/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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:46:01,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:46:01,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:46:01,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:46:01,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:46:01,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:46:01,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:46:01,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:46:01,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:46:01,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:46:01,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:46:01,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:46:01,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:46:01,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:46:01,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:46:01,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:46:01,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:46:01,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:46:01,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:46:01,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:46:01,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:46:01,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:46:01,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:46:01,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:46:01,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:46:01,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:46:01,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:46:01,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:46:01,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:46:01,871 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:46:01,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:46:01,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:46:01,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:46:01,874 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:46:01,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:46:01,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:46:01,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:46:01,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:46:01,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:46:01,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:46:01,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:46:01,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:46:01,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:46:01,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:46:01,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:46:01,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:46:01,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:46:01,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:46:01,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:46:01,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:46:01,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:46:01,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:46:01,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:46:01,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:46:01,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:46:02,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:46:02,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:46:02,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:46:02,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:46:02,354 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:46:02,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:46:02,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de81408/82fb0e4f89654e7594fd1c4948def287/FLAG24c1bb4f2 [2020-12-22 09:46:03,351 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:46:03,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:46:03,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de81408/82fb0e4f89654e7594fd1c4948def287/FLAG24c1bb4f2 [2020-12-22 09:46:03,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de81408/82fb0e4f89654e7594fd1c4948def287 [2020-12-22 09:46:03,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:46:03,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:46:03,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:46:03,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:46:03,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:46:03,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:46:03" (1/1) ... [2020-12-22 09:46:03,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4ec927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:03, skipping insertion in model container [2020-12-22 09:46:03,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:46:03" (1/1) ... [2020-12-22 09:46:03,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:46:04,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:46:04,392 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[8784,8797] [2020-12-22 09:46:04,421 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[10416,10429] [2020-12-22 09:46:05,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:46:05,708 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:46:05,753 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[8784,8797] [2020-12-22 09:46:05,758 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[10416,10429] [2020-12-22 09:46:06,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:46:06,417 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:46:06,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06 WrapperNode [2020-12-22 09:46:06,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:46:06,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:46:06,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:46:06,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:46:06,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:06,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:06,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:46:06,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:46:06,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:46:06,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:46:06,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:06,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:06,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:06,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:07,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:07,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:07,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (1/1) ... [2020-12-22 09:46:07,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:46:07,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:46:07,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:46:07,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:46:07,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (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 09:46:07,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:46:07,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:46:07,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:46:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:46:13,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:46:13,525 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:46:13,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:46:13 BoogieIcfgContainer [2020-12-22 09:46:13,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:46:13,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:46:13,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:46:13,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:46:13,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:46:03" (1/3) ... [2020-12-22 09:46:13,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ddc7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:46:13, skipping insertion in model container [2020-12-22 09:46:13,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:06" (2/3) ... [2020-12-22 09:46:13,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ddc7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:46:13, skipping insertion in model container [2020-12-22 09:46:13,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:46:13" (3/3) ... [2020-12-22 09:46:13,540 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:46:13,549 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:46:13,557 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:46:13,581 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:46:13,621 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:46:13,622 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:46:13,622 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:46:13,622 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:46:13,622 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:46:13,622 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:46:13,622 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:46:13,623 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:46:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:46:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 09:46:13,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:13,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:13,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 865953301, now seen corresponding path program 1 times [2020-12-22 09:46:13,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:13,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647534357] [2020-12-22 09:46:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:14,088 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 09:46:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647534357] [2020-12-22 09:46:14,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:14,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:46:14,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508336999] [2020-12-22 09:46:14,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:14,126 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 3 states. [2020-12-22 09:46:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:20,745 INFO L93 Difference]: Finished difference Result 2512 states and 4836 transitions. [2020-12-22 09:46:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:20,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 09:46:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:20,795 INFO L225 Difference]: With dead ends: 2512 [2020-12-22 09:46:20,795 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:46:20,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:46:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:46:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:46:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:46:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2901 transitions. [2020-12-22 09:46:20,952 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2901 transitions. Word has length 16 [2020-12-22 09:46:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:20,952 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2901 transitions. [2020-12-22 09:46:20,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2901 transitions. [2020-12-22 09:46:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:46:20,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:20,955 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] [2020-12-22 09:46:20,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:46:20,956 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:46:20,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:20,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734139886] [2020-12-22 09:46:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:21,107 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 09:46:21,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734139886] [2020-12-22 09:46:21,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:21,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:21,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358331801] [2020-12-22 09:46:21,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:46:21,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:46:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:46:21,117 INFO L87 Difference]: Start difference. First operand 1579 states and 2901 transitions. Second operand 5 states. [2020-12-22 09:46:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:21,229 INFO L93 Difference]: Finished difference Result 1628 states and 2976 transitions. [2020-12-22 09:46:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:46:21,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:46:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:21,240 INFO L225 Difference]: With dead ends: 1628 [2020-12-22 09:46:21,241 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:46:21,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:46:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:46:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:46:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:46:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2878 transitions. [2020-12-22 09:46:21,360 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2878 transitions. Word has length 30 [2020-12-22 09:46:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:21,361 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2878 transitions. [2020-12-22 09:46:21,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:46:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2878 transitions. [2020-12-22 09:46:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:21,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:21,367 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] [2020-12-22 09:46:21,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:46:21,368 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:46:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:21,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314343022] [2020-12-22 09:46:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:21,516 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 09:46:21,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314343022] [2020-12-22 09:46:21,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:21,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:21,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62876753] [2020-12-22 09:46:21,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:21,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:21,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:21,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:21,520 INFO L87 Difference]: Start difference. First operand 1579 states and 2878 transitions. Second operand 6 states. [2020-12-22 09:46:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:21,729 INFO L93 Difference]: Finished difference Result 1939 states and 3446 transitions. [2020-12-22 09:46:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:46:21,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:46:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:21,742 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 09:46:21,743 INFO L226 Difference]: Without dead ends: 1894 [2020-12-22 09:46:21,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:46:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-12-22 09:46:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1622. [2020-12-22 09:46:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2020-12-22 09:46:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2946 transitions. [2020-12-22 09:46:21,797 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2946 transitions. Word has length 52 [2020-12-22 09:46:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:21,797 INFO L481 AbstractCegarLoop]: Abstraction has 1622 states and 2946 transitions. [2020-12-22 09:46:21,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:21,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2946 transitions. [2020-12-22 09:46:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:21,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:21,800 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] [2020-12-22 09:46:21,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:46:21,800 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:46:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:21,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566537486] [2020-12-22 09:46:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:21,966 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 09:46:21,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566537486] [2020-12-22 09:46:21,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:21,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577918120] [2020-12-22 09:46:21,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:21,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:21,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:21,970 INFO L87 Difference]: Start difference. First operand 1622 states and 2946 transitions. Second operand 3 states. [2020-12-22 09:46:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:22,031 INFO L93 Difference]: Finished difference Result 1787 states and 3205 transitions. [2020-12-22 09:46:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:22,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:46:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:22,043 INFO L225 Difference]: With dead ends: 1787 [2020-12-22 09:46:22,044 INFO L226 Difference]: Without dead ends: 1699 [2020-12-22 09:46:22,045 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 09:46:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-12-22 09:46:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1695. [2020-12-22 09:46:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:46:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 3058 transitions. [2020-12-22 09:46:22,098 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 3058 transitions. Word has length 54 [2020-12-22 09:46:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:22,099 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 3058 transitions. [2020-12-22 09:46:22,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 3058 transitions. [2020-12-22 09:46:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:22,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:22,101 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] [2020-12-22 09:46:22,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:46:22,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:22,102 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:46:22,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:22,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324697637] [2020-12-22 09:46:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:22,261 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 09:46:22,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324697637] [2020-12-22 09:46:22,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:22,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:22,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317862527] [2020-12-22 09:46:22,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:22,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:22,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:22,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:22,264 INFO L87 Difference]: Start difference. First operand 1695 states and 3058 transitions. Second operand 6 states. [2020-12-22 09:46:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:22,445 INFO L93 Difference]: Finished difference Result 1858 states and 3310 transitions. [2020-12-22 09:46:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:22,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:46:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:22,458 INFO L225 Difference]: With dead ends: 1858 [2020-12-22 09:46:22,458 INFO L226 Difference]: Without dead ends: 1697 [2020-12-22 09:46:22,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:46:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-12-22 09:46:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1695. [2020-12-22 09:46:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:46:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 3056 transitions. [2020-12-22 09:46:22,513 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 3056 transitions. Word has length 54 [2020-12-22 09:46:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:22,514 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 3056 transitions. [2020-12-22 09:46:22,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 3056 transitions. [2020-12-22 09:46:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:22,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:22,516 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] [2020-12-22 09:46:22,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:46:22,517 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:46:22,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:22,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2632381] [2020-12-22 09:46:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:22,614 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 09:46:22,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2632381] [2020-12-22 09:46:22,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:22,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:22,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088951790] [2020-12-22 09:46:22,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:22,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:22,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:22,619 INFO L87 Difference]: Start difference. First operand 1695 states and 3056 transitions. Second operand 3 states. [2020-12-22 09:46:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:22,680 INFO L93 Difference]: Finished difference Result 1993 states and 3514 transitions. [2020-12-22 09:46:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:22,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:46:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:22,694 INFO L225 Difference]: With dead ends: 1993 [2020-12-22 09:46:22,694 INFO L226 Difference]: Without dead ends: 1832 [2020-12-22 09:46:22,696 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 09:46:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-12-22 09:46:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1830. [2020-12-22 09:46:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2020-12-22 09:46:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3260 transitions. [2020-12-22 09:46:22,758 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3260 transitions. Word has length 54 [2020-12-22 09:46:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:22,758 INFO L481 AbstractCegarLoop]: Abstraction has 1830 states and 3260 transitions. [2020-12-22 09:46:22,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3260 transitions. [2020-12-22 09:46:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:22,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:22,761 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] [2020-12-22 09:46:22,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:46:22,762 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:46:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221724742] [2020-12-22 09:46:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:22,865 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 09:46:22,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221724742] [2020-12-22 09:46:22,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:22,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193581008] [2020-12-22 09:46:22,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:22,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:22,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:22,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:22,875 INFO L87 Difference]: Start difference. First operand 1830 states and 3260 transitions. Second operand 3 states. [2020-12-22 09:46:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:22,963 INFO L93 Difference]: Finished difference Result 2374 states and 4086 transitions. [2020-12-22 09:46:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:22,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:46:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:22,983 INFO L225 Difference]: With dead ends: 2374 [2020-12-22 09:46:22,983 INFO L226 Difference]: Without dead ends: 2078 [2020-12-22 09:46:22,986 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 09:46:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-12-22 09:46:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2076. [2020-12-22 09:46:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-12-22 09:46:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3624 transitions. [2020-12-22 09:46:23,087 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3624 transitions. Word has length 54 [2020-12-22 09:46:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:23,088 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 3624 transitions. [2020-12-22 09:46:23,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3624 transitions. [2020-12-22 09:46:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:23,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:23,090 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] [2020-12-22 09:46:23,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:46:23,090 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:46:23,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:23,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833526926] [2020-12-22 09:46:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:23,150 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 09:46:23,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833526926] [2020-12-22 09:46:23,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:23,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822323714] [2020-12-22 09:46:23,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:23,152 INFO L87 Difference]: Start difference. First operand 2076 states and 3624 transitions. Second operand 3 states. [2020-12-22 09:46:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:23,249 INFO L93 Difference]: Finished difference Result 3064 states and 5098 transitions. [2020-12-22 09:46:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:23,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:46:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:23,265 INFO L225 Difference]: With dead ends: 3064 [2020-12-22 09:46:23,266 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:46:23,268 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 09:46:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:46:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2020-12-22 09:46:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2020-12-22 09:46:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 4264 transitions. [2020-12-22 09:46:23,382 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 4264 transitions. Word has length 54 [2020-12-22 09:46:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:23,384 INFO L481 AbstractCegarLoop]: Abstraction has 2520 states and 4264 transitions. [2020-12-22 09:46:23,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 4264 transitions. [2020-12-22 09:46:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:46:23,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:23,385 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] [2020-12-22 09:46:23,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:46:23,385 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:46:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:23,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613996981] [2020-12-22 09:46:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:23,504 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 09:46:23,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613996981] [2020-12-22 09:46:23,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:23,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:23,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930818531] [2020-12-22 09:46:23,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:46:23,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:46:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:46:23,508 INFO L87 Difference]: Start difference. First operand 2520 states and 4264 transitions. Second operand 5 states. [2020-12-22 09:46:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:23,718 INFO L93 Difference]: Finished difference Result 3274 states and 5349 transitions. [2020-12-22 09:46:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:46:23,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:46:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:23,738 INFO L225 Difference]: With dead ends: 3274 [2020-12-22 09:46:23,738 INFO L226 Difference]: Without dead ends: 3272 [2020-12-22 09:46:23,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:46:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2020-12-22 09:46:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2568. [2020-12-22 09:46:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-12-22 09:46:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 4304 transitions. [2020-12-22 09:46:23,887 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 4304 transitions. Word has length 55 [2020-12-22 09:46:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:23,887 INFO L481 AbstractCegarLoop]: Abstraction has 2568 states and 4304 transitions. [2020-12-22 09:46:23,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:46:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 4304 transitions. [2020-12-22 09:46:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:46:23,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:23,889 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] [2020-12-22 09:46:23,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:46:23,889 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:46:23,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:23,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638886766] [2020-12-22 09:46:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:23,948 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 09:46:23,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638886766] [2020-12-22 09:46:23,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:23,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:23,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844933204] [2020-12-22 09:46:23,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:23,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:23,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:23,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:23,953 INFO L87 Difference]: Start difference. First operand 2568 states and 4304 transitions. Second operand 3 states. [2020-12-22 09:46:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:24,103 INFO L93 Difference]: Finished difference Result 3631 states and 5862 transitions. [2020-12-22 09:46:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:24,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:46:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:24,121 INFO L225 Difference]: With dead ends: 3631 [2020-12-22 09:46:24,121 INFO L226 Difference]: Without dead ends: 3036 [2020-12-22 09:46:24,124 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 09:46:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-12-22 09:46:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3034. [2020-12-22 09:46:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:46:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4962 transitions. [2020-12-22 09:46:24,295 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4962 transitions. Word has length 56 [2020-12-22 09:46:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:24,295 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4962 transitions. [2020-12-22 09:46:24,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4962 transitions. [2020-12-22 09:46:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:46:24,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:24,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:24,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:46:24,298 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:46:24,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:24,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82444537] [2020-12-22 09:46:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:46:24,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82444537] [2020-12-22 09:46:24,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:24,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:24,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096725644] [2020-12-22 09:46:24,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:24,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:24,431 INFO L87 Difference]: Start difference. First operand 3034 states and 4962 transitions. Second operand 6 states. [2020-12-22 09:46:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:25,132 INFO L93 Difference]: Finished difference Result 9340 states and 14003 transitions. [2020-12-22 09:46:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:25,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:46:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:25,188 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:46:25,189 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:46:25,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:46:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:46:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:46:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 7090 transitions. [2020-12-22 09:46:25,530 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 7090 transitions. Word has length 78 [2020-12-22 09:46:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:25,531 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 7090 transitions. [2020-12-22 09:46:25,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 7090 transitions. [2020-12-22 09:46:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:46:25,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:25,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:25,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:46:25,543 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:25,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:46:25,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:25,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431390644] [2020-12-22 09:46:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:46:25,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431390644] [2020-12-22 09:46:25,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:25,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:25,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715066068] [2020-12-22 09:46:25,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:25,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:25,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:25,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:25,673 INFO L87 Difference]: Start difference. First operand 4530 states and 7090 transitions. Second operand 6 states. [2020-12-22 09:46:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:26,456 INFO L93 Difference]: Finished difference Result 10836 states and 16131 transitions. [2020-12-22 09:46:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:26,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:46:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:26,484 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:46:26,484 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:46:26,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:46:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:46:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:46:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 10262 transitions. [2020-12-22 09:46:27,156 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 10262 transitions. Word has length 78 [2020-12-22 09:46:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:27,156 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 10262 transitions. [2020-12-22 09:46:27,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 10262 transitions. [2020-12-22 09:46:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:46:27,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:27,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:27,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:46:27,161 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:46:27,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:27,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735636432] [2020-12-22 09:46:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:46:27,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735636432] [2020-12-22 09:46:27,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:27,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:27,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340819534] [2020-12-22 09:46:27,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:27,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:27,324 INFO L87 Difference]: Start difference. First operand 6778 states and 10262 transitions. Second operand 6 states. [2020-12-22 09:46:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:28,276 INFO L93 Difference]: Finished difference Result 12332 states and 18259 transitions. [2020-12-22 09:46:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:28,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:46:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:28,308 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:46:28,309 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:46:28,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:46:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:46:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:46:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12390 transitions. [2020-12-22 09:46:29,088 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12390 transitions. Word has length 78 [2020-12-22 09:46:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:29,088 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12390 transitions. [2020-12-22 09:46:29,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12390 transitions. [2020-12-22 09:46:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:46:29,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:29,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:29,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:46:29,093 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:29,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:46:29,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:29,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283035779] [2020-12-22 09:46:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:29,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283035779] [2020-12-22 09:46:29,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:29,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:29,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635171680] [2020-12-22 09:46:29,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:29,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:29,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:29,173 INFO L87 Difference]: Start difference. First operand 8274 states and 12390 transitions. Second operand 3 states. [2020-12-22 09:46:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:29,542 INFO L93 Difference]: Finished difference Result 13055 states and 19262 transitions. [2020-12-22 09:46:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:29,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:46:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:29,561 INFO L225 Difference]: With dead ends: 13055 [2020-12-22 09:46:29,561 INFO L226 Difference]: Without dead ends: 6317 [2020-12-22 09:46:29,573 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 09:46:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2020-12-22 09:46:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6315. [2020-12-22 09:46:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6315 states. [2020-12-22 09:46:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 9607 transitions. [2020-12-22 09:46:30,059 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 9607 transitions. Word has length 80 [2020-12-22 09:46:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:30,059 INFO L481 AbstractCegarLoop]: Abstraction has 6315 states and 9607 transitions. [2020-12-22 09:46:30,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 9607 transitions. [2020-12-22 09:46:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:46:30,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:30,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:30,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:46:30,065 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:46:30,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:30,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131366548] [2020-12-22 09:46:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:46:30,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131366548] [2020-12-22 09:46:30,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:30,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:30,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479467936] [2020-12-22 09:46:30,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:30,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:30,215 INFO L87 Difference]: Start difference. First operand 6315 states and 9607 transitions. Second operand 6 states. [2020-12-22 09:46:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:31,000 INFO L93 Difference]: Finished difference Result 10549 states and 15692 transitions. [2020-12-22 09:46:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:31,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:46:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:31,032 INFO L225 Difference]: With dead ends: 10549 [2020-12-22 09:46:31,032 INFO L226 Difference]: Without dead ends: 9491 [2020-12-22 09:46:31,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2020-12-22 09:46:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7371. [2020-12-22 09:46:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7371 states. [2020-12-22 09:46:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7371 states to 7371 states and 11111 transitions. [2020-12-22 09:46:31,610 INFO L78 Accepts]: Start accepts. Automaton has 7371 states and 11111 transitions. Word has length 80 [2020-12-22 09:46:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:31,610 INFO L481 AbstractCegarLoop]: Abstraction has 7371 states and 11111 transitions. [2020-12-22 09:46:31,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7371 states and 11111 transitions. [2020-12-22 09:46:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:31,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:31,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:31,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:46:31,614 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:46:31,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:31,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796563493] [2020-12-22 09:46:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:31,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796563493] [2020-12-22 09:46:31,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:31,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:31,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158083024] [2020-12-22 09:46:31,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:31,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:31,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:31,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:31,722 INFO L87 Difference]: Start difference. First operand 7371 states and 11111 transitions. Second operand 3 states. [2020-12-22 09:46:32,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:32,063 INFO L93 Difference]: Finished difference Result 10279 states and 15249 transitions. [2020-12-22 09:46:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:32,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:32,075 INFO L225 Difference]: With dead ends: 10279 [2020-12-22 09:46:32,075 INFO L226 Difference]: Without dead ends: 4469 [2020-12-22 09:46:32,084 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 09:46:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2020-12-22 09:46:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4467. [2020-12-22 09:46:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-12-22 09:46:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6931 transitions. [2020-12-22 09:46:32,334 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6931 transitions. Word has length 81 [2020-12-22 09:46:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:32,334 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6931 transitions. [2020-12-22 09:46:32,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6931 transitions. [2020-12-22 09:46:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:32,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:32,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:32,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:46:32,338 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:46:32,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:32,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762436375] [2020-12-22 09:46:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:32,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762436375] [2020-12-22 09:46:32,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:32,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137449323] [2020-12-22 09:46:32,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:32,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:32,427 INFO L87 Difference]: Start difference. First operand 4467 states and 6931 transitions. Second operand 3 states. [2020-12-22 09:46:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:32,591 INFO L93 Difference]: Finished difference Result 5923 states and 8979 transitions. [2020-12-22 09:46:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:32,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:32,601 INFO L225 Difference]: With dead ends: 5923 [2020-12-22 09:46:32,601 INFO L226 Difference]: Without dead ends: 3017 [2020-12-22 09:46:32,607 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 09:46:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2020-12-22 09:46:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 3015. [2020-12-22 09:46:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2020-12-22 09:46:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4863 transitions. [2020-12-22 09:46:32,773 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4863 transitions. Word has length 81 [2020-12-22 09:46:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:32,773 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4863 transitions. [2020-12-22 09:46:32,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4863 transitions. [2020-12-22 09:46:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:32,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:32,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:32,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:46:32,776 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:46:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:32,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178324087] [2020-12-22 09:46:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:32,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178324087] [2020-12-22 09:46:32,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:32,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:32,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091288315] [2020-12-22 09:46:32,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:32,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:32,859 INFO L87 Difference]: Start difference. First operand 3015 states and 4863 transitions. Second operand 3 states. [2020-12-22 09:46:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:32,965 INFO L93 Difference]: Finished difference Result 3745 states and 5877 transitions. [2020-12-22 09:46:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:32,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:32,972 INFO L225 Difference]: With dead ends: 3745 [2020-12-22 09:46:32,973 INFO L226 Difference]: Without dead ends: 2291 [2020-12-22 09:46:32,978 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 09:46:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-12-22 09:46:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2289. [2020-12-22 09:46:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 09:46:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3840 transitions. [2020-12-22 09:46:33,070 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3840 transitions. Word has length 81 [2020-12-22 09:46:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:33,071 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 3840 transitions. [2020-12-22 09:46:33,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3840 transitions. [2020-12-22 09:46:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:33,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:33,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:33,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:46:33,073 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:33,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:46:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:33,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806830317] [2020-12-22 09:46:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:33,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806830317] [2020-12-22 09:46:33,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24725792] [2020-12-22 09:46:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:33,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:46:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:46:33,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:33,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:46:33,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921906070] [2020-12-22 09:46:33,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:46:33,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:33,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:46:33,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:46:33,883 INFO L87 Difference]: Start difference. First operand 2289 states and 3840 transitions. Second operand 12 states. [2020-12-22 09:46:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:35,843 INFO L93 Difference]: Finished difference Result 5722 states and 8489 transitions. [2020-12-22 09:46:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:46:35,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:46:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:35,857 INFO L225 Difference]: With dead ends: 5722 [2020-12-22 09:46:35,858 INFO L226 Difference]: Without dead ends: 4994 [2020-12-22 09:46:35,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:46:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2020-12-22 09:46:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4081. [2020-12-22 09:46:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4081 states. [2020-12-22 09:46:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 6129 transitions. [2020-12-22 09:46:36,255 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 6129 transitions. Word has length 81 [2020-12-22 09:46:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:36,256 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 6129 transitions. [2020-12-22 09:46:36,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:46:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 6129 transitions. [2020-12-22 09:46:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:46:36,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:36,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:36,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:36,472 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:46:36,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:36,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089853402] [2020-12-22 09:46:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089853402] [2020-12-22 09:46:36,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244431169] [2020-12-22 09:46:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:36,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:46:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:37,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:37,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:37,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:46:37,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699511970] [2020-12-22 09:46:37,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:46:37,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:46:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:46:37,794 INFO L87 Difference]: Start difference. First operand 4081 states and 6129 transitions. Second operand 17 states. [2020-12-22 09:46:37,937 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:46:38,202 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:40,265 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:46:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:41,742 INFO L93 Difference]: Finished difference Result 14199 states and 19285 transitions. [2020-12-22 09:46:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:46:41,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:46:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:41,775 INFO L225 Difference]: With dead ends: 14199 [2020-12-22 09:46:41,775 INFO L226 Difference]: Without dead ends: 11892 [2020-12-22 09:46:41,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:46:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2020-12-22 09:46:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 8112. [2020-12-22 09:46:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8112 states. [2020-12-22 09:46:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 11311 transitions. [2020-12-22 09:46:42,842 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 11311 transitions. Word has length 82 [2020-12-22 09:46:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:42,843 INFO L481 AbstractCegarLoop]: Abstraction has 8112 states and 11311 transitions. [2020-12-22 09:46:42,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:46:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 11311 transitions. [2020-12-22 09:46:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:46:42,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:42,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:43,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:43,060 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:46:43,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:43,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448107319] [2020-12-22 09:46:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:43,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448107319] [2020-12-22 09:46:43,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383878501] [2020-12-22 09:46:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:43,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:46:43,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:43,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:44,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:44,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:46:44,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665007126] [2020-12-22 09:46:44,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:46:44,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:44,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:46:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:46:44,005 INFO L87 Difference]: Start difference. First operand 8112 states and 11311 transitions. Second operand 17 states. [2020-12-22 09:46:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:48,520 INFO L93 Difference]: Finished difference Result 32062 states and 42534 transitions. [2020-12-22 09:46:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:46:48,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:46:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:48,589 INFO L225 Difference]: With dead ends: 32062 [2020-12-22 09:46:48,589 INFO L226 Difference]: Without dead ends: 26546 [2020-12-22 09:46:48,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:46:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2020-12-22 09:46:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 18920. [2020-12-22 09:46:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18920 states. [2020-12-22 09:46:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18920 states to 18920 states and 25045 transitions. [2020-12-22 09:46:50,582 INFO L78 Accepts]: Start accepts. Automaton has 18920 states and 25045 transitions. Word has length 82 [2020-12-22 09:46:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:50,582 INFO L481 AbstractCegarLoop]: Abstraction has 18920 states and 25045 transitions. [2020-12-22 09:46:50,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:46:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 18920 states and 25045 transitions. [2020-12-22 09:46:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:46:50,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:50,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:50,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:50,800 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:46:50,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:50,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619090084] [2020-12-22 09:46:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:46:50,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619090084] [2020-12-22 09:46:50,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:50,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:50,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911947501] [2020-12-22 09:46:50,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:50,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:50,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:50,927 INFO L87 Difference]: Start difference. First operand 18920 states and 25045 transitions. Second operand 6 states. [2020-12-22 09:46:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:52,501 INFO L93 Difference]: Finished difference Result 33364 states and 43645 transitions. [2020-12-22 09:46:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:52,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:46:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:52,547 INFO L225 Difference]: With dead ends: 33364 [2020-12-22 09:46:52,548 INFO L226 Difference]: Without dead ends: 16077 [2020-12-22 09:46:52,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16077 states. [2020-12-22 09:46:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16077 to 16077. [2020-12-22 09:46:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16077 states. [2020-12-22 09:46:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16077 states to 16077 states and 21161 transitions. [2020-12-22 09:46:54,201 INFO L78 Accepts]: Start accepts. Automaton has 16077 states and 21161 transitions. Word has length 82 [2020-12-22 09:46:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:54,201 INFO L481 AbstractCegarLoop]: Abstraction has 16077 states and 21161 transitions. [2020-12-22 09:46:54,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 16077 states and 21161 transitions. [2020-12-22 09:46:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:46:54,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:54,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:54,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:46:54,204 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:46:54,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:54,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346175062] [2020-12-22 09:46:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:46:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346175062] [2020-12-22 09:46:54,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:54,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:54,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541525250] [2020-12-22 09:46:54,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:54,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:54,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:54,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:54,283 INFO L87 Difference]: Start difference. First operand 16077 states and 21161 transitions. Second operand 6 states. [2020-12-22 09:46:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:55,448 INFO L93 Difference]: Finished difference Result 26822 states and 34826 transitions. [2020-12-22 09:46:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:55,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:46:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:55,480 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 09:46:55,480 INFO L226 Difference]: Without dead ends: 12404 [2020-12-22 09:46:55,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2020-12-22 09:46:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 12404. [2020-12-22 09:46:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12404 states. [2020-12-22 09:46:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12404 states to 12404 states and 16383 transitions. [2020-12-22 09:46:56,606 INFO L78 Accepts]: Start accepts. Automaton has 12404 states and 16383 transitions. Word has length 82 [2020-12-22 09:46:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:56,607 INFO L481 AbstractCegarLoop]: Abstraction has 12404 states and 16383 transitions. [2020-12-22 09:46:56,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 12404 states and 16383 transitions. [2020-12-22 09:46:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:46:56,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:56,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:56,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:46:56,610 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:56,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:56,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:46:56,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:56,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009843045] [2020-12-22 09:46:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:46:56,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009843045] [2020-12-22 09:46:56,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:56,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:56,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943762666] [2020-12-22 09:46:56,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:56,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:56,691 INFO L87 Difference]: Start difference. First operand 12404 states and 16383 transitions. Second operand 6 states. [2020-12-22 09:46:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:58,443 INFO L93 Difference]: Finished difference Result 20759 states and 26944 transitions. [2020-12-22 09:46:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:58,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:46:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:58,467 INFO L225 Difference]: With dead ends: 20759 [2020-12-22 09:46:58,467 INFO L226 Difference]: Without dead ends: 9932 [2020-12-22 09:46:58,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9932 states. [2020-12-22 09:46:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9932 to 9932. [2020-12-22 09:46:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9932 states. [2020-12-22 09:46:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 13264 transitions. [2020-12-22 09:46:59,579 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 13264 transitions. Word has length 82 [2020-12-22 09:46:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:59,579 INFO L481 AbstractCegarLoop]: Abstraction has 9932 states and 13264 transitions. [2020-12-22 09:46:59,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 13264 transitions. [2020-12-22 09:46:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:46:59,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:59,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:59,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:46:59,582 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:46:59,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:59,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905072071] [2020-12-22 09:46:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:59,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905072071] [2020-12-22 09:46:59,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130101436] [2020-12-22 09:46:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:00,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:47:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:00,317 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:47:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:00,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:00,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:47:00,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127897586] [2020-12-22 09:47:00,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:47:00,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:47:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:47:00,693 INFO L87 Difference]: Start difference. First operand 9932 states and 13264 transitions. Second operand 17 states. [2020-12-22 09:47:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:06,331 INFO L93 Difference]: Finished difference Result 42734 states and 53704 transitions. [2020-12-22 09:47:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:47:06,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:47:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:06,371 INFO L225 Difference]: With dead ends: 42734 [2020-12-22 09:47:06,371 INFO L226 Difference]: Without dead ends: 35713 [2020-12-22 09:47:06,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:47:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35713 states. [2020-12-22 09:47:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35713 to 22851. [2020-12-22 09:47:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22851 states. [2020-12-22 09:47:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22851 states to 22851 states and 29313 transitions. [2020-12-22 09:47:08,860 INFO L78 Accepts]: Start accepts. Automaton has 22851 states and 29313 transitions. Word has length 83 [2020-12-22 09:47:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:08,861 INFO L481 AbstractCegarLoop]: Abstraction has 22851 states and 29313 transitions. [2020-12-22 09:47:08,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:47:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 22851 states and 29313 transitions. [2020-12-22 09:47:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:08,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:08,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:47:09,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:09,064 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:47:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:09,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36203306] [2020-12-22 09:47:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:47:09,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36203306] [2020-12-22 09:47:09,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:09,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:09,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156986060] [2020-12-22 09:47:09,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:09,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:09,155 INFO L87 Difference]: Start difference. First operand 22851 states and 29313 transitions. Second operand 6 states. [2020-12-22 09:47:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:11,754 INFO L93 Difference]: Finished difference Result 38944 states and 49269 transitions. [2020-12-22 09:47:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:11,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:47:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:11,778 INFO L225 Difference]: With dead ends: 38944 [2020-12-22 09:47:11,779 INFO L226 Difference]: Without dead ends: 17826 [2020-12-22 09:47:11,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2020-12-22 09:47:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 17826. [2020-12-22 09:47:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17826 states. [2020-12-22 09:47:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17826 states to 17826 states and 22710 transitions. [2020-12-22 09:47:14,258 INFO L78 Accepts]: Start accepts. Automaton has 17826 states and 22710 transitions. Word has length 83 [2020-12-22 09:47:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:14,258 INFO L481 AbstractCegarLoop]: Abstraction has 17826 states and 22710 transitions. [2020-12-22 09:47:14,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 17826 states and 22710 transitions. [2020-12-22 09:47:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:47:14,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:14,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:47:14,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:47:14,261 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:47:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:14,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232454116] [2020-12-22 09:47:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:16,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232454116] [2020-12-22 09:47:16,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241926380] [2020-12-22 09:47:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:16,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:47:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:17,186 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:18,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:18,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:47:18,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305261188] [2020-12-22 09:47:18,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:47:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:47:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:47:18,157 INFO L87 Difference]: Start difference. First operand 17826 states and 22710 transitions. Second operand 40 states. [2020-12-22 09:47:18,663 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:47:19,846 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 09:47:20,160 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-22 09:47:20,505 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:47:20,771 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:47:21,116 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:47:21,509 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:47:22,019 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:47:22,495 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:47:23,146 WARN L197 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:47:23,790 WARN L197 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:47:24,216 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:47:24,655 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:47:24,986 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:47:25,386 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:47:25,717 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:47:26,235 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:47:26,583 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:47:26,876 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:47:27,244 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:47:27,563 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:47:28,192 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:47:28,826 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:47:29,035 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:47:29,317 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:29,531 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:47:30,348 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:47:30,674 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:47:31,003 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:31,485 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:47:32,106 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:47:32,373 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:47:32,602 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:47:33,130 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:33,420 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:47:34,272 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:47:34,784 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:47:35,076 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:47:35,277 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:47:35,596 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:47:36,397 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:47:37,653 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:47:37,997 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:47:38,239 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:47:38,773 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:47:39,057 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:47:39,427 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:47:39,674 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:47:39,917 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:47:40,097 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:47:40,303 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:40,505 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:47:40,836 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:47:41,061 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:47:41,637 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:47:41,964 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:47:42,469 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:47:42,757 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:47:43,082 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:43,370 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:47:43,622 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:47:43,793 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:47:44,312 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:47:44,536 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:47:44,888 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:47:45,789 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:47:46,021 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:47:48,960 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 09:47:49,350 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:47:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:50,410 INFO L93 Difference]: Finished difference Result 30408 states and 38540 transitions. [2020-12-22 09:47:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:47:50,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:47:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:50,435 INFO L225 Difference]: With dead ends: 30408 [2020-12-22 09:47:50,435 INFO L226 Difference]: Without dead ends: 24257 [2020-12-22 09:47:50,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:47:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2020-12-22 09:47:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 16024. [2020-12-22 09:47:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16024 states. [2020-12-22 09:47:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16024 states to 16024 states and 20571 transitions. [2020-12-22 09:47:52,407 INFO L78 Accepts]: Start accepts. Automaton has 16024 states and 20571 transitions. Word has length 84 [2020-12-22 09:47:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:52,407 INFO L481 AbstractCegarLoop]: Abstraction has 16024 states and 20571 transitions. [2020-12-22 09:47:52,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:47:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 16024 states and 20571 transitions. [2020-12-22 09:47:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:47:52,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:52,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:47:52,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:47:52,623 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:47:52,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:52,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76957713] [2020-12-22 09:47:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:52,997 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:47:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:53,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76957713] [2020-12-22 09:47:53,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025432019] [2020-12-22 09:47:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:53,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:47:53,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:53,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:54,182 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:47:54,610 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:47:54,844 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:47:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:54,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:54,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:47:54,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334706523] [2020-12-22 09:47:54,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:47:54,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:47:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:47:54,909 INFO L87 Difference]: Start difference. First operand 16024 states and 20571 transitions. Second operand 23 states. [2020-12-22 09:47:55,081 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:47:55,679 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:47:55,892 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:47:56,121 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:47:56,552 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:47:56,806 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:47:57,118 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:47:57,583 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:47:58,059 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:47:58,571 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:47:58,940 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:47:59,371 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:47:59,736 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:48:00,208 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:48:00,407 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:48:00,715 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:48:00,981 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:48:01,397 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:48:01,647 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:48:01,964 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:48:02,205 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:48:02,773 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:48:03,676 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:48:03,988 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:48:04,275 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:48:04,597 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:48:05,177 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:48:05,575 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:48:06,156 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:48:06,467 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:48:06,685 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:48:07,202 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 09:48:07,425 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:48:07,776 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:48:08,079 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:48:08,289 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:48:08,648 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:48:09,037 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:48:09,267 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:48:09,545 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:48:09,911 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:48:10,214 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:48:10,804 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:48:11,000 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:48:11,250 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:48:11,973 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:48:12,332 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:48:12,965 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:48:13,409 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:48:13,972 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:48:14,495 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:14,696 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:15,085 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:48:15,378 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:48:15,737 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:48:17,377 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:48:17,992 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:48:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:19,635 INFO L93 Difference]: Finished difference Result 30140 states and 38696 transitions. [2020-12-22 09:48:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:48:19,635 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:48:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:19,655 INFO L225 Difference]: With dead ends: 30140 [2020-12-22 09:48:19,655 INFO L226 Difference]: Without dead ends: 21459 [2020-12-22 09:48:19,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:48:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21459 states. [2020-12-22 09:48:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21459 to 11771. [2020-12-22 09:48:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11771 states. [2020-12-22 09:48:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11771 states to 11771 states and 15429 transitions. [2020-12-22 09:48:21,245 INFO L78 Accepts]: Start accepts. Automaton has 11771 states and 15429 transitions. Word has length 84 [2020-12-22 09:48:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:21,245 INFO L481 AbstractCegarLoop]: Abstraction has 11771 states and 15429 transitions. [2020-12-22 09:48:21,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:48:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 11771 states and 15429 transitions. [2020-12-22 09:48:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 09:48:21,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:21,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:48:21,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:48:21,462 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:21,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1070358934, now seen corresponding path program 1 times [2020-12-22 09:48:21,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:21,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654819390] [2020-12-22 09:48:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654819390] [2020-12-22 09:48:21,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:21,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:21,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739747452] [2020-12-22 09:48:21,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:21,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:21,529 INFO L87 Difference]: Start difference. First operand 11771 states and 15429 transitions. Second operand 3 states. [2020-12-22 09:48:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:32,439 INFO L93 Difference]: Finished difference Result 14779 states and 20981 transitions. [2020-12-22 09:48:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:32,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 09:48:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:32,456 INFO L225 Difference]: With dead ends: 14779 [2020-12-22 09:48:32,456 INFO L226 Difference]: Without dead ends: 13275 [2020-12-22 09:48:32,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:48:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13275 states. [2020-12-22 09:48:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13275 to 13273. [2020-12-22 09:48:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13273 states. [2020-12-22 09:48:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 17352 transitions. [2020-12-22 09:48:34,006 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 17352 transitions. Word has length 85 [2020-12-22 09:48:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:34,006 INFO L481 AbstractCegarLoop]: Abstraction has 13273 states and 17352 transitions. [2020-12-22 09:48:34,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 17352 transitions. [2020-12-22 09:48:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:48:34,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:34,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:48:34,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 09:48:34,008 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:48:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:34,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972634777] [2020-12-22 09:48:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:34,557 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:48:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:34,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972634777] [2020-12-22 09:48:34,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340978874] [2020-12-22 09:48:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:48:35,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:35,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:35,922 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:48:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:36,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:36,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:48:36,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296508534] [2020-12-22 09:48:36,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:48:36,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:36,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:48:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:48:36,533 INFO L87 Difference]: Start difference. First operand 13273 states and 17352 transitions. Second operand 24 states. [2020-12-22 09:48:37,282 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:48:37,624 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:48:38,043 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:48:38,343 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:48:38,597 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 09:48:38,932 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:48:39,420 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:48:40,048 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:48:40,775 WARN L197 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:48:41,055 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:48:41,547 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:48:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,852 INFO L93 Difference]: Finished difference Result 20103 states and 25612 transitions. [2020-12-22 09:48:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:48:43,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:48:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,870 INFO L225 Difference]: With dead ends: 20103 [2020-12-22 09:48:43,870 INFO L226 Difference]: Without dead ends: 15208 [2020-12-22 09:48:43,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:48:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15208 states. [2020-12-22 09:48:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15208 to 11181. [2020-12-22 09:48:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11181 states. [2020-12-22 09:48:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 14821 transitions. [2020-12-22 09:48:45,133 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 14821 transitions. Word has length 86 [2020-12-22 09:48:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:45,133 INFO L481 AbstractCegarLoop]: Abstraction has 11181 states and 14821 transitions. [2020-12-22 09:48:45,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:48:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 14821 transitions. [2020-12-22 09:48:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 09:48:45,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:45,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:48:45,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:45,350 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1858355461, now seen corresponding path program 1 times [2020-12-22 09:48:45,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:45,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164745681] [2020-12-22 09:48:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164745681] [2020-12-22 09:48:45,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:45,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:45,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582292603] [2020-12-22 09:48:45,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:45,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:45,411 INFO L87 Difference]: Start difference. First operand 11181 states and 14821 transitions. Second operand 3 states. [2020-12-22 09:48:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:57,591 INFO L93 Difference]: Finished difference Result 17191 states and 24218 transitions. [2020-12-22 09:48:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:57,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 09:48:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:57,608 INFO L225 Difference]: With dead ends: 17191 [2020-12-22 09:48:57,608 INFO L226 Difference]: Without dead ends: 14185 [2020-12-22 09:48:57,613 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 09:48:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2020-12-22 09:48:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 14185. [2020-12-22 09:48:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14185 states. [2020-12-22 09:48:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14185 states to 14185 states and 19043 transitions. [2020-12-22 09:48:58,948 INFO L78 Accepts]: Start accepts. Automaton has 14185 states and 19043 transitions. Word has length 87 [2020-12-22 09:48:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:58,949 INFO L481 AbstractCegarLoop]: Abstraction has 14185 states and 19043 transitions. [2020-12-22 09:48:58,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 14185 states and 19043 transitions. [2020-12-22 09:48:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 09:48:58,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:58,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:48:58,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:48:58,951 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -481288406, now seen corresponding path program 1 times [2020-12-22 09:48:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576211506] [2020-12-22 09:48:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:59,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576211506] [2020-12-22 09:48:59,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:59,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:59,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085211471] [2020-12-22 09:48:59,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:59,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:59,020 INFO L87 Difference]: Start difference. First operand 14185 states and 19043 transitions. Second operand 3 states. [2020-12-22 09:49:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:11,613 INFO L93 Difference]: Finished difference Result 26205 states and 36885 transitions. [2020-12-22 09:49:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:11,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 09:49:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:11,634 INFO L225 Difference]: With dead ends: 26205 [2020-12-22 09:49:11,635 INFO L226 Difference]: Without dead ends: 20195 [2020-12-22 09:49:11,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:49:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20195 states. [2020-12-22 09:49:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20195 to 18691. [2020-12-22 09:49:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18691 states. [2020-12-22 09:49:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18691 states to 18691 states and 24811 transitions. [2020-12-22 09:49:13,070 INFO L78 Accepts]: Start accepts. Automaton has 18691 states and 24811 transitions. Word has length 93 [2020-12-22 09:49:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,070 INFO L481 AbstractCegarLoop]: Abstraction has 18691 states and 24811 transitions. [2020-12-22 09:49:13,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18691 states and 24811 transitions. [2020-12-22 09:49:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 09:49:13,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:13,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 09:49:13,073 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash 365904045, now seen corresponding path program 1 times [2020-12-22 09:49:13,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339017257] [2020-12-22 09:49:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:13,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339017257] [2020-12-22 09:49:13,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:13,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795059050] [2020-12-22 09:49:13,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:49:13,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:49:13,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:49:13,229 INFO L87 Difference]: Start difference. First operand 18691 states and 24811 transitions. Second operand 4 states. [2020-12-22 09:49:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:32,645 INFO L93 Difference]: Finished difference Result 39721 states and 54187 transitions. [2020-12-22 09:49:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:49:32,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-12-22 09:49:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:32,678 INFO L225 Difference]: With dead ends: 39721 [2020-12-22 09:49:32,678 INFO L226 Difference]: Without dead ends: 29205 [2020-12-22 09:49:32,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:49:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29205 states. [2020-12-22 09:49:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29205 to 27703. [2020-12-22 09:49:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27703 states. [2020-12-22 09:49:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27703 states to 27703 states and 36318 transitions. [2020-12-22 09:49:34,131 INFO L78 Accepts]: Start accepts. Automaton has 27703 states and 36318 transitions. Word has length 114 [2020-12-22 09:49:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:34,131 INFO L481 AbstractCegarLoop]: Abstraction has 27703 states and 36318 transitions. [2020-12-22 09:49:34,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:49:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27703 states and 36318 transitions. [2020-12-22 09:49:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:49:34,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:34,135 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:34,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 09:49:34,136 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:49:34,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:34,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252097861] [2020-12-22 09:49:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:34,663 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:49:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:34,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252097861] [2020-12-22 09:49:34,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271653517] [2020-12-22 09:49:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:34,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:49:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:49:35,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:35,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:49:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359919350] [2020-12-22 09:49:35,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:49:35,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:49:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:49:35,845 INFO L87 Difference]: Start difference. First operand 27703 states and 36318 transitions. Second operand 15 states. [2020-12-22 09:49:36,036 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:49:36,416 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-12-22 09:49:36,721 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:49:37,056 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:49:37,276 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:37,731 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:38,102 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:38,537 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:49:38,778 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:39,029 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:39,375 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:39,606 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:49:39,854 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:40,792 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:41,492 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:49:41,776 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:42,066 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:42,540 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:49:42,805 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:49:43,026 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:49:43,692 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:49:44,479 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:49:44,727 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:49:44,974 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:49:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:45,553 INFO L93 Difference]: Finished difference Result 39584 states and 50984 transitions. [2020-12-22 09:49:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:49:45,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:49:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:45,588 INFO L225 Difference]: With dead ends: 39584 [2020-12-22 09:49:45,588 INFO L226 Difference]: Without dead ends: 32130 [2020-12-22 09:49:45,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:49:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32130 states.