/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.8.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:23:51,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:23:51,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:23:51,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:23:51,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:23:51,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:23:51,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:23:51,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:23:51,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:23:51,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:23:51,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:23:51,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:23:51,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:23:51,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:23:51,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:23:51,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:23:51,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:23:51,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:23:51,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:23:51,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:23:51,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:23:51,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:23:51,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:23:51,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:23:51,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:23:51,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:23:52,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:23:52,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:23:52,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:23:52,054 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:23:52,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:23:52,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:23:52,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:23:52,059 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:23:52,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:23:52,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:23:52,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:23:52,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:23:52,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:23:52,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:23:52,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:23:52,061 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:23:52,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:23:52,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:23:52,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:23:52,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:23:52,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:23:52,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:23:52,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:23:52,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:23:52,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:23:52,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:23:52,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:23:52,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:23:52,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:23:52,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:23:52,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:23:52,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:23:52,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:23:52,503 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:23:52,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:23:52,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1679372a5/6732eeec88da4bfeb96bd97022efc17e/FLAG153f1976b [2020-12-22 10:23:53,577 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:23:53,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:23:53,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1679372a5/6732eeec88da4bfeb96bd97022efc17e/FLAG153f1976b [2020-12-22 10:23:54,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1679372a5/6732eeec88da4bfeb96bd97022efc17e [2020-12-22 10:23:54,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:23:54,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:23:54,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:23:54,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:23:54,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:23:54,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:23:54" (1/1) ... [2020-12-22 10:23:54,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60cfab84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:54, skipping insertion in model container [2020-12-22 10:23:54,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:23:54" (1/1) ... [2020-12-22 10:23:54,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:23:54,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:23:54,682 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.8.ufo.UNBOUNDED.pals+Problem12_label02.c[26875,26888] [2020-12-22 10:23:54,758 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.8.ufo.UNBOUNDED.pals+Problem12_label02.c[33922,33935] [2020-12-22 10:23:55,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:23:55,726 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:23:55,856 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.8.ufo.UNBOUNDED.pals+Problem12_label02.c[26875,26888] [2020-12-22 10:23:55,881 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.8.ufo.UNBOUNDED.pals+Problem12_label02.c[33922,33935] [2020-12-22 10:23:56,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:23:56,561 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:23:56,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56 WrapperNode [2020-12-22 10:23:56,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:23:56,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:23:56,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:23:56,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:23:56,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:56,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:23:57,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:23:57,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:23:57,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:23:57,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (1/1) ... [2020-12-22 10:23:57,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:23:57,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:23:57,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:23:57,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:23:57,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (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 10:23:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:23:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:23:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:23:57,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:24:03,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:24:03,488 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:24:03,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:24:03 BoogieIcfgContainer [2020-12-22 10:24:03,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:24:03,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:24:03,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:24:03,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:24:03,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:23:54" (1/3) ... [2020-12-22 10:24:03,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf2183e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:24:03, skipping insertion in model container [2020-12-22 10:24:03,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:56" (2/3) ... [2020-12-22 10:24:03,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf2183e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:24:03, skipping insertion in model container [2020-12-22 10:24:03,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:24:03" (3/3) ... [2020-12-22 10:24:03,500 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:24:03,506 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:24:03,512 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:24:03,530 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:24:03,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:24:03,563 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:24:03,563 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:24:03,563 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:24:03,563 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:24:03,563 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:24:03,563 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:24:03,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:24:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:24:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:24:03,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:03,608 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] [2020-12-22 10:24:03,609 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2020-12-22 10:24:03,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:03,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547307292] [2020-12-22 10:24:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:03,933 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 10:24:03,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547307292] [2020-12-22 10:24:03,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:03,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:24:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473425932] [2020-12-22 10:24:03,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:24:03,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:03,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:24:03,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:24:03,962 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 2 states. [2020-12-22 10:24:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:04,058 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2020-12-22 10:24:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:24:04,060 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:24:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:04,101 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:24:04,101 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:24:04,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:24:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:24:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:24:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:24:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2020-12-22 10:24:04,263 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2020-12-22 10:24:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:04,264 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2020-12-22 10:24:04,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:24:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2020-12-22 10:24:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:24:04,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:04,267 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] [2020-12-22 10:24:04,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:24:04,268 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:04,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:24:04,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:04,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18701780] [2020-12-22 10:24:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:04,411 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 10:24:04,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18701780] [2020-12-22 10:24:04,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:04,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:24:04,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076779774] [2020-12-22 10:24:04,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:24:04,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:04,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:24:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:24:04,417 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand 5 states. [2020-12-22 10:24:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:04,650 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2020-12-22 10:24:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:24:04,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:24:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:04,657 INFO L225 Difference]: With dead ends: 979 [2020-12-22 10:24:04,657 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:24:04,658 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 10:24:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:24:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:24:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:24:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2020-12-22 10:24:04,683 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2020-12-22 10:24:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:04,683 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2020-12-22 10:24:04,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:24:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2020-12-22 10:24:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:24:04,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:04,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:04,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:24:04,687 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash 388486346, now seen corresponding path program 1 times [2020-12-22 10:24:04,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:04,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216005883] [2020-12-22 10:24:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:04,940 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 10:24:04,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216005883] [2020-12-22 10:24:04,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:04,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:04,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778830029] [2020-12-22 10:24:04,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:24:04,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:04,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:24:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:24:04,943 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand 4 states. [2020-12-22 10:24:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:15,343 INFO L93 Difference]: Finished difference Result 3153 states and 5938 transitions. [2020-12-22 10:24:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:24:15,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:24:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:15,357 INFO L225 Difference]: With dead ends: 3153 [2020-12-22 10:24:15,357 INFO L226 Difference]: Without dead ends: 2400 [2020-12-22 10:24:15,359 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 10:24:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-12-22 10:24:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2020-12-22 10:24:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2400 states. [2020-12-22 10:24:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3605 transitions. [2020-12-22 10:24:15,429 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3605 transitions. Word has length 63 [2020-12-22 10:24:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:15,429 INFO L481 AbstractCegarLoop]: Abstraction has 2400 states and 3605 transitions. [2020-12-22 10:24:15,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:24:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3605 transitions. [2020-12-22 10:24:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:15,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:15,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:15,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:24:15,434 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:24:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524655601] [2020-12-22 10:24:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:15,643 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 10:24:15,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524655601] [2020-12-22 10:24:15,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:15,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:15,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794818145] [2020-12-22 10:24:15,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:15,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:15,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:15,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:15,646 INFO L87 Difference]: Start difference. First operand 2400 states and 3605 transitions. Second operand 3 states. [2020-12-22 10:24:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:15,695 INFO L93 Difference]: Finished difference Result 2548 states and 3841 transitions. [2020-12-22 10:24:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:15,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:15,709 INFO L225 Difference]: With dead ends: 2548 [2020-12-22 10:24:15,709 INFO L226 Difference]: Without dead ends: 2471 [2020-12-22 10:24:15,711 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 10:24:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2020-12-22 10:24:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2020-12-22 10:24:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2020-12-22 10:24:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3716 transitions. [2020-12-22 10:24:15,785 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3716 transitions. Word has length 106 [2020-12-22 10:24:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:15,786 INFO L481 AbstractCegarLoop]: Abstraction has 2469 states and 3716 transitions. [2020-12-22 10:24:15,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3716 transitions. [2020-12-22 10:24:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:15,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:15,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:15,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:24:15,789 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:24:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:15,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225347159] [2020-12-22 10:24:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:15,952 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 10:24:15,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225347159] [2020-12-22 10:24:15,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:15,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223291679] [2020-12-22 10:24:15,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:15,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:15,956 INFO L87 Difference]: Start difference. First operand 2469 states and 3716 transitions. Second operand 3 states. [2020-12-22 10:24:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:16,018 INFO L93 Difference]: Finished difference Result 2749 states and 4164 transitions. [2020-12-22 10:24:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:16,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:16,035 INFO L225 Difference]: With dead ends: 2749 [2020-12-22 10:24:16,035 INFO L226 Difference]: Without dead ends: 2603 [2020-12-22 10:24:16,037 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 10:24:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2020-12-22 10:24:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2020-12-22 10:24:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2601 states. [2020-12-22 10:24:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3927 transitions. [2020-12-22 10:24:16,109 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3927 transitions. Word has length 106 [2020-12-22 10:24:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:16,110 INFO L481 AbstractCegarLoop]: Abstraction has 2601 states and 3927 transitions. [2020-12-22 10:24:16,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3927 transitions. [2020-12-22 10:24:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:16,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:16,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:16,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:24:16,119 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:16,119 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:24:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:16,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826840067] [2020-12-22 10:24:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:16,241 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 10:24:16,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826840067] [2020-12-22 10:24:16,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:16,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:16,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282679695] [2020-12-22 10:24:16,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:16,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:16,244 INFO L87 Difference]: Start difference. First operand 2601 states and 3927 transitions. Second operand 3 states. [2020-12-22 10:24:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:16,320 INFO L93 Difference]: Finished difference Result 3133 states and 4777 transitions. [2020-12-22 10:24:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:16,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:16,340 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:24:16,340 INFO L226 Difference]: Without dead ends: 2855 [2020-12-22 10:24:16,342 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 10:24:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2020-12-22 10:24:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2020-12-22 10:24:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2853 states. [2020-12-22 10:24:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4327 transitions. [2020-12-22 10:24:16,420 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4327 transitions. Word has length 106 [2020-12-22 10:24:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:16,422 INFO L481 AbstractCegarLoop]: Abstraction has 2853 states and 4327 transitions. [2020-12-22 10:24:16,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4327 transitions. [2020-12-22 10:24:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:16,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:16,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:16,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:24:16,425 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:24:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:16,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575373149] [2020-12-22 10:24:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:16,608 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 10:24:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575373149] [2020-12-22 10:24:16,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:16,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:16,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630851631] [2020-12-22 10:24:16,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:16,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:16,612 INFO L87 Difference]: Start difference. First operand 2853 states and 4327 transitions. Second operand 3 states. [2020-12-22 10:24:16,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:16,685 INFO L93 Difference]: Finished difference Result 3865 states and 5937 transitions. [2020-12-22 10:24:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:16,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:16,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:16,703 INFO L225 Difference]: With dead ends: 3865 [2020-12-22 10:24:16,703 INFO L226 Difference]: Without dead ends: 3335 [2020-12-22 10:24:16,706 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 10:24:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-12-22 10:24:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3333. [2020-12-22 10:24:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3333 states. [2020-12-22 10:24:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5083 transitions. [2020-12-22 10:24:16,825 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5083 transitions. Word has length 106 [2020-12-22 10:24:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:16,825 INFO L481 AbstractCegarLoop]: Abstraction has 3333 states and 5083 transitions. [2020-12-22 10:24:16,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5083 transitions. [2020-12-22 10:24:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:16,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:16,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:16,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:24:16,828 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:24:16,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:16,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545391521] [2020-12-22 10:24:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:16,957 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 10:24:16,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545391521] [2020-12-22 10:24:16,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:16,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:16,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421404127] [2020-12-22 10:24:16,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:16,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:16,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:16,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:16,959 INFO L87 Difference]: Start difference. First operand 3333 states and 5083 transitions. Second operand 3 states. [2020-12-22 10:24:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:17,070 INFO L93 Difference]: Finished difference Result 5257 states and 8125 transitions. [2020-12-22 10:24:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:17,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:17,093 INFO L225 Difference]: With dead ends: 5257 [2020-12-22 10:24:17,093 INFO L226 Difference]: Without dead ends: 4247 [2020-12-22 10:24:17,097 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 10:24:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2020-12-22 10:24:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4245. [2020-12-22 10:24:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4245 states. [2020-12-22 10:24:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 6507 transitions. [2020-12-22 10:24:17,278 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 6507 transitions. Word has length 106 [2020-12-22 10:24:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:17,278 INFO L481 AbstractCegarLoop]: Abstraction has 4245 states and 6507 transitions. [2020-12-22 10:24:17,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 6507 transitions. [2020-12-22 10:24:17,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:17,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:17,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:17,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:24:17,281 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:24:17,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:17,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786451499] [2020-12-22 10:24:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:17,390 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 10:24:17,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786451499] [2020-12-22 10:24:17,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:17,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:17,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145132766] [2020-12-22 10:24:17,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:17,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:17,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:17,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:17,395 INFO L87 Difference]: Start difference. First operand 4245 states and 6507 transitions. Second operand 3 states. [2020-12-22 10:24:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:17,569 INFO L93 Difference]: Finished difference Result 7897 states and 12237 transitions. [2020-12-22 10:24:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:17,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:17,625 INFO L225 Difference]: With dead ends: 7897 [2020-12-22 10:24:17,625 INFO L226 Difference]: Without dead ends: 5975 [2020-12-22 10:24:17,630 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 10:24:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2020-12-22 10:24:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5973. [2020-12-22 10:24:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5973 states. [2020-12-22 10:24:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 9179 transitions. [2020-12-22 10:24:17,888 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 9179 transitions. Word has length 106 [2020-12-22 10:24:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:17,889 INFO L481 AbstractCegarLoop]: Abstraction has 5973 states and 9179 transitions. [2020-12-22 10:24:17,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 9179 transitions. [2020-12-22 10:24:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:17,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:17,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:17,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:24:17,891 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:24:17,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:17,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393698210] [2020-12-22 10:24:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:17,982 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 10:24:17,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393698210] [2020-12-22 10:24:17,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:17,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:17,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156766071] [2020-12-22 10:24:17,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:17,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:17,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:17,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:17,987 INFO L87 Difference]: Start difference. First operand 5973 states and 9179 transitions. Second operand 3 states. [2020-12-22 10:24:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:18,318 INFO L93 Difference]: Finished difference Result 12889 states and 19933 transitions. [2020-12-22 10:24:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:18,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:18,343 INFO L225 Difference]: With dead ends: 12889 [2020-12-22 10:24:18,343 INFO L226 Difference]: Without dead ends: 9239 [2020-12-22 10:24:18,352 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 10:24:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9239 states. [2020-12-22 10:24:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9239 to 9237. [2020-12-22 10:24:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9237 states. [2020-12-22 10:24:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 14171 transitions. [2020-12-22 10:24:18,892 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 14171 transitions. Word has length 106 [2020-12-22 10:24:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:18,892 INFO L481 AbstractCegarLoop]: Abstraction has 9237 states and 14171 transitions. [2020-12-22 10:24:18,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 14171 transitions. [2020-12-22 10:24:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:18,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:18,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:18,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:24:18,894 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:24:18,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:18,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112431812] [2020-12-22 10:24:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:19,080 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 10:24:19,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112431812] [2020-12-22 10:24:19,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:19,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:19,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197682793] [2020-12-22 10:24:19,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:19,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:19,085 INFO L87 Difference]: Start difference. First operand 9237 states and 14171 transitions. Second operand 10 states. [2020-12-22 10:24:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:23,826 INFO L93 Difference]: Finished difference Result 119861 states and 185195 transitions. [2020-12-22 10:24:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:24:23,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:24:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:24,129 INFO L225 Difference]: With dead ends: 119861 [2020-12-22 10:24:24,130 INFO L226 Difference]: Without dead ends: 112947 [2020-12-22 10:24:24,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:24:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112947 states. [2020-12-22 10:24:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112947 to 16149. [2020-12-22 10:24:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16149 states. [2020-12-22 10:24:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 24603 transitions. [2020-12-22 10:24:26,508 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 24603 transitions. Word has length 106 [2020-12-22 10:24:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:26,508 INFO L481 AbstractCegarLoop]: Abstraction has 16149 states and 24603 transitions. [2020-12-22 10:24:26,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 24603 transitions. [2020-12-22 10:24:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:24:26,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:26,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:26,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:24:26,513 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:24:26,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:26,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422232749] [2020-12-22 10:24:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:26,644 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 10:24:26,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422232749] [2020-12-22 10:24:26,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:26,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:26,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045881551] [2020-12-22 10:24:26,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:26,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:26,647 INFO L87 Difference]: Start difference. First operand 16149 states and 24603 transitions. Second operand 3 states. [2020-12-22 10:24:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:28,061 INFO L93 Difference]: Finished difference Result 42393 states and 64413 transitions. [2020-12-22 10:24:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:28,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:24:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:28,121 INFO L225 Difference]: With dead ends: 42393 [2020-12-22 10:24:28,122 INFO L226 Difference]: Without dead ends: 28567 [2020-12-22 10:24:28,140 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 10:24:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28567 states. [2020-12-22 10:24:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28567 to 28309. [2020-12-22 10:24:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:24:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42395 transitions. [2020-12-22 10:24:29,628 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42395 transitions. Word has length 108 [2020-12-22 10:24:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:29,628 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42395 transitions. [2020-12-22 10:24:29,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42395 transitions. [2020-12-22 10:24:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:24:29,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:29,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:29,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:24:29,630 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:29,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:24:29,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:29,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625428124] [2020-12-22 10:24:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:30,178 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 10:24:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625428124] [2020-12-22 10:24:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489534223] [2020-12-22 10:24:30,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:30,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:30,186 INFO L87 Difference]: Start difference. First operand 28309 states and 42395 transitions. Second operand 10 states. [2020-12-22 10:24:30,610 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 10:24:30,736 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:24:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:32,233 INFO L93 Difference]: Finished difference Result 54297 states and 81309 transitions. [2020-12-22 10:24:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:32,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:24:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:32,277 INFO L225 Difference]: With dead ends: 54297 [2020-12-22 10:24:32,277 INFO L226 Difference]: Without dead ends: 28311 [2020-12-22 10:24:32,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:24:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28311 states. [2020-12-22 10:24:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28311 to 28309. [2020-12-22 10:24:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:24:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42139 transitions. [2020-12-22 10:24:34,045 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42139 transitions. Word has length 108 [2020-12-22 10:24:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:34,046 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42139 transitions. [2020-12-22 10:24:34,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42139 transitions. [2020-12-22 10:24:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:24:34,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:34,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:34,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:24:34,048 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:34,049 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:24:34,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:34,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009715195] [2020-12-22 10:24:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:34,207 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 10:24:34,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009715195] [2020-12-22 10:24:34,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:34,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:24:34,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10428753] [2020-12-22 10:24:34,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:24:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:24:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:24:34,209 INFO L87 Difference]: Start difference. First operand 28309 states and 42139 transitions. Second operand 6 states. [2020-12-22 10:24:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:36,221 INFO L93 Difference]: Finished difference Result 54295 states and 80796 transitions. [2020-12-22 10:24:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:24:36,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:24:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:36,253 INFO L225 Difference]: With dead ends: 54295 [2020-12-22 10:24:36,254 INFO L226 Difference]: Without dead ends: 28309 [2020-12-22 10:24:36,270 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 10:24:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28309 states. [2020-12-22 10:24:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28309 to 28309. [2020-12-22 10:24:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:24:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 41883 transitions. [2020-12-22 10:24:37,872 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 41883 transitions. Word has length 109 [2020-12-22 10:24:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:37,873 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 41883 transitions. [2020-12-22 10:24:37,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:24:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 41883 transitions. [2020-12-22 10:24:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:24:37,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:37,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:37,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:24:37,875 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:24:37,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:37,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651138258] [2020-12-22 10:24:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:38,013 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 10:24:38,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651138258] [2020-12-22 10:24:38,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:38,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:24:38,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90607413] [2020-12-22 10:24:38,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:24:38,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:38,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:24:38,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:24:38,016 INFO L87 Difference]: Start difference. First operand 28309 states and 41883 transitions. Second operand 8 states. [2020-12-22 10:24:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:41,678 INFO L93 Difference]: Finished difference Result 47679 states and 70096 transitions. [2020-12-22 10:24:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:41,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:24:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:41,728 INFO L225 Difference]: With dead ends: 47679 [2020-12-22 10:24:41,728 INFO L226 Difference]: Without dead ends: 47677 [2020-12-22 10:24:41,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:24:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47677 states. [2020-12-22 10:24:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47677 to 29077. [2020-12-22 10:24:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29077 states. [2020-12-22 10:24:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29077 states to 29077 states and 42523 transitions. [2020-12-22 10:24:43,945 INFO L78 Accepts]: Start accepts. Automaton has 29077 states and 42523 transitions. Word has length 109 [2020-12-22 10:24:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:43,946 INFO L481 AbstractCegarLoop]: Abstraction has 29077 states and 42523 transitions. [2020-12-22 10:24:43,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:24:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 29077 states and 42523 transitions. [2020-12-22 10:24:43,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:24:43,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:43,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:43,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:24:43,948 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:43,948 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:24:43,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:43,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214884217] [2020-12-22 10:24:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:44,025 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 10:24:44,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214884217] [2020-12-22 10:24:44,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:44,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:44,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502566534] [2020-12-22 10:24:44,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:44,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:44,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:44,028 INFO L87 Difference]: Start difference. First operand 29077 states and 42523 transitions. Second operand 3 states. [2020-12-22 10:24:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:46,631 INFO L93 Difference]: Finished difference Result 56220 states and 82465 transitions. [2020-12-22 10:24:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:46,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:24:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:46,674 INFO L225 Difference]: With dead ends: 56220 [2020-12-22 10:24:46,674 INFO L226 Difference]: Without dead ends: 41625 [2020-12-22 10:24:46,687 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 10:24:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41625 states. [2020-12-22 10:24:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41625 to 41623. [2020-12-22 10:24:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:24:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60573 transitions. [2020-12-22 10:24:49,496 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60573 transitions. Word has length 110 [2020-12-22 10:24:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:49,496 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60573 transitions. [2020-12-22 10:24:49,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60573 transitions. [2020-12-22 10:24:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 10:24:49,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:49,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:24:49,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:24:49,500 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash -453997123, now seen corresponding path program 1 times [2020-12-22 10:24:49,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:49,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075509062] [2020-12-22 10:24:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:24:49,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075509062] [2020-12-22 10:24:49,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:49,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:49,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365270963] [2020-12-22 10:24:49,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:24:49,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:24:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:24:49,662 INFO L87 Difference]: Start difference. First operand 41623 states and 60573 transitions. Second operand 4 states. [2020-12-22 10:25:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:00,108 INFO L93 Difference]: Finished difference Result 45417 states and 66678 transitions. [2020-12-22 10:25:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:25:00,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 10:25:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:00,144 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:25:00,144 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:25:00,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:25:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:25:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2020-12-22 10:25:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:25:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62158 transitions. [2020-12-22 10:25:02,863 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62158 transitions. Word has length 134 [2020-12-22 10:25:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:02,864 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62158 transitions. [2020-12-22 10:25:02,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:25:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62158 transitions. [2020-12-22 10:25:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:25:02,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:02,884 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:02,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:25:02,884 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:02,884 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:25:02,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:02,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565033839] [2020-12-22 10:25:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:25:03,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565033839] [2020-12-22 10:25:03,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:03,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:03,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110177190] [2020-12-22 10:25:03,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:03,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:03,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:03,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:03,104 INFO L87 Difference]: Start difference. First operand 43125 states and 62158 transitions. Second operand 10 states. [2020-12-22 10:25:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:23,320 INFO L93 Difference]: Finished difference Result 365063 states and 529495 transitions. [2020-12-22 10:25:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:23,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:25:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:23,856 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:25:23,856 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:25:23,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:25:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:25:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:25:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 118862 transitions. [2020-12-22 10:25:31,748 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 118862 transitions. Word has length 148 [2020-12-22 10:25:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:31,748 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 118862 transitions. [2020-12-22 10:25:31,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 118862 transitions. [2020-12-22 10:25:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:25:31,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:31,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:31,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:25:31,768 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:25:31,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:31,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982186165] [2020-12-22 10:25:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:25:32,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982186165] [2020-12-22 10:25:32,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:32,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593196633] [2020-12-22 10:25:32,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:32,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:32,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:32,229 INFO L87 Difference]: Start difference. First operand 82421 states and 118862 transitions. Second operand 10 states. [2020-12-22 10:25:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:57,983 INFO L93 Difference]: Finished difference Result 404359 states and 586199 transitions. [2020-12-22 10:25:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:57,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:25:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:58,570 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:25:58,571 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:25:58,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:26:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:26:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:26:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 203598 transitions. [2020-12-22 10:26:11,774 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 203598 transitions. Word has length 148 [2020-12-22 10:26:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:11,774 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 203598 transitions. [2020-12-22 10:26:11,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 203598 transitions. [2020-12-22 10:26:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:26:11,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:11,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:11,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:26:11,798 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:11,798 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:26:11,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:11,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007308168] [2020-12-22 10:26:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:26:12,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007308168] [2020-12-22 10:26:12,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:12,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479186699] [2020-12-22 10:26:12,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:12,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:12,011 INFO L87 Difference]: Start difference. First operand 141429 states and 203598 transitions. Second operand 10 states. [2020-12-22 10:26:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:43,070 INFO L93 Difference]: Finished difference Result 443655 states and 642903 transitions. [2020-12-22 10:26:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:43,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:26:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:43,699 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:26:43,700 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:26:43,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:26:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states.