/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:43:29,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:43:29,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:43:29,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:43:29,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:43:29,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:43:29,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:43:29,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:43:29,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:43:29,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:43:29,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:43:29,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:43:29,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:43:29,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:43:29,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:43:29,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:43:29,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:43:29,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:43:29,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:43:29,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:43:29,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:43:29,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:43:29,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:43:29,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:43:29,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:43:29,697 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:43:29,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:43:29,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:43:29,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:43:29,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:43:29,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:43:29,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:43:29,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:43:29,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:43:29,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:43:29,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:43:29,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:43:29,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:43:29,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:43:29,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:43:29,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:43:29,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:43:29,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:43:29,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:43:29,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:43:29,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:43:29,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:43:30,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:43:30,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:43:30,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:43:30,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:43:30,194 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:43:30,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:30,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8b8c0739/21b4fe9dfa2b4a4f907b782e5b05cc7c/FLAG8072bd9e5 [2020-12-22 07:43:31,095 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:43:31,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:31,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8b8c0739/21b4fe9dfa2b4a4f907b782e5b05cc7c/FLAG8072bd9e5 [2020-12-22 07:43:31,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8b8c0739/21b4fe9dfa2b4a4f907b782e5b05cc7c [2020-12-22 07:43:31,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:43:31,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:43:31,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:31,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:43:31,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:43:31,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:31" (1/1) ... [2020-12-22 07:43:31,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9487b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:31, skipping insertion in model container [2020-12-22 07:43:31,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:31" (1/1) ... [2020-12-22 07:43:31,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:43:31,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:43:31,864 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c[31211,31224] [2020-12-22 07:43:31,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:31,881 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:43:32,016 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c[31211,31224] [2020-12-22 07:43:32,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:32,068 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:43:32,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32 WrapperNode [2020-12-22 07:43:32,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:32,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:32,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:43:32,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:43:32,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:32,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:43:32,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:43:32,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:43:32,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (1/1) ... [2020-12-22 07:43:32,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:43:32,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:43:32,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:43:32,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:43:32,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (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 07:43:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:43:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:43:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:43:32,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:43:33,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:43:33,726 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:43:33,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:33 BoogieIcfgContainer [2020-12-22 07:43:33,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:43:33,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:43:33,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:43:33,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:43:33,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:43:31" (1/3) ... [2020-12-22 07:43:33,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409a82a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:33, skipping insertion in model container [2020-12-22 07:43:33,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:32" (2/3) ... [2020-12-22 07:43:33,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409a82a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:33, skipping insertion in model container [2020-12-22 07:43:33,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:33" (3/3) ... [2020-12-22 07:43:33,737 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:33,743 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:43:33,748 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:43:33,768 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:43:33,797 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:43:33,797 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:43:33,797 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:43:33,797 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:43:33,797 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:43:33,797 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:43:33,798 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:43:33,798 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:43:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states. [2020-12-22 07:43:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:33,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:33,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:33,838 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash 623353910, now seen corresponding path program 1 times [2020-12-22 07:43:33,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:33,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575429156] [2020-12-22 07:43:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:34,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575429156] [2020-12-22 07:43:34,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:34,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:43:34,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814078020] [2020-12-22 07:43:34,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:43:34,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:43:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:34,270 INFO L87 Difference]: Start difference. First operand 332 states. Second operand 2 states. [2020-12-22 07:43:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:34,318 INFO L93 Difference]: Finished difference Result 465 states and 825 transitions. [2020-12-22 07:43:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:43:34,320 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:43:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:34,337 INFO L225 Difference]: With dead ends: 465 [2020-12-22 07:43:34,337 INFO L226 Difference]: Without dead ends: 328 [2020-12-22 07:43:34,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-22 07:43:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2020-12-22 07:43:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 07:43:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 588 transitions. [2020-12-22 07:43:34,408 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 588 transitions. Word has length 77 [2020-12-22 07:43:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:34,409 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 588 transitions. [2020-12-22 07:43:34,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:43:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 588 transitions. [2020-12-22 07:43:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:34,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:34,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:34,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:43:34,415 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash 489340404, now seen corresponding path program 1 times [2020-12-22 07:43:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:34,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191367594] [2020-12-22 07:43:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:34,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191367594] [2020-12-22 07:43:34,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:34,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:43:34,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138241330] [2020-12-22 07:43:34,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:43:34,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:34,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:43:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:34,706 INFO L87 Difference]: Start difference. First operand 328 states and 588 transitions. Second operand 5 states. [2020-12-22 07:43:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:34,887 INFO L93 Difference]: Finished difference Result 464 states and 818 transitions. [2020-12-22 07:43:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:43:34,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:43:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:34,896 INFO L225 Difference]: With dead ends: 464 [2020-12-22 07:43:34,897 INFO L226 Difference]: Without dead ends: 328 [2020-12-22 07:43:34,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:43:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-22 07:43:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2020-12-22 07:43:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 07:43:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 542 transitions. [2020-12-22 07:43:34,951 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 542 transitions. Word has length 77 [2020-12-22 07:43:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:34,951 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 542 transitions. [2020-12-22 07:43:34,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 542 transitions. [2020-12-22 07:43:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:43:34,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:34,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:34,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:43:34,966 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:34,967 INFO L82 PathProgramCache]: Analyzing trace with hash 268932394, now seen corresponding path program 1 times [2020-12-22 07:43:34,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:34,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102943071] [2020-12-22 07:43:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:35,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102943071] [2020-12-22 07:43:35,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:35,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:35,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158669732] [2020-12-22 07:43:35,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:35,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:35,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:35,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:35,209 INFO L87 Difference]: Start difference. First operand 328 states and 542 transitions. Second operand 3 states. [2020-12-22 07:43:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:35,276 INFO L93 Difference]: Finished difference Result 580 states and 972 transitions. [2020-12-22 07:43:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:35,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 07:43:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:35,282 INFO L225 Difference]: With dead ends: 580 [2020-12-22 07:43:35,283 INFO L226 Difference]: Without dead ends: 448 [2020-12-22 07:43:35,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-12-22 07:43:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 445. [2020-12-22 07:43:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-12-22 07:43:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 738 transitions. [2020-12-22 07:43:35,314 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 738 transitions. Word has length 122 [2020-12-22 07:43:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:35,315 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 738 transitions. [2020-12-22 07:43:35,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 738 transitions. [2020-12-22 07:43:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:43:35,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:35,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:35,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:43:35,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:35,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2041791286, now seen corresponding path program 1 times [2020-12-22 07:43:35,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:35,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127143980] [2020-12-22 07:43:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127143980] [2020-12-22 07:43:35,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:35,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:35,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445045399] [2020-12-22 07:43:35,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:35,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:35,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:35,547 INFO L87 Difference]: Start difference. First operand 445 states and 738 transitions. Second operand 3 states. [2020-12-22 07:43:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:35,598 INFO L93 Difference]: Finished difference Result 923 states and 1546 transitions. [2020-12-22 07:43:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:35,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 07:43:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:35,606 INFO L225 Difference]: With dead ends: 923 [2020-12-22 07:43:35,606 INFO L226 Difference]: Without dead ends: 674 [2020-12-22 07:43:35,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2020-12-22 07:43:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 670. [2020-12-22 07:43:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-12-22 07:43:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1117 transitions. [2020-12-22 07:43:35,649 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1117 transitions. Word has length 125 [2020-12-22 07:43:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:35,650 INFO L481 AbstractCegarLoop]: Abstraction has 670 states and 1117 transitions. [2020-12-22 07:43:35,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1117 transitions. [2020-12-22 07:43:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:43:35,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:35,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:35,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:43:35,654 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:35,655 INFO L82 PathProgramCache]: Analyzing trace with hash 703648971, now seen corresponding path program 1 times [2020-12-22 07:43:35,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:35,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324646790] [2020-12-22 07:43:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:35,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324646790] [2020-12-22 07:43:35,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:35,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:35,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023448848] [2020-12-22 07:43:35,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:35,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:35,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:35,937 INFO L87 Difference]: Start difference. First operand 670 states and 1117 transitions. Second operand 3 states. [2020-12-22 07:43:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:36,028 INFO L93 Difference]: Finished difference Result 1578 states and 2647 transitions. [2020-12-22 07:43:36,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:36,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 07:43:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:36,041 INFO L225 Difference]: With dead ends: 1578 [2020-12-22 07:43:36,041 INFO L226 Difference]: Without dead ends: 1104 [2020-12-22 07:43:36,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2020-12-22 07:43:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1098. [2020-12-22 07:43:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-12-22 07:43:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1833 transitions. [2020-12-22 07:43:36,100 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1833 transitions. Word has length 128 [2020-12-22 07:43:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:36,100 INFO L481 AbstractCegarLoop]: Abstraction has 1098 states and 1833 transitions. [2020-12-22 07:43:36,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1833 transitions. [2020-12-22 07:43:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:43:36,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:36,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:36,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:43:36,107 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1474863799, now seen corresponding path program 1 times [2020-12-22 07:43:36,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:36,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437183632] [2020-12-22 07:43:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:36,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437183632] [2020-12-22 07:43:36,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:36,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:36,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464360212] [2020-12-22 07:43:36,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:36,313 INFO L87 Difference]: Start difference. First operand 1098 states and 1833 transitions. Second operand 3 states. [2020-12-22 07:43:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:36,384 INFO L93 Difference]: Finished difference Result 2822 states and 4723 transitions. [2020-12-22 07:43:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:36,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:43:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:36,396 INFO L225 Difference]: With dead ends: 2822 [2020-12-22 07:43:36,397 INFO L226 Difference]: Without dead ends: 1920 [2020-12-22 07:43:36,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-12-22 07:43:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1910. [2020-12-22 07:43:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1910 states. [2020-12-22 07:43:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3173 transitions. [2020-12-22 07:43:36,469 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3173 transitions. Word has length 131 [2020-12-22 07:43:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:36,469 INFO L481 AbstractCegarLoop]: Abstraction has 1910 states and 3173 transitions. [2020-12-22 07:43:36,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3173 transitions. [2020-12-22 07:43:36,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:43:36,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:36,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:36,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:43:36,474 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1321209626, now seen corresponding path program 1 times [2020-12-22 07:43:36,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:36,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22434197] [2020-12-22 07:43:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:36,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22434197] [2020-12-22 07:43:36,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:36,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:43:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495653749] [2020-12-22 07:43:36,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:43:36,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:43:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:36,875 INFO L87 Difference]: Start difference. First operand 1910 states and 3173 transitions. Second operand 6 states. [2020-12-22 07:43:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:37,137 INFO L93 Difference]: Finished difference Result 7192 states and 12058 transitions. [2020-12-22 07:43:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:43:37,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 07:43:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:37,169 INFO L225 Difference]: With dead ends: 7192 [2020-12-22 07:43:37,169 INFO L226 Difference]: Without dead ends: 5478 [2020-12-22 07:43:37,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2020-12-22 07:43:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 3510. [2020-12-22 07:43:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3510 states. [2020-12-22 07:43:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 5838 transitions. [2020-12-22 07:43:37,396 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 5838 transitions. Word has length 134 [2020-12-22 07:43:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:37,397 INFO L481 AbstractCegarLoop]: Abstraction has 3510 states and 5838 transitions. [2020-12-22 07:43:37,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:43:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 5838 transitions. [2020-12-22 07:43:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:43:37,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:37,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:37,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:43:37,403 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:37,403 INFO L82 PathProgramCache]: Analyzing trace with hash -102431977, now seen corresponding path program 1 times [2020-12-22 07:43:37,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:37,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510908737] [2020-12-22 07:43:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:37,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510908737] [2020-12-22 07:43:37,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:37,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:37,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325237571] [2020-12-22 07:43:37,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:37,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:37,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:37,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:37,662 INFO L87 Difference]: Start difference. First operand 3510 states and 5838 transitions. Second operand 4 states. [2020-12-22 07:43:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:37,889 INFO L93 Difference]: Finished difference Result 10363 states and 17345 transitions. [2020-12-22 07:43:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:37,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:43:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:37,927 INFO L225 Difference]: With dead ends: 10363 [2020-12-22 07:43:37,927 INFO L226 Difference]: Without dead ends: 7049 [2020-12-22 07:43:37,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7049 states. [2020-12-22 07:43:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7049 to 5214. [2020-12-22 07:43:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5214 states. [2020-12-22 07:43:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 8689 transitions. [2020-12-22 07:43:38,179 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 8689 transitions. Word has length 135 [2020-12-22 07:43:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:38,180 INFO L481 AbstractCegarLoop]: Abstraction has 5214 states and 8689 transitions. [2020-12-22 07:43:38,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 8689 transitions. [2020-12-22 07:43:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:38,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:38,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:38,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:43:38,185 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash -806026179, now seen corresponding path program 1 times [2020-12-22 07:43:38,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:38,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081848356] [2020-12-22 07:43:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:38,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081848356] [2020-12-22 07:43:38,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:38,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:38,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326914198] [2020-12-22 07:43:38,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:38,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:38,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:38,365 INFO L87 Difference]: Start difference. First operand 5214 states and 8689 transitions. Second operand 4 states. [2020-12-22 07:43:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:38,686 INFO L93 Difference]: Finished difference Result 15494 states and 25898 transitions. [2020-12-22 07:43:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:38,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 07:43:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:38,753 INFO L225 Difference]: With dead ends: 15494 [2020-12-22 07:43:38,753 INFO L226 Difference]: Without dead ends: 10476 [2020-12-22 07:43:38,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10476 states. [2020-12-22 07:43:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10476 to 7722. [2020-12-22 07:43:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7722 states. [2020-12-22 07:43:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7722 states to 7722 states and 12855 transitions. [2020-12-22 07:43:39,285 INFO L78 Accepts]: Start accepts. Automaton has 7722 states and 12855 transitions. Word has length 136 [2020-12-22 07:43:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:39,286 INFO L481 AbstractCegarLoop]: Abstraction has 7722 states and 12855 transitions. [2020-12-22 07:43:39,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7722 states and 12855 transitions. [2020-12-22 07:43:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:43:39,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:39,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:39,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:43:39,292 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash -973605618, now seen corresponding path program 1 times [2020-12-22 07:43:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:39,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400580000] [2020-12-22 07:43:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:39,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400580000] [2020-12-22 07:43:39,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:39,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:39,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97590236] [2020-12-22 07:43:39,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:39,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:39,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:39,489 INFO L87 Difference]: Start difference. First operand 7722 states and 12855 transitions. Second operand 4 states. [2020-12-22 07:43:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:39,912 INFO L93 Difference]: Finished difference Result 22712 states and 37920 transitions. [2020-12-22 07:43:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:39,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-12-22 07:43:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:39,958 INFO L225 Difference]: With dead ends: 22712 [2020-12-22 07:43:39,958 INFO L226 Difference]: Without dead ends: 15186 [2020-12-22 07:43:39,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15186 states. [2020-12-22 07:43:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15186 to 11420. [2020-12-22 07:43:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11420 states. [2020-12-22 07:43:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11420 states to 11420 states and 18989 transitions. [2020-12-22 07:43:40,584 INFO L78 Accepts]: Start accepts. Automaton has 11420 states and 18989 transitions. Word has length 137 [2020-12-22 07:43:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:40,584 INFO L481 AbstractCegarLoop]: Abstraction has 11420 states and 18989 transitions. [2020-12-22 07:43:40,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 11420 states and 18989 transitions. [2020-12-22 07:43:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:40,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:40,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:40,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:43:40,612 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1704596588, now seen corresponding path program 1 times [2020-12-22 07:43:40,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:40,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655316720] [2020-12-22 07:43:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:40,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655316720] [2020-12-22 07:43:40,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:40,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:40,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385652209] [2020-12-22 07:43:40,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:40,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:40,800 INFO L87 Difference]: Start difference. First operand 11420 states and 18989 transitions. Second operand 4 states. [2020-12-22 07:43:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:41,334 INFO L93 Difference]: Finished difference Result 34376 states and 57348 transitions. [2020-12-22 07:43:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:41,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:43:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:41,400 INFO L225 Difference]: With dead ends: 34376 [2020-12-22 07:43:41,400 INFO L226 Difference]: Without dead ends: 23152 [2020-12-22 07:43:41,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23152 states. [2020-12-22 07:43:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23152 to 16802. [2020-12-22 07:43:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16802 states. [2020-12-22 07:43:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16802 states to 16802 states and 27923 transitions. [2020-12-22 07:43:42,382 INFO L78 Accepts]: Start accepts. Automaton has 16802 states and 27923 transitions. Word has length 138 [2020-12-22 07:43:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:42,382 INFO L481 AbstractCegarLoop]: Abstraction has 16802 states and 27923 transitions. [2020-12-22 07:43:42,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 16802 states and 27923 transitions. [2020-12-22 07:43:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:42,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:42,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:42,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:43:42,390 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:42,391 INFO L82 PathProgramCache]: Analyzing trace with hash 129894331, now seen corresponding path program 1 times [2020-12-22 07:43:42,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:42,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423927076] [2020-12-22 07:43:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:42,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423927076] [2020-12-22 07:43:42,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:42,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:42,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739029572] [2020-12-22 07:43:42,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:42,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:42,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:42,582 INFO L87 Difference]: Start difference. First operand 16802 states and 27923 transitions. Second operand 3 states. [2020-12-22 07:43:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:43,217 INFO L93 Difference]: Finished difference Result 37806 states and 62839 transitions. [2020-12-22 07:43:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:43,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:43,299 INFO L225 Difference]: With dead ends: 37806 [2020-12-22 07:43:43,299 INFO L226 Difference]: Without dead ends: 26108 [2020-12-22 07:43:43,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26108 states. [2020-12-22 07:43:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26108 to 26106. [2020-12-22 07:43:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26106 states. [2020-12-22 07:43:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26106 states to 26106 states and 43195 transitions. [2020-12-22 07:43:44,304 INFO L78 Accepts]: Start accepts. Automaton has 26106 states and 43195 transitions. Word has length 138 [2020-12-22 07:43:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:44,304 INFO L481 AbstractCegarLoop]: Abstraction has 26106 states and 43195 transitions. [2020-12-22 07:43:44,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26106 states and 43195 transitions. [2020-12-22 07:43:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:44,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:44,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:44,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:43:44,310 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash -807858639, now seen corresponding path program 1 times [2020-12-22 07:43:44,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:44,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544845617] [2020-12-22 07:43:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:44,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544845617] [2020-12-22 07:43:44,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:44,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:44,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623772603] [2020-12-22 07:43:44,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:44,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:44,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:44,429 INFO L87 Difference]: Start difference. First operand 26106 states and 43195 transitions. Second operand 3 states. [2020-12-22 07:43:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:45,534 INFO L93 Difference]: Finished difference Result 58040 states and 96093 transitions. [2020-12-22 07:43:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:45,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:45,644 INFO L225 Difference]: With dead ends: 58040 [2020-12-22 07:43:45,645 INFO L226 Difference]: Without dead ends: 39854 [2020-12-22 07:43:45,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39854 states. [2020-12-22 07:43:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39854 to 39852. [2020-12-22 07:43:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39852 states. [2020-12-22 07:43:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39852 states to 39852 states and 65663 transitions. [2020-12-22 07:43:47,159 INFO L78 Accepts]: Start accepts. Automaton has 39852 states and 65663 transitions. Word has length 138 [2020-12-22 07:43:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:47,160 INFO L481 AbstractCegarLoop]: Abstraction has 39852 states and 65663 transitions. [2020-12-22 07:43:47,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 39852 states and 65663 transitions. [2020-12-22 07:43:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:47,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:47,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:47,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:43:47,166 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -332007685, now seen corresponding path program 1 times [2020-12-22 07:43:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:47,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144983530] [2020-12-22 07:43:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:47,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144983530] [2020-12-22 07:43:47,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:47,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:47,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460983359] [2020-12-22 07:43:47,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:47,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:47,316 INFO L87 Difference]: Start difference. First operand 39852 states and 65663 transitions. Second operand 3 states. [2020-12-22 07:43:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:49,186 INFO L93 Difference]: Finished difference Result 89080 states and 147423 transitions. [2020-12-22 07:43:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:49,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:49,397 INFO L225 Difference]: With dead ends: 89080 [2020-12-22 07:43:49,397 INFO L226 Difference]: Without dead ends: 60798 [2020-12-22 07:43:49,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60798 states. [2020-12-22 07:43:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60798 to 60796. [2020-12-22 07:43:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60796 states. [2020-12-22 07:43:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60796 states to 60796 states and 99943 transitions. [2020-12-22 07:43:51,713 INFO L78 Accepts]: Start accepts. Automaton has 60796 states and 99943 transitions. Word has length 138 [2020-12-22 07:43:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:51,714 INFO L481 AbstractCegarLoop]: Abstraction has 60796 states and 99943 transitions. [2020-12-22 07:43:51,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 60796 states and 99943 transitions. [2020-12-22 07:43:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:43:51,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:51,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:51,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:43:51,716 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1686527611, now seen corresponding path program 1 times [2020-12-22 07:43:51,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:51,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89953020] [2020-12-22 07:43:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:51,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89953020] [2020-12-22 07:43:51,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:51,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:51,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937670856] [2020-12-22 07:43:51,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:51,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:51,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:51,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:51,820 INFO L87 Difference]: Start difference. First operand 60796 states and 99943 transitions. Second operand 3 states. [2020-12-22 07:43:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:53,696 INFO L93 Difference]: Finished difference Result 133764 states and 220022 transitions. [2020-12-22 07:43:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:53,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-22 07:43:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:53,921 INFO L225 Difference]: With dead ends: 133764 [2020-12-22 07:43:53,921 INFO L226 Difference]: Without dead ends: 91013 [2020-12-22 07:43:53,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91013 states. [2020-12-22 07:43:56,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91013 to 91011. [2020-12-22 07:43:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91011 states. [2020-12-22 07:43:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91011 states to 91011 states and 148627 transitions. [2020-12-22 07:43:56,589 INFO L78 Accepts]: Start accepts. Automaton has 91011 states and 148627 transitions. Word has length 139 [2020-12-22 07:43:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:56,590 INFO L481 AbstractCegarLoop]: Abstraction has 91011 states and 148627 transitions. [2020-12-22 07:43:56,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 91011 states and 148627 transitions. [2020-12-22 07:43:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:43:56,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:56,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:56,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:43:56,593 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:56,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:56,593 INFO L82 PathProgramCache]: Analyzing trace with hash 344039084, now seen corresponding path program 1 times [2020-12-22 07:43:56,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:56,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010440995] [2020-12-22 07:43:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010440995] [2020-12-22 07:43:56,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:56,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:56,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618008792] [2020-12-22 07:43:56,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:56,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:56,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:56,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:56,806 INFO L87 Difference]: Start difference. First operand 91011 states and 148627 transitions. Second operand 4 states. [2020-12-22 07:44:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:00,847 INFO L93 Difference]: Finished difference Result 270449 states and 441415 transitions. [2020-12-22 07:44:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:00,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:44:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:01,296 INFO L225 Difference]: With dead ends: 270449 [2020-12-22 07:44:01,296 INFO L226 Difference]: Without dead ends: 179449 [2020-12-22 07:44:01,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:44:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179449 states. [2020-12-22 07:44:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179449 to 179447. [2020-12-22 07:44:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179447 states. [2020-12-22 07:44:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179447 states to 179447 states and 291630 transitions. [2020-12-22 07:44:07,098 INFO L78 Accepts]: Start accepts. Automaton has 179447 states and 291630 transitions. Word has length 140 [2020-12-22 07:44:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:07,098 INFO L481 AbstractCegarLoop]: Abstraction has 179447 states and 291630 transitions. [2020-12-22 07:44:07,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 179447 states and 291630 transitions. [2020-12-22 07:44:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:44:07,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:07,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:07,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:44:07,107 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:07,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1510375836, now seen corresponding path program 1 times [2020-12-22 07:44:07,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:07,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625738695] [2020-12-22 07:44:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625738695] [2020-12-22 07:44:07,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:07,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:07,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439723522] [2020-12-22 07:44:07,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:07,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:07,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:07,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:07,200 INFO L87 Difference]: Start difference. First operand 179447 states and 291630 transitions. Second operand 3 states. [2020-12-22 07:44:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:12,655 INFO L93 Difference]: Finished difference Result 435570 states and 710940 transitions. [2020-12-22 07:44:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:12,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-12-22 07:44:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:13,160 INFO L225 Difference]: With dead ends: 435570 [2020-12-22 07:44:13,161 INFO L226 Difference]: Without dead ends: 256521 [2020-12-22 07:44:13,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256521 states. [2020-12-22 07:44:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256521 to 248005. [2020-12-22 07:44:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248005 states. [2020-12-22 07:44:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248005 states to 248005 states and 401319 transitions. [2020-12-22 07:44:20,914 INFO L78 Accepts]: Start accepts. Automaton has 248005 states and 401319 transitions. Word has length 141 [2020-12-22 07:44:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:20,915 INFO L481 AbstractCegarLoop]: Abstraction has 248005 states and 401319 transitions. [2020-12-22 07:44:20,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 248005 states and 401319 transitions. [2020-12-22 07:44:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:20,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:20,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:20,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:44:20,917 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1717153054, now seen corresponding path program 1 times [2020-12-22 07:44:20,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:20,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151393890] [2020-12-22 07:44:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:20,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151393890] [2020-12-22 07:44:20,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:20,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:20,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050188924] [2020-12-22 07:44:20,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:20,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:20,992 INFO L87 Difference]: Start difference. First operand 248005 states and 401319 transitions. Second operand 3 states. [2020-12-22 07:44:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:30,684 INFO L93 Difference]: Finished difference Result 743978 states and 1203894 transitions. [2020-12-22 07:44:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:30,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:31,692 INFO L225 Difference]: With dead ends: 743978 [2020-12-22 07:44:31,692 INFO L226 Difference]: Without dead ends: 495994 [2020-12-22 07:44:31,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495994 states. [2020-12-22 07:44:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495994 to 248018. [2020-12-22 07:44:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248018 states. [2020-12-22 07:44:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248018 states to 248018 states and 401338 transitions. [2020-12-22 07:44:42,296 INFO L78 Accepts]: Start accepts. Automaton has 248018 states and 401338 transitions. Word has length 142 [2020-12-22 07:44:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:42,297 INFO L481 AbstractCegarLoop]: Abstraction has 248018 states and 401338 transitions. [2020-12-22 07:44:42,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 248018 states and 401338 transitions. [2020-12-22 07:44:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:42,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:42,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:42,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:44:42,299 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:42,300 INFO L82 PathProgramCache]: Analyzing trace with hash -893647865, now seen corresponding path program 1 times [2020-12-22 07:44:42,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:42,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768145268] [2020-12-22 07:44:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:42,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768145268] [2020-12-22 07:44:42,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:42,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:42,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263239223] [2020-12-22 07:44:42,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:42,468 INFO L87 Difference]: Start difference. First operand 248018 states and 401338 transitions. Second operand 3 states. [2020-12-22 07:44:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:54,738 INFO L93 Difference]: Finished difference Result 736697 states and 1191299 transitions. [2020-12-22 07:44:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:54,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:55,843 INFO L225 Difference]: With dead ends: 736697 [2020-12-22 07:44:55,844 INFO L226 Difference]: Without dead ends: 488817 [2020-12-22 07:44:56,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488817 states. [2020-12-22 07:45:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488817 to 488815. [2020-12-22 07:45:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488815 states. [2020-12-22 07:45:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488815 states to 488815 states and 786911 transitions. [2020-12-22 07:45:12,695 INFO L78 Accepts]: Start accepts. Automaton has 488815 states and 786911 transitions. Word has length 142 [2020-12-22 07:45:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:12,696 INFO L481 AbstractCegarLoop]: Abstraction has 488815 states and 786911 transitions. [2020-12-22 07:45:12,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 488815 states and 786911 transitions. [2020-12-22 07:45:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:45:12,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:12,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:12,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:45:12,731 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1215067721, now seen corresponding path program 1 times [2020-12-22 07:45:12,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:12,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821493913] [2020-12-22 07:45:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:45:12,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821493913] [2020-12-22 07:45:12,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:12,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:12,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386918993] [2020-12-22 07:45:12,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:12,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:13,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:13,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:13,000 INFO L87 Difference]: Start difference. First operand 488815 states and 786911 transitions. Second operand 4 states. [2020-12-22 07:45:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:37,421 INFO L93 Difference]: Finished difference Result 1453318 states and 2340114 transitions. [2020-12-22 07:45:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:37,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:45:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:39,888 INFO L225 Difference]: With dead ends: 1453318 [2020-12-22 07:45:39,888 INFO L226 Difference]: Without dead ends: 964540 [2020-12-22 07:45:40,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:45:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964540 states. [2020-12-22 07:46:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964540 to 964538. [2020-12-22 07:46:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964538 states. [2020-12-22 07:46:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964538 states to 964538 states and 1545906 transitions. [2020-12-22 07:46:27,399 INFO L78 Accepts]: Start accepts. Automaton has 964538 states and 1545906 transitions. Word has length 143 [2020-12-22 07:46:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:27,411 INFO L481 AbstractCegarLoop]: Abstraction has 964538 states and 1545906 transitions. [2020-12-22 07:46:27,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 964538 states and 1545906 transitions. [2020-12-22 07:46:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 07:46:27,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:27,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:27,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:46:27,438 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:27,438 INFO L82 PathProgramCache]: Analyzing trace with hash 989121680, now seen corresponding path program 1 times [2020-12-22 07:46:27,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:27,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367597779] [2020-12-22 07:46:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:46:27,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367597779] [2020-12-22 07:46:27,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:27,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:27,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461216649] [2020-12-22 07:46:27,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:27,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:27,570 INFO L87 Difference]: Start difference. First operand 964538 states and 1545906 transitions. Second operand 3 states.