/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_floodmax.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:17:30,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:17:30,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:17:30,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:17:30,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:17:30,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:17:30,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:17:30,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:17:30,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:17:30,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:17:30,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:17:30,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:17:30,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:17:30,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:17:30,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:17:30,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:17:30,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:17:30,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:17:30,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:17:30,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:17:30,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:17:30,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:17:30,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:17:30,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:17:30,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:17:30,922 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:17:30,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:17:30,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:17:30,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:17:30,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:17:30,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:17:30,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:17:30,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:17:30,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:17:30,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:17:30,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:17:30,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:17:30,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:17:30,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:17:30,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:17:30,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:17:30,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:17:30,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:17:30,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:17:30,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:17:30,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:17:30,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:17:31,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:17:31,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:17:31,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:17:31,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:17:31,329 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:17:31,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:17:31,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be221cadc/eadfc6d6edc34c7fa4432298e2123937/FLAG37d7b9ced [2020-12-22 07:17:32,214 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:17:32,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:17:32,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be221cadc/eadfc6d6edc34c7fa4432298e2123937/FLAG37d7b9ced [2020-12-22 07:17:32,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be221cadc/eadfc6d6edc34c7fa4432298e2123937 [2020-12-22 07:17:32,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:17:32,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:17:32,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:17:32,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:17:32,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:17:32,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:32,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7551525e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32, skipping insertion in model container [2020-12-22 07:17:32,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:32,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:17:32,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:17:32,849 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_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2020-12-22 07:17:32,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:17:32,866 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:17:32,934 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_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2020-12-22 07:17:32,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:17:32,957 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:17:32,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32 WrapperNode [2020-12-22 07:17:32,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:17:32,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:17:32,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:17:32,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:17:32,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:32,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:17:33,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:17:33,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:17:33,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:17:33,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (1/1) ... [2020-12-22 07:17:33,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:17:33,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:17:33,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:17:33,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:17:33,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (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 07:17:33,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:17:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:17:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:17:33,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:17:34,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:17:34,163 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:17:34,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:17:34 BoogieIcfgContainer [2020-12-22 07:17:34,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:17:34,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:17:34,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:17:34,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:17:34,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:17:32" (1/3) ... [2020-12-22 07:17:34,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47be6269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:17:34, skipping insertion in model container [2020-12-22 07:17:34,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:32" (2/3) ... [2020-12-22 07:17:34,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47be6269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:17:34, skipping insertion in model container [2020-12-22 07:17:34,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:17:34" (3/3) ... [2020-12-22 07:17:34,176 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:17:34,183 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:17:34,189 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:17:34,208 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:17:34,238 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:17:34,238 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:17:34,238 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:17:34,238 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:17:34,239 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:17:34,239 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:17:34,239 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:17:34,239 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:17:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-12-22 07:17:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:17:34,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:34,270 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] [2020-12-22 07:17:34,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1238377303, now seen corresponding path program 1 times [2020-12-22 07:17:34,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:34,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890939945] [2020-12-22 07:17:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:34,636 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 07:17:34,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890939945] [2020-12-22 07:17:34,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:34,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:17:34,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181271432] [2020-12-22 07:17:34,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:17:34,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:17:34,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:17:34,674 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 2 states. [2020-12-22 07:17:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:34,715 INFO L93 Difference]: Finished difference Result 206 states and 353 transitions. [2020-12-22 07:17:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:17:34,717 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:17:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:34,732 INFO L225 Difference]: With dead ends: 206 [2020-12-22 07:17:34,732 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 07:17:34,736 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 07:17:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 07:17:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-22 07:17:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 07:17:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 216 transitions. [2020-12-22 07:17:34,791 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 216 transitions. Word has length 37 [2020-12-22 07:17:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:34,792 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 216 transitions. [2020-12-22 07:17:34,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:17:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 216 transitions. [2020-12-22 07:17:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:17:34,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:34,795 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] [2020-12-22 07:17:34,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:17:34,796 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 420728853, now seen corresponding path program 1 times [2020-12-22 07:17:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832109827] [2020-12-22 07:17:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:34,949 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 07:17:34,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832109827] [2020-12-22 07:17:34,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:34,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:34,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424951990] [2020-12-22 07:17:34,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:34,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:34,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:34,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:34,957 INFO L87 Difference]: Start difference. First operand 126 states and 216 transitions. Second operand 5 states. [2020-12-22 07:17:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:35,116 INFO L93 Difference]: Finished difference Result 205 states and 346 transitions. [2020-12-22 07:17:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:17:35,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:17:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:35,120 INFO L225 Difference]: With dead ends: 205 [2020-12-22 07:17:35,120 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 07:17:35,123 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 07:17:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 07:17:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-22 07:17:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 07:17:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 195 transitions. [2020-12-22 07:17:35,155 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 195 transitions. Word has length 37 [2020-12-22 07:17:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:35,156 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 195 transitions. [2020-12-22 07:17:35,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 195 transitions. [2020-12-22 07:17:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:17:35,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:35,161 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] [2020-12-22 07:17:35,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:17:35,164 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:35,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1846122567, now seen corresponding path program 1 times [2020-12-22 07:17:35,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:35,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855333733] [2020-12-22 07:17:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:35,292 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 07:17:35,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855333733] [2020-12-22 07:17:35,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:35,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:35,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147374806] [2020-12-22 07:17:35,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:35,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:35,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:35,295 INFO L87 Difference]: Start difference. First operand 126 states and 195 transitions. Second operand 3 states. [2020-12-22 07:17:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:35,416 INFO L93 Difference]: Finished difference Result 267 states and 430 transitions. [2020-12-22 07:17:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:35,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 07:17:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:35,423 INFO L225 Difference]: With dead ends: 267 [2020-12-22 07:17:35,423 INFO L226 Difference]: Without dead ends: 192 [2020-12-22 07:17:35,427 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 07:17:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-22 07:17:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-12-22 07:17:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 07:17:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 296 transitions. [2020-12-22 07:17:35,451 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 296 transitions. Word has length 57 [2020-12-22 07:17:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:35,452 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 296 transitions. [2020-12-22 07:17:35,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 296 transitions. [2020-12-22 07:17:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 07:17:35,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:35,455 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] [2020-12-22 07:17:35,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:17:35,456 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:35,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1343531320, now seen corresponding path program 1 times [2020-12-22 07:17:35,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:35,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330971567] [2020-12-22 07:17:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:35,616 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 07:17:35,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330971567] [2020-12-22 07:17:35,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:35,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:35,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808002310] [2020-12-22 07:17:35,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:35,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:35,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:35,620 INFO L87 Difference]: Start difference. First operand 189 states and 296 transitions. Second operand 3 states. [2020-12-22 07:17:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:35,682 INFO L93 Difference]: Finished difference Result 451 states and 724 transitions. [2020-12-22 07:17:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:35,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 07:17:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:35,694 INFO L225 Difference]: With dead ends: 451 [2020-12-22 07:17:35,695 INFO L226 Difference]: Without dead ends: 313 [2020-12-22 07:17:35,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-12-22 07:17:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2020-12-22 07:17:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-12-22 07:17:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 490 transitions. [2020-12-22 07:17:35,759 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 490 transitions. Word has length 59 [2020-12-22 07:17:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:35,760 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 490 transitions. [2020-12-22 07:17:35,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 490 transitions. [2020-12-22 07:17:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 07:17:35,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:35,768 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] [2020-12-22 07:17:35,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:17:35,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1628241783, now seen corresponding path program 1 times [2020-12-22 07:17:35,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:35,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862050677] [2020-12-22 07:17:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:35,900 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 07:17:35,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862050677] [2020-12-22 07:17:35,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:35,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:35,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390779769] [2020-12-22 07:17:35,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:35,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:35,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:35,906 INFO L87 Difference]: Start difference. First operand 309 states and 490 transitions. Second operand 3 states. [2020-12-22 07:17:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:35,994 INFO L93 Difference]: Finished difference Result 797 states and 1280 transitions. [2020-12-22 07:17:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:35,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 07:17:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:36,001 INFO L225 Difference]: With dead ends: 797 [2020-12-22 07:17:36,002 INFO L226 Difference]: Without dead ends: 539 [2020-12-22 07:17:36,006 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 07:17:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-12-22 07:17:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 533. [2020-12-22 07:17:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-12-22 07:17:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 846 transitions. [2020-12-22 07:17:36,062 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 846 transitions. Word has length 61 [2020-12-22 07:17:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:36,064 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 846 transitions. [2020-12-22 07:17:36,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 846 transitions. [2020-12-22 07:17:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:17:36,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:36,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:36,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:17:36,073 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1563109830, now seen corresponding path program 1 times [2020-12-22 07:17:36,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:36,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808059723] [2020-12-22 07:17:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:17:36,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808059723] [2020-12-22 07:17:36,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:36,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:36,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844578020] [2020-12-22 07:17:36,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:36,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:36,294 INFO L87 Difference]: Start difference. First operand 533 states and 846 transitions. Second operand 5 states. [2020-12-22 07:17:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:36,567 INFO L93 Difference]: Finished difference Result 2297 states and 3740 transitions. [2020-12-22 07:17:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:17:36,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 07:17:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:36,579 INFO L225 Difference]: With dead ends: 2297 [2020-12-22 07:17:36,579 INFO L226 Difference]: Without dead ends: 1815 [2020-12-22 07:17:36,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:17:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2020-12-22 07:17:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 954. [2020-12-22 07:17:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2020-12-22 07:17:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1526 transitions. [2020-12-22 07:17:36,634 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1526 transitions. Word has length 63 [2020-12-22 07:17:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:36,635 INFO L481 AbstractCegarLoop]: Abstraction has 954 states and 1526 transitions. [2020-12-22 07:17:36,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1526 transitions. [2020-12-22 07:17:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:17:36,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:36,637 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] [2020-12-22 07:17:36,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:17:36,637 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:36,638 INFO L82 PathProgramCache]: Analyzing trace with hash -711068186, now seen corresponding path program 1 times [2020-12-22 07:17:36,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:36,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262441377] [2020-12-22 07:17:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:36,706 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 07:17:36,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262441377] [2020-12-22 07:17:36,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:36,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612577951] [2020-12-22 07:17:36,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:36,710 INFO L87 Difference]: Start difference. First operand 954 states and 1526 transitions. Second operand 4 states. [2020-12-22 07:17:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:36,838 INFO L93 Difference]: Finished difference Result 2787 states and 4527 transitions. [2020-12-22 07:17:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:36,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 07:17:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:36,852 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 07:17:36,852 INFO L226 Difference]: Without dead ends: 1884 [2020-12-22 07:17:36,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:17:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2020-12-22 07:17:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1410. [2020-12-22 07:17:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1410 states. [2020-12-22 07:17:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2269 transitions. [2020-12-22 07:17:36,936 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2269 transitions. Word has length 64 [2020-12-22 07:17:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:36,938 INFO L481 AbstractCegarLoop]: Abstraction has 1410 states and 2269 transitions. [2020-12-22 07:17:36,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2269 transitions. [2020-12-22 07:17:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:17:36,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:36,940 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] [2020-12-22 07:17:36,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:17:36,941 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1972861693, now seen corresponding path program 1 times [2020-12-22 07:17:36,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:36,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957121075] [2020-12-22 07:17:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:17:37,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957121075] [2020-12-22 07:17:37,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:37,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:37,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381634077] [2020-12-22 07:17:37,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:37,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:37,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:37,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:37,053 INFO L87 Difference]: Start difference. First operand 1410 states and 2269 transitions. Second operand 4 states. [2020-12-22 07:17:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:37,211 INFO L93 Difference]: Finished difference Result 4210 states and 6830 transitions. [2020-12-22 07:17:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:37,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 07:17:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:37,226 INFO L225 Difference]: With dead ends: 4210 [2020-12-22 07:17:37,227 INFO L226 Difference]: Without dead ends: 2851 [2020-12-22 07:17:37,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 07:17:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2020-12-22 07:17:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2061. [2020-12-22 07:17:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2020-12-22 07:17:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3316 transitions. [2020-12-22 07:17:37,329 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3316 transitions. Word has length 65 [2020-12-22 07:17:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:37,330 INFO L481 AbstractCegarLoop]: Abstraction has 2061 states and 3316 transitions. [2020-12-22 07:17:37,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3316 transitions. [2020-12-22 07:17:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:17:37,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:37,332 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] [2020-12-22 07:17:37,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:17:37,332 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -555653635, now seen corresponding path program 1 times [2020-12-22 07:17:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:37,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407926368] [2020-12-22 07:17:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:37,416 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 07:17:37,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407926368] [2020-12-22 07:17:37,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:37,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:37,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112860493] [2020-12-22 07:17:37,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:37,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:37,419 INFO L87 Difference]: Start difference. First operand 2061 states and 3316 transitions. Second operand 4 states. [2020-12-22 07:17:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:37,595 INFO L93 Difference]: Finished difference Result 5951 states and 9641 transitions. [2020-12-22 07:17:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:37,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 07:17:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:37,617 INFO L225 Difference]: With dead ends: 5951 [2020-12-22 07:17:37,617 INFO L226 Difference]: Without dead ends: 3941 [2020-12-22 07:17:37,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:17:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2020-12-22 07:17:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 2985. [2020-12-22 07:17:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-12-22 07:17:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 4798 transitions. [2020-12-22 07:17:37,749 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 4798 transitions. Word has length 66 [2020-12-22 07:17:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:37,750 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 4798 transitions. [2020-12-22 07:17:37,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 4798 transitions. [2020-12-22 07:17:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:17:37,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:37,752 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] [2020-12-22 07:17:37,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:17:37,753 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:37,753 INFO L82 PathProgramCache]: Analyzing trace with hash -378063148, now seen corresponding path program 1 times [2020-12-22 07:17:37,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:37,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851061190] [2020-12-22 07:17:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:37,829 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 07:17:37,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851061190] [2020-12-22 07:17:37,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:37,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:37,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913424826] [2020-12-22 07:17:37,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:37,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:37,832 INFO L87 Difference]: Start difference. First operand 2985 states and 4798 transitions. Second operand 3 states. [2020-12-22 07:17:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:37,991 INFO L93 Difference]: Finished difference Result 6816 states and 10970 transitions. [2020-12-22 07:17:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:37,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:17:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:38,016 INFO L225 Difference]: With dead ends: 6816 [2020-12-22 07:17:38,016 INFO L226 Difference]: Without dead ends: 4694 [2020-12-22 07:17:38,021 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 07:17:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2020-12-22 07:17:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4692. [2020-12-22 07:17:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4692 states. [2020-12-22 07:17:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 7480 transitions. [2020-12-22 07:17:38,270 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 7480 transitions. Word has length 66 [2020-12-22 07:17:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:38,270 INFO L481 AbstractCegarLoop]: Abstraction has 4692 states and 7480 transitions. [2020-12-22 07:17:38,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 7480 transitions. [2020-12-22 07:17:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:17:38,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:38,272 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] [2020-12-22 07:17:38,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:17:38,273 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1715532573, now seen corresponding path program 1 times [2020-12-22 07:17:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:38,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111262737] [2020-12-22 07:17:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:38,329 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 07:17:38,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111262737] [2020-12-22 07:17:38,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:38,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:38,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540519722] [2020-12-22 07:17:38,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:38,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:38,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:38,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:38,332 INFO L87 Difference]: Start difference. First operand 4692 states and 7480 transitions. Second operand 3 states. [2020-12-22 07:17:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:38,572 INFO L93 Difference]: Finished difference Result 10280 states and 16458 transitions. [2020-12-22 07:17:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:38,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:17:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:38,608 INFO L225 Difference]: With dead ends: 10280 [2020-12-22 07:17:38,608 INFO L226 Difference]: Without dead ends: 6977 [2020-12-22 07:17:38,616 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 07:17:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6977 states. [2020-12-22 07:17:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6977 to 6975. [2020-12-22 07:17:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6975 states. [2020-12-22 07:17:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6975 states to 6975 states and 11065 transitions. [2020-12-22 07:17:38,974 INFO L78 Accepts]: Start accepts. Automaton has 6975 states and 11065 transitions. Word has length 66 [2020-12-22 07:17:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:38,974 INFO L481 AbstractCegarLoop]: Abstraction has 6975 states and 11065 transitions. [2020-12-22 07:17:38,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6975 states and 11065 transitions. [2020-12-22 07:17:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:17:38,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:38,976 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] [2020-12-22 07:17:38,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:17:38,976 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:38,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1204542386, now seen corresponding path program 1 times [2020-12-22 07:17:38,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:38,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393556239] [2020-12-22 07:17:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:17:39,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393556239] [2020-12-22 07:17:39,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:39,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:39,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773045367] [2020-12-22 07:17:39,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:39,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:39,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:39,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:39,030 INFO L87 Difference]: Start difference. First operand 6975 states and 11065 transitions. Second operand 3 states. [2020-12-22 07:17:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:39,433 INFO L93 Difference]: Finished difference Result 15549 states and 24946 transitions. [2020-12-22 07:17:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:39,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:17:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:39,466 INFO L225 Difference]: With dead ends: 15549 [2020-12-22 07:17:39,466 INFO L226 Difference]: Without dead ends: 10462 [2020-12-22 07:17:39,476 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 07:17:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10462 states. [2020-12-22 07:17:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10462 to 10460. [2020-12-22 07:17:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10460 states. [2020-12-22 07:17:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10460 states to 10460 states and 16569 transitions. [2020-12-22 07:17:40,020 INFO L78 Accepts]: Start accepts. Automaton has 10460 states and 16569 transitions. Word has length 66 [2020-12-22 07:17:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:40,020 INFO L481 AbstractCegarLoop]: Abstraction has 10460 states and 16569 transitions. [2020-12-22 07:17:40,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10460 states and 16569 transitions. [2020-12-22 07:17:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:17:40,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:40,022 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] [2020-12-22 07:17:40,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:17:40,022 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:40,023 INFO L82 PathProgramCache]: Analyzing trace with hash 760246741, now seen corresponding path program 1 times [2020-12-22 07:17:40,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:40,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764398393] [2020-12-22 07:17:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:40,134 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 07:17:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764398393] [2020-12-22 07:17:40,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:40,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:40,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288247748] [2020-12-22 07:17:40,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:40,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:40,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:40,137 INFO L87 Difference]: Start difference. First operand 10460 states and 16569 transitions. Second operand 5 states. [2020-12-22 07:17:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:40,665 INFO L93 Difference]: Finished difference Result 20849 states and 33040 transitions. [2020-12-22 07:17:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:17:40,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 07:17:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:40,690 INFO L225 Difference]: With dead ends: 20849 [2020-12-22 07:17:40,691 INFO L226 Difference]: Without dead ends: 10462 [2020-12-22 07:17:40,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:17:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10462 states. [2020-12-22 07:17:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10462 to 10460. [2020-12-22 07:17:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10460 states. [2020-12-22 07:17:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10460 states to 10460 states and 16444 transitions. [2020-12-22 07:17:41,189 INFO L78 Accepts]: Start accepts. Automaton has 10460 states and 16444 transitions. Word has length 68 [2020-12-22 07:17:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:41,189 INFO L481 AbstractCegarLoop]: Abstraction has 10460 states and 16444 transitions. [2020-12-22 07:17:41,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 10460 states and 16444 transitions. [2020-12-22 07:17:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:17:41,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:41,190 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] [2020-12-22 07:17:41,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:17:41,191 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1443931136, now seen corresponding path program 1 times [2020-12-22 07:17:41,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:41,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823257898] [2020-12-22 07:17:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:41,315 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 07:17:41,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823257898] [2020-12-22 07:17:41,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:41,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:41,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552788131] [2020-12-22 07:17:41,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:41,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:41,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:41,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:41,317 INFO L87 Difference]: Start difference. First operand 10460 states and 16444 transitions. Second operand 5 states. [2020-12-22 07:17:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:42,620 INFO L93 Difference]: Finished difference Result 37459 states and 59199 transitions. [2020-12-22 07:17:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:17:42,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-12-22 07:17:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:42,690 INFO L225 Difference]: With dead ends: 37459 [2020-12-22 07:17:42,690 INFO L226 Difference]: Without dead ends: 27072 [2020-12-22 07:17:42,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27072 states. [2020-12-22 07:17:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27072 to 19594. [2020-12-22 07:17:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19594 states. [2020-12-22 07:17:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 30545 transitions. [2020-12-22 07:17:43,885 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 30545 transitions. Word has length 71 [2020-12-22 07:17:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:43,885 INFO L481 AbstractCegarLoop]: Abstraction has 19594 states and 30545 transitions. [2020-12-22 07:17:43,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 30545 transitions. [2020-12-22 07:17:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:17:43,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:43,886 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] [2020-12-22 07:17:43,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:17:43,887 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:43,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2054199358, now seen corresponding path program 1 times [2020-12-22 07:17:43,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:43,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343368811] [2020-12-22 07:17:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:44,022 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 07:17:44,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343368811] [2020-12-22 07:17:44,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:44,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:17:44,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86959598] [2020-12-22 07:17:44,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:17:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:17:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:17:44,025 INFO L87 Difference]: Start difference. First operand 19594 states and 30545 transitions. Second operand 8 states. [2020-12-22 07:17:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:45,962 INFO L93 Difference]: Finished difference Result 39181 states and 60333 transitions. [2020-12-22 07:17:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:17:45,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-12-22 07:17:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:46,079 INFO L225 Difference]: With dead ends: 39181 [2020-12-22 07:17:46,079 INFO L226 Difference]: Without dead ends: 39179 [2020-12-22 07:17:46,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:17:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39179 states. [2020-12-22 07:17:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39179 to 20728. [2020-12-22 07:17:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20728 states. [2020-12-22 07:17:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20728 states to 20728 states and 31670 transitions. [2020-12-22 07:17:47,231 INFO L78 Accepts]: Start accepts. Automaton has 20728 states and 31670 transitions. Word has length 72 [2020-12-22 07:17:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:47,231 INFO L481 AbstractCegarLoop]: Abstraction has 20728 states and 31670 transitions. [2020-12-22 07:17:47,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:17:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20728 states and 31670 transitions. [2020-12-22 07:17:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:17:47,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:47,234 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:47,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:17:47,235 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:47,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1822275862, now seen corresponding path program 1 times [2020-12-22 07:17:47,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:47,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475406868] [2020-12-22 07:17:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:17:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475406868] [2020-12-22 07:17:47,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:47,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:47,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773325399] [2020-12-22 07:17:47,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:47,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:47,322 INFO L87 Difference]: Start difference. First operand 20728 states and 31670 transitions. Second operand 5 states. [2020-12-22 07:17:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:48,537 INFO L93 Difference]: Finished difference Result 40736 states and 62686 transitions. [2020-12-22 07:17:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:17:48,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-12-22 07:17:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:48,616 INFO L225 Difference]: With dead ends: 40736 [2020-12-22 07:17:48,616 INFO L226 Difference]: Without dead ends: 30894 [2020-12-22 07:17:48,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:17:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30894 states. [2020-12-22 07:17:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30894 to 26348. [2020-12-22 07:17:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26348 states. [2020-12-22 07:17:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26348 states to 26348 states and 40344 transitions. [2020-12-22 07:17:49,994 INFO L78 Accepts]: Start accepts. Automaton has 26348 states and 40344 transitions. Word has length 98 [2020-12-22 07:17:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:49,994 INFO L481 AbstractCegarLoop]: Abstraction has 26348 states and 40344 transitions. [2020-12-22 07:17:49,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 26348 states and 40344 transitions. [2020-12-22 07:17:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:17:49,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:49,998 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:49,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:17:49,998 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 484806437, now seen corresponding path program 1 times [2020-12-22 07:17:49,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:50,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990964331] [2020-12-22 07:17:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:17:50,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990964331] [2020-12-22 07:17:50,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:50,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:50,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453733123] [2020-12-22 07:17:50,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:50,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:50,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:50,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:50,086 INFO L87 Difference]: Start difference. First operand 26348 states and 40344 transitions. Second operand 5 states. [2020-12-22 07:17:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:51,652 INFO L93 Difference]: Finished difference Result 42720 states and 65762 transitions. [2020-12-22 07:17:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:17:51,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-12-22 07:17:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:51,715 INFO L225 Difference]: With dead ends: 42720 [2020-12-22 07:17:51,715 INFO L226 Difference]: Without dead ends: 32878 [2020-12-22 07:17:51,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:17:51,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32878 states. [2020-12-22 07:17:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32878 to 32056. [2020-12-22 07:17:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32056 states. [2020-12-22 07:17:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32056 states to 32056 states and 49180 transitions. [2020-12-22 07:17:53,366 INFO L78 Accepts]: Start accepts. Automaton has 32056 states and 49180 transitions. Word has length 98 [2020-12-22 07:17:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:53,366 INFO L481 AbstractCegarLoop]: Abstraction has 32056 states and 49180 transitions. [2020-12-22 07:17:53,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32056 states and 49180 transitions. [2020-12-22 07:17:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:17:53,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:53,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:53,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:17:53,370 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash -890085900, now seen corresponding path program 1 times [2020-12-22 07:17:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113147329] [2020-12-22 07:17:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:17:53,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113147329] [2020-12-22 07:17:53,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:53,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:53,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144503581] [2020-12-22 07:17:53,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:53,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:53,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:53,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:53,462 INFO L87 Difference]: Start difference. First operand 32056 states and 49180 transitions. Second operand 5 states. [2020-12-22 07:17:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:55,098 INFO L93 Difference]: Finished difference Result 46188 states and 71292 transitions. [2020-12-22 07:17:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:17:55,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-12-22 07:17:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:55,155 INFO L225 Difference]: With dead ends: 46188 [2020-12-22 07:17:55,155 INFO L226 Difference]: Without dead ends: 36126 [2020-12-22 07:17:55,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:17:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36126 states. [2020-12-22 07:17:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36126 to 35304. [2020-12-22 07:17:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35304 states. [2020-12-22 07:17:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35304 states to 35304 states and 54280 transitions. [2020-12-22 07:17:57,129 INFO L78 Accepts]: Start accepts. Automaton has 35304 states and 54280 transitions. Word has length 98 [2020-12-22 07:17:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:57,130 INFO L481 AbstractCegarLoop]: Abstraction has 35304 states and 54280 transitions. [2020-12-22 07:17:57,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 35304 states and 54280 transitions. [2020-12-22 07:17:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:17:57,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:57,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:57,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:17:57,134 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash 549275512, now seen corresponding path program 1 times [2020-12-22 07:17:57,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:57,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812490106] [2020-12-22 07:17:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:17:57,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812490106] [2020-12-22 07:17:57,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:57,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:57,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585193444] [2020-12-22 07:17:57,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:57,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:57,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:57,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:57,226 INFO L87 Difference]: Start difference. First operand 35304 states and 54280 transitions. Second operand 4 states. [2020-12-22 07:17:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:59,193 INFO L93 Difference]: Finished difference Result 55138 states and 85355 transitions. [2020-12-22 07:17:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:59,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-12-22 07:17:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:59,242 INFO L225 Difference]: With dead ends: 55138 [2020-12-22 07:17:59,243 INFO L226 Difference]: Without dead ends: 41828 [2020-12-22 07:17:59,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 07:17:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41828 states. [2020-12-22 07:18:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41828 to 40208. [2020-12-22 07:18:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40208 states. [2020-12-22 07:18:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40208 states to 40208 states and 61860 transitions. [2020-12-22 07:18:01,076 INFO L78 Accepts]: Start accepts. Automaton has 40208 states and 61860 transitions. Word has length 99 [2020-12-22 07:18:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:01,077 INFO L481 AbstractCegarLoop]: Abstraction has 40208 states and 61860 transitions. [2020-12-22 07:18:01,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40208 states and 61860 transitions. [2020-12-22 07:18:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:18:01,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:01,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:01,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:18:01,081 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 971977338, now seen corresponding path program 1 times [2020-12-22 07:18:01,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:01,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665000313] [2020-12-22 07:18:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:18:01,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665000313] [2020-12-22 07:18:01,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:01,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:01,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311467124] [2020-12-22 07:18:01,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:01,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:01,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:01,159 INFO L87 Difference]: Start difference. First operand 40208 states and 61860 transitions. Second operand 3 states. [2020-12-22 07:18:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:03,775 INFO L93 Difference]: Finished difference Result 83760 states and 129608 transitions. [2020-12-22 07:18:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:03,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 07:18:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:03,859 INFO L225 Difference]: With dead ends: 83760 [2020-12-22 07:18:03,859 INFO L226 Difference]: Without dead ends: 68957 [2020-12-22 07:18:03,879 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 07:18:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68957 states. [2020-12-22 07:18:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68957 to 68768. [2020-12-22 07:18:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68768 states. [2020-12-22 07:18:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68768 states to 68768 states and 105890 transitions. [2020-12-22 07:18:06,971 INFO L78 Accepts]: Start accepts. Automaton has 68768 states and 105890 transitions. Word has length 99 [2020-12-22 07:18:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:06,971 INFO L481 AbstractCegarLoop]: Abstraction has 68768 states and 105890 transitions. [2020-12-22 07:18:06,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 68768 states and 105890 transitions. [2020-12-22 07:18:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:18:06,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:06,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:06,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:18:06,975 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash 810419356, now seen corresponding path program 1 times [2020-12-22 07:18:06,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:06,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748030716] [2020-12-22 07:18:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:18:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748030716] [2020-12-22 07:18:07,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:07,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:18:07,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921465702] [2020-12-22 07:18:07,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:18:07,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:18:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:07,053 INFO L87 Difference]: Start difference. First operand 68768 states and 105890 transitions. Second operand 4 states. [2020-12-22 07:18:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:10,370 INFO L93 Difference]: Finished difference Result 101592 states and 157123 transitions. [2020-12-22 07:18:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:18:10,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-12-22 07:18:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:10,471 INFO L225 Difference]: With dead ends: 101592 [2020-12-22 07:18:10,471 INFO L226 Difference]: Without dead ends: 78892 [2020-12-22 07:18:10,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 07:18:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78892 states. [2020-12-22 07:18:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78892 to 74052. [2020-12-22 07:18:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74052 states. [2020-12-22 07:18:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74052 states to 74052 states and 114036 transitions. [2020-12-22 07:18:14,025 INFO L78 Accepts]: Start accepts. Automaton has 74052 states and 114036 transitions. Word has length 100 [2020-12-22 07:18:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:14,025 INFO L481 AbstractCegarLoop]: Abstraction has 74052 states and 114036 transitions. [2020-12-22 07:18:14,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74052 states and 114036 transitions. [2020-12-22 07:18:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:18:14,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:14,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:14,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:18:14,035 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -210648998, now seen corresponding path program 1 times [2020-12-22 07:18:14,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:14,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631935607] [2020-12-22 07:18:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:18:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631935607] [2020-12-22 07:18:14,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:14,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:14,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720040620] [2020-12-22 07:18:14,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:14,092 INFO L87 Difference]: Start difference. First operand 74052 states and 114036 transitions. Second operand 3 states. [2020-12-22 07:18:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:18,916 INFO L93 Difference]: Finished difference Result 152700 states and 235966 transitions. [2020-12-22 07:18:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:18,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:18:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:19,129 INFO L225 Difference]: With dead ends: 152700 [2020-12-22 07:18:19,129 INFO L226 Difference]: Without dead ends: 123027 [2020-12-22 07:18:19,166 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 07:18:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123027 states. [2020-12-22 07:18:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123027 to 122698. [2020-12-22 07:18:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122698 states. [2020-12-22 07:18:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122698 states to 122698 states and 188738 transitions. [2020-12-22 07:18:25,120 INFO L78 Accepts]: Start accepts. Automaton has 122698 states and 188738 transitions. Word has length 100 [2020-12-22 07:18:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:25,120 INFO L481 AbstractCegarLoop]: Abstraction has 122698 states and 188738 transitions. [2020-12-22 07:18:25,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 122698 states and 188738 transitions. [2020-12-22 07:18:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:18:25,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:25,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:25,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:18:25,125 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1372371469, now seen corresponding path program 1 times [2020-12-22 07:18:25,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:25,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195996177] [2020-12-22 07:18:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:18:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195996177] [2020-12-22 07:18:25,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:25,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:25,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970369597] [2020-12-22 07:18:25,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:25,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:25,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:25,216 INFO L87 Difference]: Start difference. First operand 122698 states and 188738 transitions. Second operand 3 states. [2020-12-22 07:18:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:34,819 INFO L93 Difference]: Finished difference Result 364021 states and 559550 transitions. [2020-12-22 07:18:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:34,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:18:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:35,446 INFO L225 Difference]: With dead ends: 364021 [2020-12-22 07:18:35,446 INFO L226 Difference]: Without dead ends: 241396 [2020-12-22 07:18:35,561 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 07:18:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241396 states. [2020-12-22 07:18:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241396 to 241394. [2020-12-22 07:18:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241394 states. [2020-12-22 07:18:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241394 states to 241394 states and 368354 transitions. [2020-12-22 07:18:46,982 INFO L78 Accepts]: Start accepts. Automaton has 241394 states and 368354 transitions. Word has length 100 [2020-12-22 07:18:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:46,983 INFO L481 AbstractCegarLoop]: Abstraction has 241394 states and 368354 transitions. [2020-12-22 07:18:46,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 241394 states and 368354 transitions. [2020-12-22 07:18:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:18:46,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:46,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:46,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:18:46,989 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:46,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:46,990 INFO L82 PathProgramCache]: Analyzing trace with hash 597349977, now seen corresponding path program 1 times [2020-12-22 07:18:46,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:46,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758383182] [2020-12-22 07:18:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:18:47,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758383182] [2020-12-22 07:18:47,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:47,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:47,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877953148] [2020-12-22 07:18:47,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:47,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:47,061 INFO L87 Difference]: Start difference. First operand 241394 states and 368354 transitions. Second operand 3 states. [2020-12-22 07:19:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:07,109 INFO L93 Difference]: Finished difference Result 716438 states and 1092336 transitions. [2020-12-22 07:19:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:07,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:19:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:08,424 INFO L225 Difference]: With dead ends: 716438 [2020-12-22 07:19:08,424 INFO L226 Difference]: Without dead ends: 475161 [2020-12-22 07:19:08,678 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 07:19:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475161 states.