/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:28:14,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:28:14,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:28:14,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:28:14,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:28:14,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:28:14,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:28:14,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:28:14,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:28:14,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:28:14,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:28:14,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:28:14,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:28:14,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:28:14,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:28:14,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:28:14,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:28:14,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:28:14,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:28:14,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:28:14,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:28:14,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:28:14,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:28:14,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:28:14,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:28:14,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:28:14,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:28:14,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:28:14,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:28:14,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:28:14,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:28:14,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:28:14,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:28:14,838 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:28:14,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:28:14,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:28:14,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:28:14,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:28:14,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:28:14,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:28:14,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:28:14,839 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:28:14,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:28:14,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:28:14,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:28:14,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:28:14,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:28:14,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:28:14,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:28:14,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:28:14,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:28:14,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:28:14,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:28:14,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:28:14,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:28:15,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:28:15,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:28:15,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:28:15,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:28:15,258 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:28:15,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:28:15,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/468387b76/cc08c9c852bc426d9b0c0722673a9294/FLAGb60e05b96 [2020-12-22 08:28:16,402 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:28:16,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:28:16,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/468387b76/cc08c9c852bc426d9b0c0722673a9294/FLAGb60e05b96 [2020-12-22 08:28:16,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/468387b76/cc08c9c852bc426d9b0c0722673a9294 [2020-12-22 08:28:16,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:28:16,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:28:16,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:28:16,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:28:16,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:28:16,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:28:16" (1/1) ... [2020-12-22 08:28:16,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69adf1d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:16, skipping insertion in model container [2020-12-22 08:28:16,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:28:16" (1/1) ... [2020-12-22 08:28:16,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:28:17,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:28:17,765 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18950,18963] [2020-12-22 08:28:19,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:28:19,444 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:28:19,556 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18950,18963] [2020-12-22 08:28:20,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:28:20,772 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:28:20,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20 WrapperNode [2020-12-22 08:28:20,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:28:20,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:28:20,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:28:20,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:28:20,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:20,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:28:21,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:28:21,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:28:21,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:28:21,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (1/1) ... [2020-12-22 08:28:21,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:28:21,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:28:21,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:28:21,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:28:21,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (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 [2020-12-22 08:28:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:28:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:28:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:28:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:28:32,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:28:32,463 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:28:32,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:28:32 BoogieIcfgContainer [2020-12-22 08:28:32,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:28:32,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:28:32,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:28:32,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:28:32,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:28:16" (1/3) ... [2020-12-22 08:28:32,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427627fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:28:32, skipping insertion in model container [2020-12-22 08:28:32,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:20" (2/3) ... [2020-12-22 08:28:32,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427627fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:28:32, skipping insertion in model container [2020-12-22 08:28:32,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:28:32" (3/3) ... [2020-12-22 08:28:32,479 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:28:32,486 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:28:32,495 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:28:32,517 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:28:32,560 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:28:32,560 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:28:32,561 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:28:32,561 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:28:32,561 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:28:32,561 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:28:32,561 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:28:32,561 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:28:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states. [2020-12-22 08:28:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:28:32,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:32,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:32,659 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:32,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2083361813, now seen corresponding path program 1 times [2020-12-22 08:28:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670179176] [2020-12-22 08:28:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:33,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670179176] [2020-12-22 08:28:33,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:33,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:33,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872531778] [2020-12-22 08:28:33,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:33,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:33,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:33,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:33,459 INFO L87 Difference]: Start difference. First operand 2868 states. Second operand 6 states. [2020-12-22 08:28:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:36,033 INFO L93 Difference]: Finished difference Result 4490 states and 8411 transitions. [2020-12-22 08:28:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:36,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:28:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:36,066 INFO L225 Difference]: With dead ends: 4490 [2020-12-22 08:28:36,066 INFO L226 Difference]: Without dead ends: 2484 [2020-12-22 08:28:36,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:28:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2020-12-22 08:28:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2480. [2020-12-22 08:28:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2480 states. [2020-12-22 08:28:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 3286 transitions. [2020-12-22 08:28:36,252 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 3286 transitions. Word has length 78 [2020-12-22 08:28:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:36,253 INFO L481 AbstractCegarLoop]: Abstraction has 2480 states and 3286 transitions. [2020-12-22 08:28:36,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:28:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 3286 transitions. [2020-12-22 08:28:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:28:36,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:36,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:36,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:28:36,263 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:36,265 INFO L82 PathProgramCache]: Analyzing trace with hash 696230651, now seen corresponding path program 1 times [2020-12-22 08:28:36,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:36,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373707856] [2020-12-22 08:28:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:36,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373707856] [2020-12-22 08:28:36,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:36,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796155707] [2020-12-22 08:28:36,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:36,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:36,500 INFO L87 Difference]: Start difference. First operand 2480 states and 3286 transitions. Second operand 3 states. [2020-12-22 08:28:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:36,650 INFO L93 Difference]: Finished difference Result 4136 states and 5592 transitions. [2020-12-22 08:28:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:36,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:28:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:36,671 INFO L225 Difference]: With dead ends: 4136 [2020-12-22 08:28:36,671 INFO L226 Difference]: Without dead ends: 3613 [2020-12-22 08:28:36,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2020-12-22 08:28:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3609. [2020-12-22 08:28:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3609 states. [2020-12-22 08:28:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 4769 transitions. [2020-12-22 08:28:36,796 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 4769 transitions. Word has length 79 [2020-12-22 08:28:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:36,797 INFO L481 AbstractCegarLoop]: Abstraction has 3609 states and 4769 transitions. [2020-12-22 08:28:36,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 4769 transitions. [2020-12-22 08:28:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:28:36,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:36,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:36,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:28:36,806 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1756459889, now seen corresponding path program 1 times [2020-12-22 08:28:36,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:36,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892083781] [2020-12-22 08:28:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:37,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892083781] [2020-12-22 08:28:37,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:37,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:37,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618824329] [2020-12-22 08:28:37,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:37,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:37,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:37,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:37,029 INFO L87 Difference]: Start difference. First operand 3609 states and 4769 transitions. Second operand 6 states. [2020-12-22 08:28:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:38,848 INFO L93 Difference]: Finished difference Result 7033 states and 9748 transitions. [2020-12-22 08:28:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:38,849 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 08:28:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:38,872 INFO L225 Difference]: With dead ends: 7033 [2020-12-22 08:28:38,873 INFO L226 Difference]: Without dead ends: 4312 [2020-12-22 08:28:38,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:28:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2020-12-22 08:28:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4308. [2020-12-22 08:28:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4308 states. [2020-12-22 08:28:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 6055 transitions. [2020-12-22 08:28:39,070 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 6055 transitions. Word has length 79 [2020-12-22 08:28:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:39,070 INFO L481 AbstractCegarLoop]: Abstraction has 4308 states and 6055 transitions. [2020-12-22 08:28:39,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:28:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 6055 transitions. [2020-12-22 08:28:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:28:39,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:39,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:39,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:28:39,080 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash 755426614, now seen corresponding path program 1 times [2020-12-22 08:28:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:39,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536522922] [2020-12-22 08:28:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:39,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536522922] [2020-12-22 08:28:39,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:39,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:39,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389710511] [2020-12-22 08:28:39,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:39,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:39,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:39,225 INFO L87 Difference]: Start difference. First operand 4308 states and 6055 transitions. Second operand 3 states. [2020-12-22 08:28:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:39,469 INFO L93 Difference]: Finished difference Result 8513 states and 12261 transitions. [2020-12-22 08:28:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:39,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 08:28:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:39,505 INFO L225 Difference]: With dead ends: 8513 [2020-12-22 08:28:39,505 INFO L226 Difference]: Without dead ends: 6262 [2020-12-22 08:28:39,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6262 states. [2020-12-22 08:28:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6262 to 6250. [2020-12-22 08:28:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6250 states. [2020-12-22 08:28:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6250 states to 6250 states and 8764 transitions. [2020-12-22 08:28:39,794 INFO L78 Accepts]: Start accepts. Automaton has 6250 states and 8764 transitions. Word has length 80 [2020-12-22 08:28:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:39,795 INFO L481 AbstractCegarLoop]: Abstraction has 6250 states and 8764 transitions. [2020-12-22 08:28:39,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6250 states and 8764 transitions. [2020-12-22 08:28:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:28:39,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:39,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:39,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:28:39,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1741372445, now seen corresponding path program 1 times [2020-12-22 08:28:39,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:39,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712696754] [2020-12-22 08:28:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:39,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712696754] [2020-12-22 08:28:39,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:39,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:39,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518297535] [2020-12-22 08:28:39,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:39,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:39,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:39,935 INFO L87 Difference]: Start difference. First operand 6250 states and 8764 transitions. Second operand 3 states. [2020-12-22 08:28:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:40,470 INFO L93 Difference]: Finished difference Result 12410 states and 18078 transitions. [2020-12-22 08:28:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:40,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 08:28:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:40,516 INFO L225 Difference]: With dead ends: 12410 [2020-12-22 08:28:40,516 INFO L226 Difference]: Without dead ends: 9121 [2020-12-22 08:28:40,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9121 states. [2020-12-22 08:28:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9121 to 9119. [2020-12-22 08:28:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9119 states. [2020-12-22 08:28:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9119 states to 9119 states and 12993 transitions. [2020-12-22 08:28:40,949 INFO L78 Accepts]: Start accepts. Automaton has 9119 states and 12993 transitions. Word has length 80 [2020-12-22 08:28:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:40,950 INFO L481 AbstractCegarLoop]: Abstraction has 9119 states and 12993 transitions. [2020-12-22 08:28:40,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 9119 states and 12993 transitions. [2020-12-22 08:28:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:28:40,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:40,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:40,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:28:40,964 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1805139037, now seen corresponding path program 1 times [2020-12-22 08:28:40,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:40,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275072150] [2020-12-22 08:28:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:41,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275072150] [2020-12-22 08:28:41,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:41,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:41,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581673407] [2020-12-22 08:28:41,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:41,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:41,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:41,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:41,092 INFO L87 Difference]: Start difference. First operand 9119 states and 12993 transitions. Second operand 3 states. [2020-12-22 08:28:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:41,802 INFO L93 Difference]: Finished difference Result 19592 states and 28580 transitions. [2020-12-22 08:28:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:41,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 08:28:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:41,847 INFO L225 Difference]: With dead ends: 19592 [2020-12-22 08:28:41,847 INFO L226 Difference]: Without dead ends: 14560 [2020-12-22 08:28:41,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14560 states. [2020-12-22 08:28:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14560 to 14558. [2020-12-22 08:28:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14558 states. [2020-12-22 08:28:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 20826 transitions. [2020-12-22 08:28:42,711 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 20826 transitions. Word has length 80 [2020-12-22 08:28:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:42,712 INFO L481 AbstractCegarLoop]: Abstraction has 14558 states and 20826 transitions. [2020-12-22 08:28:42,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 20826 transitions. [2020-12-22 08:28:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:28:42,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:42,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:42,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:28:42,733 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:42,734 INFO L82 PathProgramCache]: Analyzing trace with hash 615077837, now seen corresponding path program 1 times [2020-12-22 08:28:42,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:42,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081176060] [2020-12-22 08:28:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:42,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081176060] [2020-12-22 08:28:42,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:42,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:28:42,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846634470] [2020-12-22 08:28:42,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:28:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:28:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:28:42,922 INFO L87 Difference]: Start difference. First operand 14558 states and 20826 transitions. Second operand 5 states. [2020-12-22 08:28:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:45,278 INFO L93 Difference]: Finished difference Result 31141 states and 44967 transitions. [2020-12-22 08:28:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:45,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-12-22 08:28:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:45,333 INFO L225 Difference]: With dead ends: 31141 [2020-12-22 08:28:45,334 INFO L226 Difference]: Without dead ends: 18359 [2020-12-22 08:28:45,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18359 states. [2020-12-22 08:28:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18359 to 18307. [2020-12-22 08:28:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18307 states. [2020-12-22 08:28:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18307 states to 18307 states and 26134 transitions. [2020-12-22 08:28:46,375 INFO L78 Accepts]: Start accepts. Automaton has 18307 states and 26134 transitions. Word has length 80 [2020-12-22 08:28:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:46,375 INFO L481 AbstractCegarLoop]: Abstraction has 18307 states and 26134 transitions. [2020-12-22 08:28:46,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:28:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18307 states and 26134 transitions. [2020-12-22 08:28:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:28:46,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:46,394 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:46,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:28:46,395 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:46,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2001968836, now seen corresponding path program 1 times [2020-12-22 08:28:46,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:46,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304192169] [2020-12-22 08:28:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:46,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304192169] [2020-12-22 08:28:46,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:46,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:28:46,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906348215] [2020-12-22 08:28:46,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:28:46,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:28:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:28:46,589 INFO L87 Difference]: Start difference. First operand 18307 states and 26134 transitions. Second operand 5 states. [2020-12-22 08:28:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:48,764 INFO L93 Difference]: Finished difference Result 41496 states and 59810 transitions. [2020-12-22 08:28:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:48,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-12-22 08:28:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:48,831 INFO L225 Difference]: With dead ends: 41496 [2020-12-22 08:28:48,831 INFO L226 Difference]: Without dead ends: 24452 [2020-12-22 08:28:48,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24452 states. [2020-12-22 08:28:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24452 to 24375. [2020-12-22 08:28:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24375 states. [2020-12-22 08:28:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24375 states to 24375 states and 34919 transitions. [2020-12-22 08:28:50,134 INFO L78 Accepts]: Start accepts. Automaton has 24375 states and 34919 transitions. Word has length 80 [2020-12-22 08:28:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:50,135 INFO L481 AbstractCegarLoop]: Abstraction has 24375 states and 34919 transitions. [2020-12-22 08:28:50,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:28:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 24375 states and 34919 transitions. [2020-12-22 08:28:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:28:50,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:50,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:50,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:28:50,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1263891130, now seen corresponding path program 1 times [2020-12-22 08:28:50,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:50,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996918130] [2020-12-22 08:28:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:50,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996918130] [2020-12-22 08:28:50,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:50,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:50,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860380577] [2020-12-22 08:28:50,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:50,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:50,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:50,316 INFO L87 Difference]: Start difference. First operand 24375 states and 34919 transitions. Second operand 6 states. [2020-12-22 08:28:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:53,975 INFO L93 Difference]: Finished difference Result 84554 states and 122327 transitions. [2020-12-22 08:28:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:53,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 08:28:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:54,109 INFO L225 Difference]: With dead ends: 84554 [2020-12-22 08:28:54,110 INFO L226 Difference]: Without dead ends: 60857 [2020-12-22 08:28:54,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:28:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60857 states. [2020-12-22 08:28:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60857 to 60853. [2020-12-22 08:28:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60853 states. [2020-12-22 08:28:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60853 states to 60853 states and 87732 transitions. [2020-12-22 08:28:57,182 INFO L78 Accepts]: Start accepts. Automaton has 60853 states and 87732 transitions. Word has length 81 [2020-12-22 08:28:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:57,183 INFO L481 AbstractCegarLoop]: Abstraction has 60853 states and 87732 transitions. [2020-12-22 08:28:57,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:28:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 60853 states and 87732 transitions. [2020-12-22 08:28:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:28:57,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:57,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:57,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:28:57,214 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1764927193, now seen corresponding path program 1 times [2020-12-22 08:28:57,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:57,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326619896] [2020-12-22 08:28:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:57,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326619896] [2020-12-22 08:28:57,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:57,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:57,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117336981] [2020-12-22 08:28:57,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:57,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:57,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:57,327 INFO L87 Difference]: Start difference. First operand 60853 states and 87732 transitions. Second operand 3 states. [2020-12-22 08:29:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:01,361 INFO L93 Difference]: Finished difference Result 147625 states and 213959 transitions. [2020-12-22 08:29:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:29:01,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 08:29:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:01,605 INFO L225 Difference]: With dead ends: 147625 [2020-12-22 08:29:01,610 INFO L226 Difference]: Without dead ends: 91613 [2020-12-22 08:29:01,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:29:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91613 states. [2020-12-22 08:29:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91613 to 91161. [2020-12-22 08:29:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91161 states. [2020-12-22 08:29:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91161 states to 91161 states and 130427 transitions. [2020-12-22 08:29:06,629 INFO L78 Accepts]: Start accepts. Automaton has 91161 states and 130427 transitions. Word has length 82 [2020-12-22 08:29:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:06,630 INFO L481 AbstractCegarLoop]: Abstraction has 91161 states and 130427 transitions. [2020-12-22 08:29:06,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:29:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 91161 states and 130427 transitions. [2020-12-22 08:29:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:29:06,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:06,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:29:06,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:29:06,667 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash -217361814, now seen corresponding path program 1 times [2020-12-22 08:29:06,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:06,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390106522] [2020-12-22 08:29:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:29:06,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390106522] [2020-12-22 08:29:06,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:29:06,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:29:06,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992050555] [2020-12-22 08:29:06,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:29:06,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:06,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:29:06,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:29:06,854 INFO L87 Difference]: Start difference. First operand 91161 states and 130427 transitions. Second operand 7 states. [2020-12-22 08:29:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:29,990 INFO L93 Difference]: Finished difference Result 465540 states and 671182 transitions. [2020-12-22 08:29:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:29:29,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-12-22 08:29:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:30,957 INFO L225 Difference]: With dead ends: 465540 [2020-12-22 08:29:30,958 INFO L226 Difference]: Without dead ends: 420310 [2020-12-22 08:29:31,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:29:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420310 states. [2020-12-22 08:29:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420310 to 91469. [2020-12-22 08:29:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91469 states. [2020-12-22 08:29:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91469 states to 91469 states and 130835 transitions. [2020-12-22 08:29:40,211 INFO L78 Accepts]: Start accepts. Automaton has 91469 states and 130835 transitions. Word has length 83 [2020-12-22 08:29:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:40,211 INFO L481 AbstractCegarLoop]: Abstraction has 91469 states and 130835 transitions. [2020-12-22 08:29:40,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:29:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 91469 states and 130835 transitions. [2020-12-22 08:29:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:29:40,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:40,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:29:40,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:29:40,236 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash -830064994, now seen corresponding path program 1 times [2020-12-22 08:29:40,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:40,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947740518] [2020-12-22 08:29:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:29:40,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947740518] [2020-12-22 08:29:40,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:29:40,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:29:40,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116455245] [2020-12-22 08:29:40,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:29:40,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:40,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:29:40,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:29:40,384 INFO L87 Difference]: Start difference. First operand 91469 states and 130835 transitions. Second operand 7 states. [2020-12-22 08:30:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:30:10,397 INFO L93 Difference]: Finished difference Result 422622 states and 608844 transitions. [2020-12-22 08:30:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:30:10,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-12-22 08:30:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:30:11,188 INFO L225 Difference]: With dead ends: 422622 [2020-12-22 08:30:11,188 INFO L226 Difference]: Without dead ends: 377640 [2020-12-22 08:30:11,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:30:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377640 states. [2020-12-22 08:30:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377640 to 92129. [2020-12-22 08:30:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92129 states. [2020-12-22 08:30:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92129 states to 92129 states and 131715 transitions. [2020-12-22 08:30:21,645 INFO L78 Accepts]: Start accepts. Automaton has 92129 states and 131715 transitions. Word has length 83 [2020-12-22 08:30:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:30:21,645 INFO L481 AbstractCegarLoop]: Abstraction has 92129 states and 131715 transitions. [2020-12-22 08:30:21,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:30:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 92129 states and 131715 transitions. [2020-12-22 08:30:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:30:21,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:30:21,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:30:21,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:30:21,672 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:30:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:30:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1832940740, now seen corresponding path program 1 times [2020-12-22 08:30:21,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:30:21,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097502894] [2020-12-22 08:30:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:30:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:30:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:30:21,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097502894] [2020-12-22 08:30:21,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:30:21,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:30:21,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138718277] [2020-12-22 08:30:21,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:30:21,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:30:21,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:30:21,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:30:21,811 INFO L87 Difference]: Start difference. First operand 92129 states and 131715 transitions. Second operand 7 states. [2020-12-22 08:31:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:06,023 INFO L93 Difference]: Finished difference Result 511766 states and 738466 transitions. [2020-12-22 08:31:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:31:06,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-12-22 08:31:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:07,260 INFO L225 Difference]: With dead ends: 511766 [2020-12-22 08:31:07,261 INFO L226 Difference]: Without dead ends: 465908 [2020-12-22 08:31:07,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:31:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465908 states. [2020-12-22 08:31:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465908 to 92299. [2020-12-22 08:31:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92299 states. [2020-12-22 08:31:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92299 states to 92299 states and 131935 transitions. [2020-12-22 08:31:20,437 INFO L78 Accepts]: Start accepts. Automaton has 92299 states and 131935 transitions. Word has length 83 [2020-12-22 08:31:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:20,437 INFO L481 AbstractCegarLoop]: Abstraction has 92299 states and 131935 transitions. [2020-12-22 08:31:20,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:31:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 92299 states and 131935 transitions. [2020-12-22 08:31:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:31:20,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:20,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:20,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:31:20,479 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:20,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2021677264, now seen corresponding path program 1 times [2020-12-22 08:31:20,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:20,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763408254] [2020-12-22 08:31:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:31:20,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763408254] [2020-12-22 08:31:20,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:20,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:31:20,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334370591] [2020-12-22 08:31:20,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:31:20,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:31:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:31:20,661 INFO L87 Difference]: Start difference. First operand 92299 states and 131935 transitions. Second operand 7 states. [2020-12-22 08:31:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:58,948 INFO L93 Difference]: Finished difference Result 366611 states and 528527 transitions. [2020-12-22 08:31:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:31:58,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-12-22 08:31:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:59,824 INFO L225 Difference]: With dead ends: 366611 [2020-12-22 08:31:59,824 INFO L226 Difference]: Without dead ends: 314913 [2020-12-22 08:31:59,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:32:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314913 states.