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 16:38:46,486 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-22 16:38:46,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348984313] [2020-08-22 16:38:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348984313] [2020-08-22 16:38:46,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637769189] [2020-08-22 16:38:46,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,535 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-22 16:38:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,703 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-22 16:38:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:38:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,719 INFO L225 Difference]: With dead ends: 8076 [2020-08-22 16:38:46,720 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 16:38:46,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 16:38:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-22 16:38:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 16:38:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-22 16:38:46,910 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-22 16:38:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,911 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-22 16:38:46,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-22 16:38:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:38:46,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,921 INFO L422 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] [2020-08-22 16:38:46,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 16:38:46,921 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-22 16:38:46,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443611806] [2020-08-22 16:38:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443611806] [2020-08-22 16:38:46,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490910464] [2020-08-22 16:38:46,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,960 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-22 16:38:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,147 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-22 16:38:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 16:38:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,169 INFO L225 Difference]: With dead ends: 12172 [2020-08-22 16:38:47,169 INFO L226 Difference]: Without dead ends: 12170 [2020-08-22 16:38:47,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-22 16:38:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-22 16:38:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-22 16:38:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-22 16:38:47,405 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-22 16:38:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,406 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-22 16:38:47,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-22 16:38:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:38:47,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,424 INFO L422 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] [2020-08-22 16:38:47,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 16:38:47,425 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-22 16:38:47,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002375450] [2020-08-22 16:38:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002375450] [2020-08-22 16:38:47,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307972399] [2020-08-22 16:38:47,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,449 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-22 16:38:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,694 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-22 16:38:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 16:38:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,736 INFO L225 Difference]: With dead ends: 25228 [2020-08-22 16:38:47,736 INFO L226 Difference]: Without dead ends: 14218 [2020-08-22 16:38:47,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-22 16:38:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-22 16:38:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-22 16:38:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-22 16:38:48,406 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-22 16:38:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:48,407 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-22 16:38:48,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-22 16:38:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 16:38:48,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:48,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:48,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 16:38:48,434 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:48,435 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-22 16:38:48,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:48,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784704495] [2020-08-22 16:38:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:48,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784704495] [2020-08-22 16:38:48,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:48,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:48,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033561346] [2020-08-22 16:38:48,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:48,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,467 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-22 16:38:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:48,752 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-22 16:38:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:48,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 16:38:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:48,793 INFO L225 Difference]: With dead ends: 21516 [2020-08-22 16:38:48,793 INFO L226 Difference]: Without dead ends: 14602 [2020-08-22 16:38:48,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-22 16:38:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-22 16:38:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-22 16:38:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-22 16:38:49,355 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-22 16:38:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:49,355 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-22 16:38:49,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-22 16:38:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 16:38:49,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:49,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:49,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 16:38:49,378 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:49,379 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-22 16:38:49,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:49,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297633237] [2020-08-22 16:38:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:49,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:49,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297633237] [2020-08-22 16:38:49,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:49,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:49,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305735067] [2020-08-22 16:38:49,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:49,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:49,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:49,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:49,406 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-22 16:38:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:49,696 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-22 16:38:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:49,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 16:38:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:49,747 INFO L225 Difference]: With dead ends: 23562 [2020-08-22 16:38:49,747 INFO L226 Difference]: Without dead ends: 23560 [2020-08-22 16:38:49,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-22 16:38:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-22 16:38:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-22 16:38:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-22 16:38:50,676 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-22 16:38:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:50,676 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-22 16:38:50,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-22 16:38:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 16:38:50,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:50,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:50,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 16:38:50,712 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:50,712 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-22 16:38:50,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:50,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233006413] [2020-08-22 16:38:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:50,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:50,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233006413] [2020-08-22 16:38:50,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:50,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:50,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639298402] [2020-08-22 16:38:50,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:50,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:50,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:50,738 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-22 16:38:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:51,178 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-22 16:38:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:51,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 16:38:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:51,180 INFO L225 Difference]: With dead ends: 50184 [2020-08-22 16:38:51,180 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:38:51,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:51,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:38:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:38:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:38:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:38:51,279 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-22 16:38:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:51,279 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:38:51,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:51,280 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:38:51,280 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:38:51,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 16:38:51,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:38:51,325 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:38:51,325 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:38:51,325 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:38:51,326 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:38:51,326 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:38:51,326 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:38:51,326 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-22 16:38:51,327 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-22 16:38:51,327 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,327 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,327 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,328 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,328 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-22 16:38:51,329 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,329 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-22 16:38:51,329 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,329 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,329 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,330 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-22 16:38:51,330 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-22 16:38:51,330 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-22 16:38:51,330 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-22 16:38:51,330 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-22 16:38:51,331 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-22 16:38:51,331 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-22 16:38:51,331 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,331 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,331 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-22 16:38:51,331 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-22 16:38:51,332 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,332 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,332 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,332 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,332 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,333 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-22 16:38:51,333 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,333 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-22 16:38:51,333 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,333 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-22 16:38:51,333 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-22 16:38:51,334 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,334 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 16:38:51,334 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-22 16:38:51,334 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-22 16:38:51,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:38:51 BoogieIcfgContainer [2020-08-22 16:38:51,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:38:51,360 INFO L168 Benchmark]: Toolchain (without parser) took 9379.31 ms. Allocated memory was 140.0 MB in the beginning and 638.6 MB in the end (delta: 498.6 MB). Free memory was 102.9 MB in the beginning and 436.8 MB in the end (delta: -333.9 MB). Peak memory consumption was 164.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:51,363 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:38:51,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.31 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.4 MB in the beginning and 181.9 MB in the end (delta: -79.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:51,370 INFO L168 Benchmark]: Boogie Preprocessor took 39.76 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 179.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:51,370 INFO L168 Benchmark]: RCFGBuilder took 355.52 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 159.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:51,371 INFO L168 Benchmark]: TraceAbstraction took 8570.33 ms. Allocated memory was 202.9 MB in the beginning and 638.6 MB in the end (delta: 435.7 MB). Free memory was 159.7 MB in the beginning and 436.8 MB in the end (delta: -277.1 MB). Peak memory consumption was 158.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:51,378 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 408.31 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.4 MB in the beginning and 181.9 MB in the end (delta: -79.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.76 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 179.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 355.52 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 159.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8570.33 ms. Allocated memory was 202.9 MB in the beginning and 638.6 MB in the end (delta: 435.7 MB). Free memory was 159.7 MB in the beginning and 436.8 MB in the end (delta: -277.1 MB). Peak memory consumption was 158.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.3s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 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 proved your program to be correct! Received shutdown request...