/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:43:21,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:43:21,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:43:21,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:43:21,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:43:21,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:43:21,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:43:21,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:43:21,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:43:21,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:43:21,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:43:21,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:43:21,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:43:21,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:43:21,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:43:21,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:43:21,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:43:21,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:43:21,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:43:21,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:43:21,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:43:21,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:43:21,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:43:21,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:43:21,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:43:21,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:43:21,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:43:21,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:43:21,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:43:21,867 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:43:21,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:43:21,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:43:21,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:43:21,872 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:43:21,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:43:21,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:43:21,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:43:21,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:43:21,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:43:21,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:43:21,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:43:21,875 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:43:21,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:43:21,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:43:21,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:43:21,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:43:21,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:43:21,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:43:21,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:43:21,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:43:21,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:43:21,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:43:21,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:43:21,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:43:21,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:43:22,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:43:22,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:43:22,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:43:22,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:43:22,305 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:43:22,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:22,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0edd0b8/fcc5f525976742b0850791914bdc580b/FLAG6bbbcacf8 [2020-12-22 07:43:23,043 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:43:23,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:23,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0edd0b8/fcc5f525976742b0850791914bdc580b/FLAG6bbbcacf8 [2020-12-22 07:43:23,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0edd0b8/fcc5f525976742b0850791914bdc580b [2020-12-22 07:43:23,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:43:23,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:43:23,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:23,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:43:23,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:43:23,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:23" (1/1) ... [2020-12-22 07:43:23,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e9d645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:23, skipping insertion in model container [2020-12-22 07:43:23,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:23" (1/1) ... [2020-12-22 07:43:23,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:43:23,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:43:23,857 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2020-12-22 07:43:23,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:23,881 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:43:23,970 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2020-12-22 07:43:23,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:24,004 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:43:24,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24 WrapperNode [2020-12-22 07:43:24,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:24,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:24,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:43:24,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:43:24,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:24,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:43:24,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:43:24,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:43:24,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (1/1) ... [2020-12-22 07:43:24,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:43:24,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:43:24,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:43:24,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:43:24,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (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 07:43:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:43:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:43:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:43:24,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:43:25,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:43:25,916 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:43:25,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:25 BoogieIcfgContainer [2020-12-22 07:43:25,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:43:25,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:43:25,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:43:25,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:43:25,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:43:23" (1/3) ... [2020-12-22 07:43:25,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34446c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:25, skipping insertion in model container [2020-12-22 07:43:25,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:24" (2/3) ... [2020-12-22 07:43:25,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34446c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:25, skipping insertion in model container [2020-12-22 07:43:25,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:25" (3/3) ... [2020-12-22 07:43:25,935 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:25,942 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:43:25,949 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:43:25,972 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:43:26,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:43:26,021 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:43:26,021 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:43:26,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:43:26,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:43:26,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:43:26,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:43:26,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:43:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2020-12-22 07:43:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:26,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:26,083 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] [2020-12-22 07:43:26,084 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -196336848, now seen corresponding path program 1 times [2020-12-22 07:43:26,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:26,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647320300] [2020-12-22 07:43:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:26,662 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 07:43:26,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647320300] [2020-12-22 07:43:26,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:26,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:43:26,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881326745] [2020-12-22 07:43:26,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:43:26,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:43:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:26,694 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 2 states. [2020-12-22 07:43:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:26,770 INFO L93 Difference]: Finished difference Result 463 states and 821 transitions. [2020-12-22 07:43:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:43:26,772 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:43:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:26,806 INFO L225 Difference]: With dead ends: 463 [2020-12-22 07:43:26,806 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 07:43:26,810 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 07:43:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 07:43:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-22 07:43:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 07:43:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 586 transitions. [2020-12-22 07:43:26,882 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 586 transitions. Word has length 77 [2020-12-22 07:43:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:26,883 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 586 transitions. [2020-12-22 07:43:26,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:43:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 586 transitions. [2020-12-22 07:43:26,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:26,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:26,887 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] [2020-12-22 07:43:26,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:43:26,888 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash -330350354, now seen corresponding path program 1 times [2020-12-22 07:43:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:26,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907487367] [2020-12-22 07:43:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:27,094 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 07:43:27,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907487367] [2020-12-22 07:43:27,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:27,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:43:27,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998191575] [2020-12-22 07:43:27,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:43:27,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:27,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:43:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:27,105 INFO L87 Difference]: Start difference. First operand 327 states and 586 transitions. Second operand 5 states. [2020-12-22 07:43:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:27,267 INFO L93 Difference]: Finished difference Result 462 states and 814 transitions. [2020-12-22 07:43:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:43:27,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:43:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:27,271 INFO L225 Difference]: With dead ends: 462 [2020-12-22 07:43:27,272 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 07:43:27,274 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 07:43:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 07:43:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-22 07:43:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 07:43:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 540 transitions. [2020-12-22 07:43:27,292 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 540 transitions. Word has length 77 [2020-12-22 07:43:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:27,293 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 540 transitions. [2020-12-22 07:43:27,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 540 transitions. [2020-12-22 07:43:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:43:27,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:27,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:27,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:43:27,298 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:27,299 INFO L82 PathProgramCache]: Analyzing trace with hash -550758364, now seen corresponding path program 1 times [2020-12-22 07:43:27,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:27,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468649468] [2020-12-22 07:43:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:27,477 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 07:43:27,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468649468] [2020-12-22 07:43:27,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:27,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:27,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125685640] [2020-12-22 07:43:27,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:27,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:27,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:27,488 INFO L87 Difference]: Start difference. First operand 327 states and 540 transitions. Second operand 3 states. [2020-12-22 07:43:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:27,554 INFO L93 Difference]: Finished difference Result 577 states and 966 transitions. [2020-12-22 07:43:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:27,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 07:43:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:27,558 INFO L225 Difference]: With dead ends: 577 [2020-12-22 07:43:27,558 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 07:43:27,559 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 07:43:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 07:43:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2020-12-22 07:43:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 07:43:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2020-12-22 07:43:27,581 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 122 [2020-12-22 07:43:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:27,582 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2020-12-22 07:43:27,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2020-12-22 07:43:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:43:27,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:27,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:27,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:43:27,585 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1222100528, now seen corresponding path program 1 times [2020-12-22 07:43:27,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:27,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515712067] [2020-12-22 07:43:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:27,809 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 07:43:27,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515712067] [2020-12-22 07:43:27,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:27,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:27,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822407636] [2020-12-22 07:43:27,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:27,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:27,816 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand 3 states. [2020-12-22 07:43:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:27,872 INFO L93 Difference]: Finished difference Result 917 states and 1534 transitions. [2020-12-22 07:43:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:27,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 07:43:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:27,877 INFO L225 Difference]: With dead ends: 917 [2020-12-22 07:43:27,878 INFO L226 Difference]: Without dead ends: 670 [2020-12-22 07:43:27,879 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 07:43:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-12-22 07:43:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2020-12-22 07:43:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2020-12-22 07:43:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1109 transitions. [2020-12-22 07:43:27,921 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1109 transitions. Word has length 125 [2020-12-22 07:43:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:27,923 INFO L481 AbstractCegarLoop]: Abstraction has 666 states and 1109 transitions. [2020-12-22 07:43:27,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1109 transitions. [2020-12-22 07:43:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:43:27,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:27,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:27,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:43:27,927 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash -116041787, now seen corresponding path program 1 times [2020-12-22 07:43:27,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:27,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504113441] [2020-12-22 07:43:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:28,083 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 07:43:28,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504113441] [2020-12-22 07:43:28,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:28,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:28,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528529730] [2020-12-22 07:43:28,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:28,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:28,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:28,086 INFO L87 Difference]: Start difference. First operand 666 states and 1109 transitions. Second operand 3 states. [2020-12-22 07:43:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:28,137 INFO L93 Difference]: Finished difference Result 1566 states and 2623 transitions. [2020-12-22 07:43:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:28,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 07:43:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:28,145 INFO L225 Difference]: With dead ends: 1566 [2020-12-22 07:43:28,145 INFO L226 Difference]: Without dead ends: 1096 [2020-12-22 07:43:28,147 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 07:43:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-12-22 07:43:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1090. [2020-12-22 07:43:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-12-22 07:43:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1817 transitions. [2020-12-22 07:43:28,187 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1817 transitions. Word has length 128 [2020-12-22 07:43:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:28,187 INFO L481 AbstractCegarLoop]: Abstraction has 1090 states and 1817 transitions. [2020-12-22 07:43:28,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1817 transitions. [2020-12-22 07:43:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:43:28,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:28,190 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:28,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:43:28,191 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:28,191 INFO L82 PathProgramCache]: Analyzing trace with hash 655173041, now seen corresponding path program 1 times [2020-12-22 07:43:28,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:28,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317992571] [2020-12-22 07:43:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:28,331 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 07:43:28,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317992571] [2020-12-22 07:43:28,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:28,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274511767] [2020-12-22 07:43:28,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:28,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:28,334 INFO L87 Difference]: Start difference. First operand 1090 states and 1817 transitions. Second operand 3 states. [2020-12-22 07:43:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:28,398 INFO L93 Difference]: Finished difference Result 2798 states and 4675 transitions. [2020-12-22 07:43:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:28,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:43:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:28,411 INFO L225 Difference]: With dead ends: 2798 [2020-12-22 07:43:28,411 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 07:43:28,414 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 07:43:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 07:43:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1894. [2020-12-22 07:43:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2020-12-22 07:43:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3149 transitions. [2020-12-22 07:43:28,479 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3149 transitions. Word has length 131 [2020-12-22 07:43:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:28,480 INFO L481 AbstractCegarLoop]: Abstraction has 1894 states and 3149 transitions. [2020-12-22 07:43:28,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3149 transitions. [2020-12-22 07:43:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:43:28,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:28,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:28,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:43:28,483 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash 455457894, now seen corresponding path program 1 times [2020-12-22 07:43:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:28,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586232287] [2020-12-22 07:43:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:28,862 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 07:43:28,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586232287] [2020-12-22 07:43:28,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:28,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:43:28,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972425639] [2020-12-22 07:43:28,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:43:28,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:43:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:28,867 INFO L87 Difference]: Start difference. First operand 1894 states and 3149 transitions. Second operand 6 states. [2020-12-22 07:43:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:29,209 INFO L93 Difference]: Finished difference Result 7128 states and 11958 transitions. [2020-12-22 07:43:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:43:29,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 07:43:29,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:29,244 INFO L225 Difference]: With dead ends: 7128 [2020-12-22 07:43:29,244 INFO L226 Difference]: Without dead ends: 5430 [2020-12-22 07:43:29,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:29,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2020-12-22 07:43:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3479. [2020-12-22 07:43:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3479 states. [2020-12-22 07:43:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5791 transitions. [2020-12-22 07:43:29,422 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5791 transitions. Word has length 134 [2020-12-22 07:43:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:29,422 INFO L481 AbstractCegarLoop]: Abstraction has 3479 states and 5791 transitions. [2020-12-22 07:43:29,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:43:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5791 transitions. [2020-12-22 07:43:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:43:29,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:29,426 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, 1, 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 07:43:29,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:43:29,428 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:29,428 INFO L82 PathProgramCache]: Analyzing trace with hash -860313711, now seen corresponding path program 1 times [2020-12-22 07:43:29,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:29,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559062805] [2020-12-22 07:43:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:29,672 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 07:43:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559062805] [2020-12-22 07:43:29,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:29,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:29,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832340735] [2020-12-22 07:43:29,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:29,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:29,676 INFO L87 Difference]: Start difference. First operand 3479 states and 5791 transitions. Second operand 4 states. [2020-12-22 07:43:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:29,889 INFO L93 Difference]: Finished difference Result 10270 states and 17204 transitions. [2020-12-22 07:43:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:29,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:43:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:29,928 INFO L225 Difference]: With dead ends: 10270 [2020-12-22 07:43:29,928 INFO L226 Difference]: Without dead ends: 6987 [2020-12-22 07:43:29,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 07:43:29,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2020-12-22 07:43:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 5168. [2020-12-22 07:43:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5168 states. [2020-12-22 07:43:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 8619 transitions. [2020-12-22 07:43:30,176 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 8619 transitions. Word has length 135 [2020-12-22 07:43:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:30,176 INFO L481 AbstractCegarLoop]: Abstraction has 5168 states and 8619 transitions. [2020-12-22 07:43:30,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 8619 transitions. [2020-12-22 07:43:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:30,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:30,181 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, 1, 1, 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 07:43:30,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:43:30,182 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1469443837, now seen corresponding path program 1 times [2020-12-22 07:43:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:30,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417804402] [2020-12-22 07:43:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:30,354 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 07:43:30,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417804402] [2020-12-22 07:43:30,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:30,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:30,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395964322] [2020-12-22 07:43:30,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:30,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:30,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:30,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:30,357 INFO L87 Difference]: Start difference. First operand 5168 states and 8619 transitions. Second operand 4 states. [2020-12-22 07:43:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:30,702 INFO L93 Difference]: Finished difference Result 15356 states and 25688 transitions. [2020-12-22 07:43:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:30,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 07:43:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:30,766 INFO L225 Difference]: With dead ends: 15356 [2020-12-22 07:43:30,767 INFO L226 Difference]: Without dead ends: 10384 [2020-12-22 07:43:30,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:43:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10384 states. [2020-12-22 07:43:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10384 to 7654. [2020-12-22 07:43:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7654 states. [2020-12-22 07:43:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 12751 transitions. [2020-12-22 07:43:31,158 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 12751 transitions. Word has length 136 [2020-12-22 07:43:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:31,159 INFO L481 AbstractCegarLoop]: Abstraction has 7654 states and 12751 transitions. [2020-12-22 07:43:31,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 12751 transitions. [2020-12-22 07:43:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:43:31,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:31,165 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, 1, 1, 1, 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 07:43:31,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:43:31,166 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash 846488136, now seen corresponding path program 1 times [2020-12-22 07:43:31,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:31,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770000518] [2020-12-22 07:43:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:31,372 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 07:43:31,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770000518] [2020-12-22 07:43:31,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:31,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:31,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890971671] [2020-12-22 07:43:31,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:31,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:31,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:31,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:31,375 INFO L87 Difference]: Start difference. First operand 7654 states and 12751 transitions. Second operand 4 states. [2020-12-22 07:43:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:31,849 INFO L93 Difference]: Finished difference Result 22512 states and 37612 transitions. [2020-12-22 07:43:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:31,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-12-22 07:43:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:31,891 INFO L225 Difference]: With dead ends: 22512 [2020-12-22 07:43:31,892 INFO L226 Difference]: Without dead ends: 15054 [2020-12-22 07:43:31,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:43:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2020-12-22 07:43:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 11320. [2020-12-22 07:43:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11320 states. [2020-12-22 07:43:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 18835 transitions. [2020-12-22 07:43:32,436 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 18835 transitions. Word has length 137 [2020-12-22 07:43:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:32,437 INFO L481 AbstractCegarLoop]: Abstraction has 11320 states and 18835 transitions. [2020-12-22 07:43:32,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 18835 transitions. [2020-12-22 07:43:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:32,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:32,445 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, 1, 1, 1, 1, 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 07:43:32,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:43:32,446 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1116265068, now seen corresponding path program 1 times [2020-12-22 07:43:32,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:32,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380130312] [2020-12-22 07:43:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:32,649 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 07:43:32,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380130312] [2020-12-22 07:43:32,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:32,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643418016] [2020-12-22 07:43:32,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:32,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:32,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:32,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:32,655 INFO L87 Difference]: Start difference. First operand 11320 states and 18835 transitions. Second operand 4 states. [2020-12-22 07:43:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:33,187 INFO L93 Difference]: Finished difference Result 34076 states and 56840 transitions. [2020-12-22 07:43:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:33,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:43:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:33,242 INFO L225 Difference]: With dead ends: 34076 [2020-12-22 07:43:33,242 INFO L226 Difference]: Without dead ends: 22952 [2020-12-22 07:43:33,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:43:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22952 states. [2020-12-22 07:43:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22952 to 16656. [2020-12-22 07:43:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16656 states. [2020-12-22 07:43:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16656 states to 16656 states and 27677 transitions. [2020-12-22 07:43:33,992 INFO L78 Accepts]: Start accepts. Automaton has 16656 states and 27677 transitions. Word has length 138 [2020-12-22 07:43:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:33,993 INFO L481 AbstractCegarLoop]: Abstraction has 16656 states and 27677 transitions. [2020-12-22 07:43:33,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 16656 states and 27677 transitions. [2020-12-22 07:43:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:34,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:34,000 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, 1, 1, 1, 1, 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 07:43:34,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:43:34,001 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -397139727, now seen corresponding path program 1 times [2020-12-22 07:43:34,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:34,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048077598] [2020-12-22 07:43:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:34,187 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 07:43:34,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048077598] [2020-12-22 07:43:34,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:34,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:34,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946275721] [2020-12-22 07:43:34,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:34,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:34,189 INFO L87 Difference]: Start difference. First operand 16656 states and 27677 transitions. Second operand 3 states. [2020-12-22 07:43:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:34,739 INFO L93 Difference]: Finished difference Result 37966 states and 63047 transitions. [2020-12-22 07:43:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:34,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:34,811 INFO L225 Difference]: With dead ends: 37966 [2020-12-22 07:43:34,811 INFO L226 Difference]: Without dead ends: 26336 [2020-12-22 07:43:34,831 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 07:43:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26336 states. [2020-12-22 07:43:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26336 to 26334. [2020-12-22 07:43:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26334 states. [2020-12-22 07:43:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26334 states to 26334 states and 43507 transitions. [2020-12-22 07:43:36,091 INFO L78 Accepts]: Start accepts. Automaton has 26334 states and 43507 transitions. Word has length 138 [2020-12-22 07:43:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:36,092 INFO L481 AbstractCegarLoop]: Abstraction has 26334 states and 43507 transitions. [2020-12-22 07:43:36,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 26334 states and 43507 transitions. [2020-12-22 07:43:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:36,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:36,097 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, 1, 1, 1, 1, 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 07:43:36,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:43:36,098 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:36,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1906561851, now seen corresponding path program 1 times [2020-12-22 07:43:36,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:36,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128176049] [2020-12-22 07:43:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:36,183 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 07:43:36,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128176049] [2020-12-22 07:43:36,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:36,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:36,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113990053] [2020-12-22 07:43:36,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:36,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:36,186 INFO L87 Difference]: Start difference. First operand 26334 states and 43507 transitions. Second operand 3 states. [2020-12-22 07:43:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:37,166 INFO L93 Difference]: Finished difference Result 57932 states and 95841 transitions. [2020-12-22 07:43:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:37,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:37,270 INFO L225 Difference]: With dead ends: 57932 [2020-12-22 07:43:37,270 INFO L226 Difference]: Without dead ends: 39738 [2020-12-22 07:43:37,308 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 07:43:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39738 states. [2020-12-22 07:43:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39738 to 39736. [2020-12-22 07:43:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39736 states. [2020-12-22 07:43:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39736 states to 39736 states and 65427 transitions. [2020-12-22 07:43:38,572 INFO L78 Accepts]: Start accepts. Automaton has 39736 states and 65427 transitions. Word has length 138 [2020-12-22 07:43:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:38,576 INFO L481 AbstractCegarLoop]: Abstraction has 39736 states and 65427 transitions. [2020-12-22 07:43:38,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 39736 states and 65427 transitions. [2020-12-22 07:43:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:38,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:38,580 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, 1, 1, 1, 1, 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 07:43:38,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:43:38,581 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:38,581 INFO L82 PathProgramCache]: Analyzing trace with hash 968808881, now seen corresponding path program 1 times [2020-12-22 07:43:38,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:38,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560590966] [2020-12-22 07:43:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:38,700 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 07:43:38,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560590966] [2020-12-22 07:43:38,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:38,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:38,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318004546] [2020-12-22 07:43:38,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:38,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:38,703 INFO L87 Difference]: Start difference. First operand 39736 states and 65427 transitions. Second operand 3 states. [2020-12-22 07:43:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:40,002 INFO L93 Difference]: Finished difference Result 87708 states and 144475 transitions. [2020-12-22 07:43:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:40,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:40,149 INFO L225 Difference]: With dead ends: 87708 [2020-12-22 07:43:40,150 INFO L226 Difference]: Without dead ends: 59888 [2020-12-22 07:43:40,182 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 07:43:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59888 states. [2020-12-22 07:43:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59888 to 59886. [2020-12-22 07:43:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59886 states. [2020-12-22 07:43:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59886 states to 59886 states and 98095 transitions. [2020-12-22 07:43:42,037 INFO L78 Accepts]: Start accepts. Automaton has 59886 states and 98095 transitions. Word has length 138 [2020-12-22 07:43:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:42,038 INFO L481 AbstractCegarLoop]: Abstraction has 59886 states and 98095 transitions. [2020-12-22 07:43:42,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 59886 states and 98095 transitions. [2020-12-22 07:43:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:42,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:42,041 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, 1, 1, 1, 1, 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 07:43:42,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:43:42,041 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1444659835, now seen corresponding path program 1 times [2020-12-22 07:43:42,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:42,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983670108] [2020-12-22 07:43:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:42,148 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 07:43:42,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983670108] [2020-12-22 07:43:42,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302664658] [2020-12-22 07:43:42,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:42,152 INFO L87 Difference]: Start difference. First operand 59886 states and 98095 transitions. Second operand 3 states. [2020-12-22 07:43:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:44,219 INFO L93 Difference]: Finished difference Result 133055 states and 218966 transitions. [2020-12-22 07:43:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:44,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:44,387 INFO L225 Difference]: With dead ends: 133055 [2020-12-22 07:43:44,387 INFO L226 Difference]: Without dead ends: 90317 [2020-12-22 07:43:44,425 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 07:43:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90317 states. [2020-12-22 07:43:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90317 to 90315. [2020-12-22 07:43:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90315 states. [2020-12-22 07:43:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90315 states to 90315 states and 147458 transitions. [2020-12-22 07:43:47,126 INFO L78 Accepts]: Start accepts. Automaton has 90315 states and 147458 transitions. Word has length 138 [2020-12-22 07:43:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:47,126 INFO L481 AbstractCegarLoop]: Abstraction has 90315 states and 147458 transitions. [2020-12-22 07:43:47,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 90315 states and 147458 transitions. [2020-12-22 07:43:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:43:47,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:47,128 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, 1, 1, 1, 1, 1, 1, 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 07:43:47,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:43:47,129 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:47,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1205053460, now seen corresponding path program 1 times [2020-12-22 07:43:47,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:47,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941328056] [2020-12-22 07:43:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:47,380 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 07:43:47,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941328056] [2020-12-22 07:43:47,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:47,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122162091] [2020-12-22 07:43:47,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:47,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:47,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:47,383 INFO L87 Difference]: Start difference. First operand 90315 states and 147458 transitions. Second operand 4 states. [2020-12-22 07:43:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:51,542 INFO L93 Difference]: Finished difference Result 268361 states and 437908 transitions. [2020-12-22 07:43:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:51,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:43:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:51,978 INFO L225 Difference]: With dead ends: 268361 [2020-12-22 07:43:51,978 INFO L226 Difference]: Without dead ends: 178057 [2020-12-22 07:43:52,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:43:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178057 states. [2020-12-22 07:43:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178057 to 178055. [2020-12-22 07:43:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178055 states. [2020-12-22 07:43:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178055 states to 178055 states and 289292 transitions. [2020-12-22 07:43:58,188 INFO L78 Accepts]: Start accepts. Automaton has 178055 states and 289292 transitions. Word has length 140 [2020-12-22 07:43:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:58,188 INFO L481 AbstractCegarLoop]: Abstraction has 178055 states and 289292 transitions. [2020-12-22 07:43:58,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 178055 states and 289292 transitions. [2020-12-22 07:43:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:43:58,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:58,201 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, 1, 1, 1, 1, 1, 1, 1, 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 07:43:58,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:43:58,202 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash -38716708, now seen corresponding path program 1 times [2020-12-22 07:43:58,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:58,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908897347] [2020-12-22 07:43:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:58,319 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 07:43:58,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908897347] [2020-12-22 07:43:58,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:58,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216970703] [2020-12-22 07:43:58,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:58,322 INFO L87 Difference]: Start difference. First operand 178055 states and 289292 transitions. Second operand 3 states. [2020-12-22 07:44:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:03,654 INFO L93 Difference]: Finished difference Result 432222 states and 705318 transitions. [2020-12-22 07:44:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:03,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-12-22 07:44:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:04,154 INFO L225 Difference]: With dead ends: 432222 [2020-12-22 07:44:04,154 INFO L226 Difference]: Without dead ends: 254565 [2020-12-22 07:44:04,270 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 07:44:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254565 states. [2020-12-22 07:44:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254565 to 246049. [2020-12-22 07:44:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246049 states. [2020-12-22 07:44:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246049 states to 246049 states and 398035 transitions. [2020-12-22 07:44:12,037 INFO L78 Accepts]: Start accepts. Automaton has 246049 states and 398035 transitions. Word has length 141 [2020-12-22 07:44:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:12,037 INFO L481 AbstractCegarLoop]: Abstraction has 246049 states and 398035 transitions. [2020-12-22 07:44:12,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 246049 states and 398035 transitions. [2020-12-22 07:44:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:12,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:12,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:12,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:44:12,059 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:12,062 INFO L82 PathProgramCache]: Analyzing trace with hash 168060510, now seen corresponding path program 1 times [2020-12-22 07:44:12,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:12,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474977985] [2020-12-22 07:44:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:12,121 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 07:44:12,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474977985] [2020-12-22 07:44:12,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:12,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:12,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766504416] [2020-12-22 07:44:12,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:12,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:12,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:12,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:12,127 INFO L87 Difference]: Start difference. First operand 246049 states and 398035 transitions. Second operand 3 states. [2020-12-22 07:44:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:21,996 INFO L93 Difference]: Finished difference Result 738110 states and 1194042 transitions. [2020-12-22 07:44:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:21,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:23,250 INFO L225 Difference]: With dead ends: 738110 [2020-12-22 07:44:23,250 INFO L226 Difference]: Without dead ends: 492082 [2020-12-22 07:44:23,477 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 07:44:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492082 states. [2020-12-22 07:44:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492082 to 246062. [2020-12-22 07:44:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246062 states. [2020-12-22 07:44:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246062 states to 246062 states and 398054 transitions. [2020-12-22 07:44:33,177 INFO L78 Accepts]: Start accepts. Automaton has 246062 states and 398054 transitions. Word has length 142 [2020-12-22 07:44:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:33,177 INFO L481 AbstractCegarLoop]: Abstraction has 246062 states and 398054 transitions. [2020-12-22 07:44:33,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 246062 states and 398054 transitions. [2020-12-22 07:44:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:33,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:33,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:33,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:44:33,179 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1852226887, now seen corresponding path program 1 times [2020-12-22 07:44:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:33,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258749596] [2020-12-22 07:44:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:33,306 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 07:44:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258749596] [2020-12-22 07:44:33,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:33,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:33,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131326042] [2020-12-22 07:44:33,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:33,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:33,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:33,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:33,308 INFO L87 Difference]: Start difference. First operand 246062 states and 398054 transitions. Second operand 3 states. [2020-12-22 07:44:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:46,393 INFO L93 Difference]: Finished difference Result 730829 states and 1181447 transitions. [2020-12-22 07:44:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:46,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:47,469 INFO L225 Difference]: With dead ends: 730829 [2020-12-22 07:44:47,470 INFO L226 Difference]: Without dead ends: 484905 [2020-12-22 07:44:47,714 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 07:44:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484905 states. [2020-12-22 07:45:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484905 to 484903. [2020-12-22 07:45:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484903 states. [2020-12-22 07:45:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484903 states to 484903 states and 780343 transitions. [2020-12-22 07:45:04,569 INFO L78 Accepts]: Start accepts. Automaton has 484903 states and 780343 transitions. Word has length 142 [2020-12-22 07:45:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:04,570 INFO L481 AbstractCegarLoop]: Abstraction has 484903 states and 780343 transitions. [2020-12-22 07:45:04,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 484903 states and 780343 transitions. [2020-12-22 07:45:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:45:04,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:04,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:04,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:45:04,588 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1530807031, now seen corresponding path program 1 times [2020-12-22 07:45:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:04,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997010996] [2020-12-22 07:45:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:04,909 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 07:45:04,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997010996] [2020-12-22 07:45:04,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:04,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:04,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152392241] [2020-12-22 07:45:04,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:04,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:04,912 INFO L87 Difference]: Start difference. First operand 484903 states and 780343 transitions. Second operand 4 states. [2020-12-22 07:45:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:29,612 INFO L93 Difference]: Finished difference Result 1441582 states and 2320410 transitions. [2020-12-22 07:45:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:29,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:45:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:32,380 INFO L225 Difference]: With dead ends: 1441582 [2020-12-22 07:45:32,380 INFO L226 Difference]: Without dead ends: 956716 [2020-12-22 07:45:32,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:45:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956716 states. [2020-12-22 07:46:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956716 to 956714. [2020-12-22 07:46:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956714 states. [2020-12-22 07:46:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956714 states to 956714 states and 1532770 transitions. [2020-12-22 07:46:19,111 INFO L78 Accepts]: Start accepts. Automaton has 956714 states and 1532770 transitions. Word has length 143 [2020-12-22 07:46:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:19,123 INFO L481 AbstractCegarLoop]: Abstraction has 956714 states and 1532770 transitions. [2020-12-22 07:46:19,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 956714 states and 1532770 transitions. [2020-12-22 07:46:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 07:46:19,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:19,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:19,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:46:19,150 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:19,155 INFO L82 PathProgramCache]: Analyzing trace with hash -559970864, now seen corresponding path program 1 times [2020-12-22 07:46:19,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:19,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371647413] [2020-12-22 07:46:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:19,295 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 07:46:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371647413] [2020-12-22 07:46:19,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:19,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462752651] [2020-12-22 07:46:19,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:19,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:19,305 INFO L87 Difference]: Start difference. First operand 956714 states and 1532770 transitions. Second operand 3 states.