/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.4.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:42:28,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:42:28,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:42:28,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:42:28,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:42:28,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:42:28,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:42:28,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:42:28,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:42:28,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:42:28,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:42:28,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:42:28,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:42:28,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:42:28,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:42:28,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:42:28,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:42:28,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:42:28,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:42:28,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:42:28,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:42:28,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:42:28,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:42:28,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:42:28,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:42:28,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:42:28,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:42:28,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:42:28,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:42:28,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:42:28,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:42:28,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:42:28,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:42:28,841 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:42:28,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:42:28,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:42:28,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:42:28,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:42:28,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:42:28,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:42:28,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:42:28,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:42:28,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:42:28,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:42:28,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:42:28,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:42:28,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:42:28,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:42:28,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:42:28,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:42:28,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:42:28,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:42:28,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:42:28,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:42:28,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:42:29,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:42:29,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:42:29,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:42:29,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:42:29,358 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:42:29,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:42:29,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa4a9a74/0ed18aa9d9cc49c59cb199014348146c/FLAGa1232bb22 [2020-12-22 07:42:30,139 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:42:30,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:42:30,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa4a9a74/0ed18aa9d9cc49c59cb199014348146c/FLAGa1232bb22 [2020-12-22 07:42:30,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa4a9a74/0ed18aa9d9cc49c59cb199014348146c [2020-12-22 07:42:30,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:42:30,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:42:30,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:42:30,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:42:30,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:42:30,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:42:30" (1/1) ... [2020-12-22 07:42:30,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba39f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:30, skipping insertion in model container [2020-12-22 07:42:30,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:42:30" (1/1) ... [2020-12-22 07:42:30,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:42:30,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:42:30,900 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.4.2.ufo.UNBOUNDED.pals.c[31172,31185] [2020-12-22 07:42:30,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:42:30,939 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:42:31,166 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.4.2.ufo.UNBOUNDED.pals.c[31172,31185] [2020-12-22 07:42:31,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:42:31,193 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:42:31,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31 WrapperNode [2020-12-22 07:42:31,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:42:31,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:42:31,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:42:31,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:42:31,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:42:31,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:42:31,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:42:31,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:42:31,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (1/1) ... [2020-12-22 07:42:31,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:42:31,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:42:31,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:42:31,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:42:31,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (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 07:42:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:42:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:42:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:42:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:42:33,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:42:33,447 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:42:33,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:42:33 BoogieIcfgContainer [2020-12-22 07:42:33,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:42:33,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:42:33,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:42:33,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:42:33,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:42:30" (1/3) ... [2020-12-22 07:42:33,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518a2891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:42:33, skipping insertion in model container [2020-12-22 07:42:33,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:42:31" (2/3) ... [2020-12-22 07:42:33,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518a2891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:42:33, skipping insertion in model container [2020-12-22 07:42:33,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:42:33" (3/3) ... [2020-12-22 07:42:33,470 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:42:33,478 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:42:33,485 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:42:33,507 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:42:33,556 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:42:33,557 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:42:33,557 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:42:33,557 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:42:33,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:42:33,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:42:33,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:42:33,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:42:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2020-12-22 07:42:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:42:33,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:33,600 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 07:42:33,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash -196336848, now seen corresponding path program 1 times [2020-12-22 07:42:33,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:33,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94966908] [2020-12-22 07:42:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:34,071 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 07:42:34,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94966908] [2020-12-22 07:42:34,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:34,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:42:34,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159796657] [2020-12-22 07:42:34,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:42:34,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:42:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:42:34,101 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 2 states. [2020-12-22 07:42:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:34,156 INFO L93 Difference]: Finished difference Result 463 states and 821 transitions. [2020-12-22 07:42:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:42:34,158 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:42:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:34,180 INFO L225 Difference]: With dead ends: 463 [2020-12-22 07:42:34,181 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 07:42:34,185 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 07:42:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 07:42:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-22 07:42:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 07:42:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 586 transitions. [2020-12-22 07:42:34,261 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 586 transitions. Word has length 77 [2020-12-22 07:42:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:34,262 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 586 transitions. [2020-12-22 07:42:34,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:42:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 586 transitions. [2020-12-22 07:42:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:42:34,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:34,268 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 07:42:34,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:42:34,269 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash -330350354, now seen corresponding path program 1 times [2020-12-22 07:42:34,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:34,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594580609] [2020-12-22 07:42:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:34,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594580609] [2020-12-22 07:42:34,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:34,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:42:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930277307] [2020-12-22 07:42:34,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:42:34,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:42:34,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:34,616 INFO L87 Difference]: Start difference. First operand 327 states and 586 transitions. Second operand 5 states. [2020-12-22 07:42:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:34,897 INFO L93 Difference]: Finished difference Result 462 states and 814 transitions. [2020-12-22 07:42:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:42:34,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:42:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:34,907 INFO L225 Difference]: With dead ends: 462 [2020-12-22 07:42:34,908 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 07:42:34,915 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 07:42:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 07:42:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-22 07:42:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 07:42:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 540 transitions. [2020-12-22 07:42:34,954 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 540 transitions. Word has length 77 [2020-12-22 07:42:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:34,955 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 540 transitions. [2020-12-22 07:42:34,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:42:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 540 transitions. [2020-12-22 07:42:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:42:34,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:34,962 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 07:42:34,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:42:34,963 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash -550758364, now seen corresponding path program 1 times [2020-12-22 07:42:34,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:34,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345015607] [2020-12-22 07:42:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:35,151 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 07:42:35,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345015607] [2020-12-22 07:42:35,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:35,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:35,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208828898] [2020-12-22 07:42:35,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:35,155 INFO L87 Difference]: Start difference. First operand 327 states and 540 transitions. Second operand 3 states. [2020-12-22 07:42:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:35,246 INFO L93 Difference]: Finished difference Result 577 states and 966 transitions. [2020-12-22 07:42:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:35,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 07:42:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:35,251 INFO L225 Difference]: With dead ends: 577 [2020-12-22 07:42:35,251 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 07:42:35,252 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 07:42:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 07:42:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2020-12-22 07:42:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 07:42:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2020-12-22 07:42:35,270 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 122 [2020-12-22 07:42:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:35,271 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2020-12-22 07:42:35,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2020-12-22 07:42:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:42:35,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:35,276 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 07:42:35,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:42:35,279 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1222100528, now seen corresponding path program 1 times [2020-12-22 07:42:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:35,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259662354] [2020-12-22 07:42:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:35,526 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 07:42:35,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259662354] [2020-12-22 07:42:35,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:35,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:35,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327928510] [2020-12-22 07:42:35,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:35,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:35,529 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand 3 states. [2020-12-22 07:42:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:35,592 INFO L93 Difference]: Finished difference Result 917 states and 1534 transitions. [2020-12-22 07:42:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:35,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 07:42:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:35,603 INFO L225 Difference]: With dead ends: 917 [2020-12-22 07:42:35,603 INFO L226 Difference]: Without dead ends: 670 [2020-12-22 07:42:35,604 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 07:42:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-12-22 07:42:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2020-12-22 07:42:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2020-12-22 07:42:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1109 transitions. [2020-12-22 07:42:35,651 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1109 transitions. Word has length 125 [2020-12-22 07:42:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:35,653 INFO L481 AbstractCegarLoop]: Abstraction has 666 states and 1109 transitions. [2020-12-22 07:42:35,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1109 transitions. [2020-12-22 07:42:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:42:35,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:35,660 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 07:42:35,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:42:35,661 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash -116041787, now seen corresponding path program 1 times [2020-12-22 07:42:35,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:35,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158762035] [2020-12-22 07:42:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:35,837 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 07:42:35,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158762035] [2020-12-22 07:42:35,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:35,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:35,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208612485] [2020-12-22 07:42:35,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:35,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:35,841 INFO L87 Difference]: Start difference. First operand 666 states and 1109 transitions. Second operand 3 states. [2020-12-22 07:42:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:35,936 INFO L93 Difference]: Finished difference Result 1566 states and 2623 transitions. [2020-12-22 07:42:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:35,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 07:42:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:35,945 INFO L225 Difference]: With dead ends: 1566 [2020-12-22 07:42:35,945 INFO L226 Difference]: Without dead ends: 1096 [2020-12-22 07:42:35,947 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 07:42:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-12-22 07:42:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1090. [2020-12-22 07:42:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-12-22 07:42:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1817 transitions. [2020-12-22 07:42:36,001 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1817 transitions. Word has length 128 [2020-12-22 07:42:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:36,001 INFO L481 AbstractCegarLoop]: Abstraction has 1090 states and 1817 transitions. [2020-12-22 07:42:36,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1817 transitions. [2020-12-22 07:42:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:42:36,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:36,007 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 07:42:36,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:42:36,008 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:36,008 INFO L82 PathProgramCache]: Analyzing trace with hash 655173041, now seen corresponding path program 1 times [2020-12-22 07:42:36,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:36,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062643027] [2020-12-22 07:42:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:36,157 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 07:42:36,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062643027] [2020-12-22 07:42:36,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:36,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:36,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87983363] [2020-12-22 07:42:36,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:36,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:36,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:36,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:36,160 INFO L87 Difference]: Start difference. First operand 1090 states and 1817 transitions. Second operand 3 states. [2020-12-22 07:42:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:36,231 INFO L93 Difference]: Finished difference Result 2798 states and 4675 transitions. [2020-12-22 07:42:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:36,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:42:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:36,243 INFO L225 Difference]: With dead ends: 2798 [2020-12-22 07:42:36,244 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 07:42:36,246 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 07:42:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 07:42:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1894. [2020-12-22 07:42:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2020-12-22 07:42:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3149 transitions. [2020-12-22 07:42:36,326 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3149 transitions. Word has length 131 [2020-12-22 07:42:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:36,327 INFO L481 AbstractCegarLoop]: Abstraction has 1894 states and 3149 transitions. [2020-12-22 07:42:36,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3149 transitions. [2020-12-22 07:42:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:42:36,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:36,330 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 07:42:36,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:42:36,331 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 455457894, now seen corresponding path program 1 times [2020-12-22 07:42:36,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:36,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802411380] [2020-12-22 07:42:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:36,748 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 07:42:36,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802411380] [2020-12-22 07:42:36,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:36,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:42:36,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689683151] [2020-12-22 07:42:36,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:42:36,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:36,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:42:36,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:36,752 INFO L87 Difference]: Start difference. First operand 1894 states and 3149 transitions. Second operand 6 states. [2020-12-22 07:42:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:37,213 INFO L93 Difference]: Finished difference Result 7128 states and 11958 transitions. [2020-12-22 07:42:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:42:37,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 07:42:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:37,251 INFO L225 Difference]: With dead ends: 7128 [2020-12-22 07:42:37,252 INFO L226 Difference]: Without dead ends: 5430 [2020-12-22 07:42:37,258 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 07:42:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2020-12-22 07:42:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3479. [2020-12-22 07:42:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3479 states. [2020-12-22 07:42:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5791 transitions. [2020-12-22 07:42:37,451 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5791 transitions. Word has length 134 [2020-12-22 07:42:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:37,451 INFO L481 AbstractCegarLoop]: Abstraction has 3479 states and 5791 transitions. [2020-12-22 07:42:37,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:42:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5791 transitions. [2020-12-22 07:42:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:42:37,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:37,456 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 07:42:37,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:42:37,457 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -860313711, now seen corresponding path program 1 times [2020-12-22 07:42:37,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:37,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756277250] [2020-12-22 07:42:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:37,679 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 07:42:37,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756277250] [2020-12-22 07:42:37,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:37,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:37,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807636062] [2020-12-22 07:42:37,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:37,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:37,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:37,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:37,682 INFO L87 Difference]: Start difference. First operand 3479 states and 5791 transitions. Second operand 4 states. [2020-12-22 07:42:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:37,927 INFO L93 Difference]: Finished difference Result 10270 states and 17204 transitions. [2020-12-22 07:42:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:37,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:42:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:37,968 INFO L225 Difference]: With dead ends: 10270 [2020-12-22 07:42:37,968 INFO L226 Difference]: Without dead ends: 6987 [2020-12-22 07:42:37,976 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 07:42:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2020-12-22 07:42:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 5168. [2020-12-22 07:42:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5168 states. [2020-12-22 07:42:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 8619 transitions. [2020-12-22 07:42:38,200 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 8619 transitions. Word has length 135 [2020-12-22 07:42:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:38,201 INFO L481 AbstractCegarLoop]: Abstraction has 5168 states and 8619 transitions. [2020-12-22 07:42:38,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 8619 transitions. [2020-12-22 07:42:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:42:38,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:38,205 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 07:42:38,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:42:38,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1469443837, now seen corresponding path program 1 times [2020-12-22 07:42:38,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:38,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884250768] [2020-12-22 07:42:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:38,371 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 07:42:38,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884250768] [2020-12-22 07:42:38,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:38,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:38,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908342011] [2020-12-22 07:42:38,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:38,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:38,374 INFO L87 Difference]: Start difference. First operand 5168 states and 8619 transitions. Second operand 4 states. [2020-12-22 07:42:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:38,712 INFO L93 Difference]: Finished difference Result 15356 states and 25688 transitions. [2020-12-22 07:42:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:38,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 07:42:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:38,782 INFO L225 Difference]: With dead ends: 15356 [2020-12-22 07:42:38,782 INFO L226 Difference]: Without dead ends: 10384 [2020-12-22 07:42:38,794 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 07:42:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10384 states. [2020-12-22 07:42:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10384 to 7654. [2020-12-22 07:42:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7654 states. [2020-12-22 07:42:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 12751 transitions. [2020-12-22 07:42:39,200 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 12751 transitions. Word has length 136 [2020-12-22 07:42:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:39,201 INFO L481 AbstractCegarLoop]: Abstraction has 7654 states and 12751 transitions. [2020-12-22 07:42:39,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 12751 transitions. [2020-12-22 07:42:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:42:39,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:39,207 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 07:42:39,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:42:39,208 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash 846488136, now seen corresponding path program 1 times [2020-12-22 07:42:39,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:39,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924487963] [2020-12-22 07:42:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:39,420 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 07:42:39,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924487963] [2020-12-22 07:42:39,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:39,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:39,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374926337] [2020-12-22 07:42:39,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:39,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:39,423 INFO L87 Difference]: Start difference. First operand 7654 states and 12751 transitions. Second operand 4 states. [2020-12-22 07:42:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:39,929 INFO L93 Difference]: Finished difference Result 22512 states and 37612 transitions. [2020-12-22 07:42:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:39,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-12-22 07:42:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:39,976 INFO L225 Difference]: With dead ends: 22512 [2020-12-22 07:42:39,976 INFO L226 Difference]: Without dead ends: 15054 [2020-12-22 07:42:39,991 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 07:42:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2020-12-22 07:42:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 11320. [2020-12-22 07:42:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11320 states. [2020-12-22 07:42:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 18835 transitions. [2020-12-22 07:42:40,468 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 18835 transitions. Word has length 137 [2020-12-22 07:42:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:40,468 INFO L481 AbstractCegarLoop]: Abstraction has 11320 states and 18835 transitions. [2020-12-22 07:42:40,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 18835 transitions. [2020-12-22 07:42:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:42:40,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:40,476 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 07:42:40,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:42:40,476 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1116265068, now seen corresponding path program 1 times [2020-12-22 07:42:40,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:40,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871412347] [2020-12-22 07:42:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:40,733 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 07:42:40,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871412347] [2020-12-22 07:42:40,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:40,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116026092] [2020-12-22 07:42:40,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:40,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:40,738 INFO L87 Difference]: Start difference. First operand 11320 states and 18835 transitions. Second operand 4 states. [2020-12-22 07:42:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:41,334 INFO L93 Difference]: Finished difference Result 34076 states and 56840 transitions. [2020-12-22 07:42:41,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:41,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:42:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:41,391 INFO L225 Difference]: With dead ends: 34076 [2020-12-22 07:42:41,392 INFO L226 Difference]: Without dead ends: 22952 [2020-12-22 07:42:41,409 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 07:42:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22952 states. [2020-12-22 07:42:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22952 to 16656. [2020-12-22 07:42:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16656 states. [2020-12-22 07:42:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16656 states to 16656 states and 27677 transitions. [2020-12-22 07:42:42,038 INFO L78 Accepts]: Start accepts. Automaton has 16656 states and 27677 transitions. Word has length 138 [2020-12-22 07:42:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:42,039 INFO L481 AbstractCegarLoop]: Abstraction has 16656 states and 27677 transitions. [2020-12-22 07:42:42,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 16656 states and 27677 transitions. [2020-12-22 07:42:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:42:42,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:42,045 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 07:42:42,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:42:42,046 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:42,047 INFO L82 PathProgramCache]: Analyzing trace with hash -397139727, now seen corresponding path program 1 times [2020-12-22 07:42:42,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:42,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075187302] [2020-12-22 07:42:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:42,136 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 07:42:42,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075187302] [2020-12-22 07:42:42,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:42,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:42,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249630339] [2020-12-22 07:42:42,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:42,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:42,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:42,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:42,139 INFO L87 Difference]: Start difference. First operand 16656 states and 27677 transitions. Second operand 3 states. [2020-12-22 07:42:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:42,909 INFO L93 Difference]: Finished difference Result 37966 states and 63047 transitions. [2020-12-22 07:42:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:42,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:42:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:42,985 INFO L225 Difference]: With dead ends: 37966 [2020-12-22 07:42:42,985 INFO L226 Difference]: Without dead ends: 26336 [2020-12-22 07:42:43,012 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 07:42:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26336 states. [2020-12-22 07:42:43,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26336 to 26334. [2020-12-22 07:42:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26334 states. [2020-12-22 07:42:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26334 states to 26334 states and 43507 transitions. [2020-12-22 07:42:44,036 INFO L78 Accepts]: Start accepts. Automaton has 26334 states and 43507 transitions. Word has length 138 [2020-12-22 07:42:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:44,037 INFO L481 AbstractCegarLoop]: Abstraction has 26334 states and 43507 transitions. [2020-12-22 07:42:44,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26334 states and 43507 transitions. [2020-12-22 07:42:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:42:44,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:44,042 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 07:42:44,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:42:44,043 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:44,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1906561851, now seen corresponding path program 1 times [2020-12-22 07:42:44,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:44,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041740874] [2020-12-22 07:42:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:44,130 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 07:42:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041740874] [2020-12-22 07:42:44,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:44,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:44,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506066020] [2020-12-22 07:42:44,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:44,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:44,133 INFO L87 Difference]: Start difference. First operand 26334 states and 43507 transitions. Second operand 3 states. [2020-12-22 07:42:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:45,165 INFO L93 Difference]: Finished difference Result 57932 states and 95841 transitions. [2020-12-22 07:42:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:45,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:42:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:45,281 INFO L225 Difference]: With dead ends: 57932 [2020-12-22 07:42:45,281 INFO L226 Difference]: Without dead ends: 39738 [2020-12-22 07:42:45,310 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 07:42:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39738 states. [2020-12-22 07:42:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39738 to 39736. [2020-12-22 07:42:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39736 states. [2020-12-22 07:42:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39736 states to 39736 states and 65427 transitions. [2020-12-22 07:42:46,642 INFO L78 Accepts]: Start accepts. Automaton has 39736 states and 65427 transitions. Word has length 138 [2020-12-22 07:42:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:46,646 INFO L481 AbstractCegarLoop]: Abstraction has 39736 states and 65427 transitions. [2020-12-22 07:42:46,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 39736 states and 65427 transitions. [2020-12-22 07:42:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:42:46,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:46,652 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 07:42:46,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:42:46,652 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash 968808881, now seen corresponding path program 1 times [2020-12-22 07:42:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:46,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475730888] [2020-12-22 07:42:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:46,757 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 07:42:46,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475730888] [2020-12-22 07:42:46,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:46,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:46,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691140711] [2020-12-22 07:42:46,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:46,760 INFO L87 Difference]: Start difference. First operand 39736 states and 65427 transitions. Second operand 3 states. [2020-12-22 07:42:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:48,005 INFO L93 Difference]: Finished difference Result 87708 states and 144475 transitions. [2020-12-22 07:42:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:48,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:42:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:48,144 INFO L225 Difference]: With dead ends: 87708 [2020-12-22 07:42:48,145 INFO L226 Difference]: Without dead ends: 59888 [2020-12-22 07:42:48,177 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 07:42:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59888 states. [2020-12-22 07:42:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59888 to 59886. [2020-12-22 07:42:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59886 states. [2020-12-22 07:42:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59886 states to 59886 states and 98095 transitions. [2020-12-22 07:42:49,966 INFO L78 Accepts]: Start accepts. Automaton has 59886 states and 98095 transitions. Word has length 138 [2020-12-22 07:42:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:49,966 INFO L481 AbstractCegarLoop]: Abstraction has 59886 states and 98095 transitions. [2020-12-22 07:42:49,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 59886 states and 98095 transitions. [2020-12-22 07:42:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:42:49,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:49,969 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 07:42:49,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:42:49,969 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1444659835, now seen corresponding path program 1 times [2020-12-22 07:42:49,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:49,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770417278] [2020-12-22 07:42:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:50,066 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 07:42:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770417278] [2020-12-22 07:42:50,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:50,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338627911] [2020-12-22 07:42:50,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:50,069 INFO L87 Difference]: Start difference. First operand 59886 states and 98095 transitions. Second operand 3 states. [2020-12-22 07:42:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:51,923 INFO L93 Difference]: Finished difference Result 133055 states and 218966 transitions. [2020-12-22 07:42:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:51,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:42:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:52,131 INFO L225 Difference]: With dead ends: 133055 [2020-12-22 07:42:52,131 INFO L226 Difference]: Without dead ends: 90317 [2020-12-22 07:42:52,183 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 07:42:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90317 states. [2020-12-22 07:42:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90317 to 90315. [2020-12-22 07:42:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90315 states. [2020-12-22 07:42:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90315 states to 90315 states and 147458 transitions. [2020-12-22 07:42:54,926 INFO L78 Accepts]: Start accepts. Automaton has 90315 states and 147458 transitions. Word has length 138 [2020-12-22 07:42:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:54,938 INFO L481 AbstractCegarLoop]: Abstraction has 90315 states and 147458 transitions. [2020-12-22 07:42:54,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 90315 states and 147458 transitions. [2020-12-22 07:42:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:42:54,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:54,941 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 07:42:54,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:42:54,941 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:54,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1205053460, now seen corresponding path program 1 times [2020-12-22 07:42:54,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:54,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256539008] [2020-12-22 07:42:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:55,136 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 07:42:55,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256539008] [2020-12-22 07:42:55,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:55,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:55,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936643180] [2020-12-22 07:42:55,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:55,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:55,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:55,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:55,138 INFO L87 Difference]: Start difference. First operand 90315 states and 147458 transitions. Second operand 4 states. [2020-12-22 07:42:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:58,817 INFO L93 Difference]: Finished difference Result 268361 states and 437908 transitions. [2020-12-22 07:42:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:58,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:42:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:59,304 INFO L225 Difference]: With dead ends: 268361 [2020-12-22 07:42:59,305 INFO L226 Difference]: Without dead ends: 178057 [2020-12-22 07:42:59,492 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 07:42:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178057 states. [2020-12-22 07:43:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178057 to 178055. [2020-12-22 07:43:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178055 states. [2020-12-22 07:43:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178055 states to 178055 states and 289292 transitions. [2020-12-22 07:43:05,235 INFO L78 Accepts]: Start accepts. Automaton has 178055 states and 289292 transitions. Word has length 140 [2020-12-22 07:43:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:05,236 INFO L481 AbstractCegarLoop]: Abstraction has 178055 states and 289292 transitions. [2020-12-22 07:43:05,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 178055 states and 289292 transitions. [2020-12-22 07:43:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:43:05,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:05,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:05,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:43:05,254 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash -38716708, now seen corresponding path program 1 times [2020-12-22 07:43:05,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:05,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901164744] [2020-12-22 07:43:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:05,350 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 07:43:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901164744] [2020-12-22 07:43:05,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:05,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:05,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543195988] [2020-12-22 07:43:05,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:05,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:05,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:05,352 INFO L87 Difference]: Start difference. First operand 178055 states and 289292 transitions. Second operand 3 states. [2020-12-22 07:43:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:10,431 INFO L93 Difference]: Finished difference Result 432222 states and 705318 transitions. [2020-12-22 07:43:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:10,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-12-22 07:43:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:10,969 INFO L225 Difference]: With dead ends: 432222 [2020-12-22 07:43:10,969 INFO L226 Difference]: Without dead ends: 254565 [2020-12-22 07:43:11,103 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 07:43:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254565 states. [2020-12-22 07:43:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254565 to 246049. [2020-12-22 07:43:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246049 states. [2020-12-22 07:43:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246049 states to 246049 states and 398035 transitions. [2020-12-22 07:43:18,673 INFO L78 Accepts]: Start accepts. Automaton has 246049 states and 398035 transitions. Word has length 141 [2020-12-22 07:43:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:18,673 INFO L481 AbstractCegarLoop]: Abstraction has 246049 states and 398035 transitions. [2020-12-22 07:43:18,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 246049 states and 398035 transitions. [2020-12-22 07:43:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:43:18,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:18,675 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 07:43:18,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:43:18,676 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash 168060510, now seen corresponding path program 1 times [2020-12-22 07:43:18,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:18,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649120709] [2020-12-22 07:43:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:19,219 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 07:43:19,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649120709] [2020-12-22 07:43:19,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:19,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:19,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43602194] [2020-12-22 07:43:19,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:19,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:19,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:19,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:19,226 INFO L87 Difference]: Start difference. First operand 246049 states and 398035 transitions. Second operand 3 states. [2020-12-22 07:43:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:28,811 INFO L93 Difference]: Finished difference Result 738110 states and 1194042 transitions. [2020-12-22 07:43:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:28,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:43:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:30,245 INFO L225 Difference]: With dead ends: 738110 [2020-12-22 07:43:30,245 INFO L226 Difference]: Without dead ends: 492082 [2020-12-22 07:43:30,489 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 07:43:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492082 states. [2020-12-22 07:43:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492082 to 246062. [2020-12-22 07:43:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246062 states. [2020-12-22 07:43:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246062 states to 246062 states and 398054 transitions. [2020-12-22 07:43:40,913 INFO L78 Accepts]: Start accepts. Automaton has 246062 states and 398054 transitions. Word has length 142 [2020-12-22 07:43:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:40,913 INFO L481 AbstractCegarLoop]: Abstraction has 246062 states and 398054 transitions. [2020-12-22 07:43:40,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 246062 states and 398054 transitions. [2020-12-22 07:43:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:43:40,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:40,916 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 07:43:40,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:43:40,916 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:40,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1852226887, now seen corresponding path program 1 times [2020-12-22 07:43:40,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:40,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102751589] [2020-12-22 07:43:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:41,051 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 07:43:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102751589] [2020-12-22 07:43:41,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:41,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:41,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363528722] [2020-12-22 07:43:41,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:41,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:41,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:41,055 INFO L87 Difference]: Start difference. First operand 246062 states and 398054 transitions. Second operand 3 states. [2020-12-22 07:43:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:53,959 INFO L93 Difference]: Finished difference Result 730829 states and 1181447 transitions. [2020-12-22 07:43:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:53,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:43:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:55,482 INFO L225 Difference]: With dead ends: 730829 [2020-12-22 07:43:55,483 INFO L226 Difference]: Without dead ends: 484905 [2020-12-22 07:43:55,766 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 07:43:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484905 states. [2020-12-22 07:44:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484905 to 484903. [2020-12-22 07:44:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484903 states. [2020-12-22 07:44:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484903 states to 484903 states and 780343 transitions. [2020-12-22 07:44:12,186 INFO L78 Accepts]: Start accepts. Automaton has 484903 states and 780343 transitions. Word has length 142 [2020-12-22 07:44:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:12,186 INFO L481 AbstractCegarLoop]: Abstraction has 484903 states and 780343 transitions. [2020-12-22 07:44:12,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 484903 states and 780343 transitions. [2020-12-22 07:44:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:44:12,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:12,217 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 07:44:12,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:44:12,217 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1530807031, now seen corresponding path program 1 times [2020-12-22 07:44:12,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:12,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009649043] [2020-12-22 07:44:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:12,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009649043] [2020-12-22 07:44:12,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:12,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:12,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263100130] [2020-12-22 07:44:12,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:12,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:12,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:12,442 INFO L87 Difference]: Start difference. First operand 484903 states and 780343 transitions. Second operand 4 states. [2020-12-22 07:44:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:37,623 INFO L93 Difference]: Finished difference Result 1441582 states and 2320410 transitions. [2020-12-22 07:44:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:37,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:44:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:40,658 INFO L225 Difference]: With dead ends: 1441582 [2020-12-22 07:44:40,658 INFO L226 Difference]: Without dead ends: 956716 [2020-12-22 07:44:41,192 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 07:44:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956716 states. [2020-12-22 07:45:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956716 to 956714. [2020-12-22 07:45:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956714 states. [2020-12-22 07:45:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956714 states to 956714 states and 1532770 transitions. [2020-12-22 07:45:28,460 INFO L78 Accepts]: Start accepts. Automaton has 956714 states and 1532770 transitions. Word has length 143 [2020-12-22 07:45:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:28,463 INFO L481 AbstractCegarLoop]: Abstraction has 956714 states and 1532770 transitions. [2020-12-22 07:45:28,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 956714 states and 1532770 transitions. [2020-12-22 07:45:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 07:45:28,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:28,485 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 07:45:28,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:45:28,485 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash -559970864, now seen corresponding path program 1 times [2020-12-22 07:45:28,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:28,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032696548] [2020-12-22 07:45:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:29,404 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 07:45:29,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032696548] [2020-12-22 07:45:29,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:29,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:29,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412994977] [2020-12-22 07:45:29,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:29,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:29,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:29,410 INFO L87 Difference]: Start difference. First operand 956714 states and 1532770 transitions. Second operand 3 states.