/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:07:18,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:07:18,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:07:18,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:07:18,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:07:18,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:07:18,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:07:18,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:07:18,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:07:18,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:07:18,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:07:18,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:07:18,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:07:18,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:07:18,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:07:18,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:07:18,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:07:18,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:07:18,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:07:18,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:07:18,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:07:18,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:07:18,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:07:18,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:07:18,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:07:18,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:07:18,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:07:18,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:07:18,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:07:18,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:07:18,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:07:18,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:07:18,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:07:18,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:07:18,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:07:18,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:07:18,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:07:18,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:07:18,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:07:18,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:07:18,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:07:18,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:07:18,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:07:18,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:07:18,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:07:18,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:07:18,604 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:07:18,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:07:18,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:07:18,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:07:18,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:07:18,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:07:18,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:07:18,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:07:18,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:07:18,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:07:18,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:07:18,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:07:18,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:07:18,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:07:18,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:07:18,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:07:18,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:07:18,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:07:18,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:07:18,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:07:18,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:07:18,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:07:18,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:07:18,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:07:18,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:07:18,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:07:18,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:07:18,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:07:18,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:07:18,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:07:18,914 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:07:18,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:07:18,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df653d29f/b54e943902a746e78a96bab1847875ca/FLAGc9e219f00 [2020-10-13 14:07:19,499 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:07:19,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:07:19,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df653d29f/b54e943902a746e78a96bab1847875ca/FLAGc9e219f00 [2020-10-13 14:07:19,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df653d29f/b54e943902a746e78a96bab1847875ca [2020-10-13 14:07:19,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:07:19,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:07:19,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:07:19,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:07:19,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:07:19,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:07:19" (1/1) ... [2020-10-13 14:07:19,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a89726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:19, skipping insertion in model container [2020-10-13 14:07:19,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:07:19" (1/1) ... [2020-10-13 14:07:19,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:07:19,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:07:20,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:07:20,176 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:07:20,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:07:20,409 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:07:20,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20 WrapperNode [2020-10-13 14:07:20,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:07:20,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:07:20,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:07:20,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:07:20,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... [2020-10-13 14:07:20,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... [2020-10-13 14:07:20,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... [2020-10-13 14:07:20,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... [2020-10-13 14:07:20,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... [2020-10-13 14:07:20,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... [2020-10-13 14:07:20,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... [2020-10-13 14:07:20,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:07:20,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:07:20,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:07:20,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:07:20,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-13 14:07:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:07:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:07:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:07:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:07:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:07:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:07:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:07:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:07:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:07:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:07:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:07:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:07:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:07:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:07:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:07:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:07:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:07:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:07:20,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:07:20,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:07:21,229 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:07:21,230 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:07:21,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:07:21 BoogieIcfgContainer [2020-10-13 14:07:21,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:07:21,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:07:21,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:07:21,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:07:21,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:07:19" (1/3) ... [2020-10-13 14:07:21,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3e4ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:07:21, skipping insertion in model container [2020-10-13 14:07:21,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:07:20" (2/3) ... [2020-10-13 14:07:21,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3e4ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:07:21, skipping insertion in model container [2020-10-13 14:07:21,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:07:21" (3/3) ... [2020-10-13 14:07:21,245 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:07:21,257 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:07:21,266 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-13 14:07:21,288 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-13 14:07:21,336 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:07:21,336 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:07:21,337 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:07:21,337 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:07:21,337 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:07:21,337 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:07:21,338 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:07:21,338 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:07:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states. [2020-10-13 14:07:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 14:07:21,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:21,378 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] [2020-10-13 14:07:21,379 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1391070789, now seen corresponding path program 1 times [2020-10-13 14:07:21,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:21,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133585457] [2020-10-13 14:07:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:21,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:21,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:22,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:23,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:25,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:25,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:25,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:26,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:26,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 14:07:26,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:07:26,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 14:07:26,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:26,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:26,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 14:07:26,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:07:26,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 14:07:26,939 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:07:26,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:26,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:26,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:26,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:26,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:26,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 14:07:26,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:26,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:07:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:27,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133585457] [2020-10-13 14:07:27,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:27,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:27,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627254818] [2020-10-13 14:07:27,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:27,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:27,062 INFO L87 Difference]: Start difference. First operand 111 states. Second operand 4 states. [2020-10-13 14:07:27,269 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:07:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:28,068 INFO L93 Difference]: Finished difference Result 220 states and 355 transitions. [2020-10-13 14:07:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:07:28,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-13 14:07:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:28,086 INFO L225 Difference]: With dead ends: 220 [2020-10-13 14:07:28,086 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 14:07:28,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:07:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 14:07:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-10-13 14:07:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 14:07:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 223 transitions. [2020-10-13 14:07:28,158 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 223 transitions. Word has length 52 [2020-10-13 14:07:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:28,159 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 223 transitions. [2020-10-13 14:07:28,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:07:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 223 transitions. [2020-10-13 14:07:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:07:28,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:28,162 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] [2020-10-13 14:07:28,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:07:28,163 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash -341683458, now seen corresponding path program 1 times [2020-10-13 14:07:28,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:28,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88440154] [2020-10-13 14:07:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:33,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:33,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:07:33,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:07:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:07:33,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 14:07:33,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:07:33,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:07:33,377 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:07:33,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:33,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:33,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:33,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:33,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:33,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:07:33,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:33,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:33,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:33,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:33,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88440154] [2020-10-13 14:07:33,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:33,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:33,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730906620] [2020-10-13 14:07:33,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:33,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:33,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:33,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:33,412 INFO L87 Difference]: Start difference. First operand 159 states and 223 transitions. Second operand 4 states. [2020-10-13 14:07:33,557 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:07:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:34,070 INFO L93 Difference]: Finished difference Result 248 states and 356 transitions. [2020-10-13 14:07:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:07:34,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:07:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:34,074 INFO L225 Difference]: With dead ends: 248 [2020-10-13 14:07:34,076 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 14:07:34,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:07:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 14:07:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-13 14:07:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 14:07:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2020-10-13 14:07:34,096 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 53 [2020-10-13 14:07:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:34,097 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2020-10-13 14:07:34,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:07:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2020-10-13 14:07:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:07:34,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:34,099 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] [2020-10-13 14:07:34,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:07:34,100 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash 235985469, now seen corresponding path program 1 times [2020-10-13 14:07:34,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:34,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601074735] [2020-10-13 14:07:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:35,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:35,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:35,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:35,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:39,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:39,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:07:39,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:07:39,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:07:39,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:07:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:07:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:07:39,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:07:39,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:39,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:39,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:39,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:39,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:39,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:07:39,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:39,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:39,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:39,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:39,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601074735] [2020-10-13 14:07:39,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:39,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:07:39,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311203896] [2020-10-13 14:07:39,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:07:39,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:39,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:07:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:07:39,324 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand 7 states. [2020-10-13 14:07:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:40,347 INFO L93 Difference]: Finished difference Result 961 states and 1418 transitions. [2020-10-13 14:07:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:07:40,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-13 14:07:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:40,357 INFO L225 Difference]: With dead ends: 961 [2020-10-13 14:07:40,357 INFO L226 Difference]: Without dead ends: 835 [2020-10-13 14:07:40,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:07:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2020-10-13 14:07:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 381. [2020-10-13 14:07:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-13 14:07:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 553 transitions. [2020-10-13 14:07:40,432 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 553 transitions. Word has length 54 [2020-10-13 14:07:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:40,433 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 553 transitions. [2020-10-13 14:07:40,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:07:40,435 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 553 transitions. [2020-10-13 14:07:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:07:40,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:40,438 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] [2020-10-13 14:07:40,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:07:40,441 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash -749860132, now seen corresponding path program 1 times [2020-10-13 14:07:40,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:40,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249591326] [2020-10-13 14:07:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:40,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:40,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:40,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:41,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:41,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:42,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:45,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:45,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:07:45,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:07:45,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:07:45,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:07:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:07:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:07:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:45,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:45,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:45,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:45,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:45,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:07:45,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:45,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249591326] [2020-10-13 14:07:45,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:45,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:07:45,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173095363] [2020-10-13 14:07:45,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:07:45,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:07:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:07:45,624 INFO L87 Difference]: Start difference. First operand 381 states and 553 transitions. Second operand 7 states. [2020-10-13 14:07:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:46,465 INFO L93 Difference]: Finished difference Result 1940 states and 2925 transitions. [2020-10-13 14:07:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:07:46,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:07:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:46,475 INFO L225 Difference]: With dead ends: 1940 [2020-10-13 14:07:46,475 INFO L226 Difference]: Without dead ends: 1638 [2020-10-13 14:07:46,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:07:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2020-10-13 14:07:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 581. [2020-10-13 14:07:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-13 14:07:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 856 transitions. [2020-10-13 14:07:46,521 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 856 transitions. Word has length 55 [2020-10-13 14:07:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:46,522 INFO L479 AbstractCegarLoop]: Abstraction has 581 states and 856 transitions. [2020-10-13 14:07:46,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:07:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 856 transitions. [2020-10-13 14:07:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:07:46,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:46,524 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] [2020-10-13 14:07:46,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:07:46,525 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1035526707, now seen corresponding path program 1 times [2020-10-13 14:07:46,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:46,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176011190] [2020-10-13 14:07:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:46,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:46,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:51,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:51,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:07:51,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:07:51,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:07:51,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:51,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:07:51,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:07:51,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:07:51,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:51,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:51,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:51,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:51,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:07:51,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:51,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176011190] [2020-10-13 14:07:51,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:51,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:07:51,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125988926] [2020-10-13 14:07:51,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:07:51,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:51,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:07:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:07:51,705 INFO L87 Difference]: Start difference. First operand 581 states and 856 transitions. Second operand 7 states. [2020-10-13 14:07:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:52,699 INFO L93 Difference]: Finished difference Result 2306 states and 3445 transitions. [2020-10-13 14:07:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:07:52,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:07:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:52,710 INFO L225 Difference]: With dead ends: 2306 [2020-10-13 14:07:52,710 INFO L226 Difference]: Without dead ends: 2010 [2020-10-13 14:07:52,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:07:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2020-10-13 14:07:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 889. [2020-10-13 14:07:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-10-13 14:07:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1306 transitions. [2020-10-13 14:07:52,776 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1306 transitions. Word has length 55 [2020-10-13 14:07:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:52,776 INFO L479 AbstractCegarLoop]: Abstraction has 889 states and 1306 transitions. [2020-10-13 14:07:52,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:07:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1306 transitions. [2020-10-13 14:07:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:07:52,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:52,778 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] [2020-10-13 14:07:52,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:07:52,779 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash 40827692, now seen corresponding path program 1 times [2020-10-13 14:07:52,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:52,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030105606] [2020-10-13 14:07:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:52,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:52,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:52,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:53,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:53,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:53,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:53,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:56,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:57,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:57,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:07:57,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:07:57,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:07:57,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:57,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:07:57,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:07:57,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:07:57,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:57,992 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:07:57,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:58,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:58,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:58,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:58,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:07:58,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:07:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:07:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:58,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030105606] [2020-10-13 14:07:58,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:58,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:07:58,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777389967] [2020-10-13 14:07:58,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:07:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:07:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:07:58,046 INFO L87 Difference]: Start difference. First operand 889 states and 1306 transitions. Second operand 6 states. [2020-10-13 14:07:58,228 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 14:07:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:58,828 INFO L93 Difference]: Finished difference Result 1231 states and 1812 transitions. [2020-10-13 14:07:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:07:58,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-13 14:07:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:58,834 INFO L225 Difference]: With dead ends: 1231 [2020-10-13 14:07:58,834 INFO L226 Difference]: Without dead ends: 659 [2020-10-13 14:07:58,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:07:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-13 14:07:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 650. [2020-10-13 14:07:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-13 14:07:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 947 transitions. [2020-10-13 14:07:58,914 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 947 transitions. Word has length 56 [2020-10-13 14:07:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:58,915 INFO L479 AbstractCegarLoop]: Abstraction has 650 states and 947 transitions. [2020-10-13 14:07:58,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:07:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 947 transitions. [2020-10-13 14:07:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:07:58,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:58,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:07:58,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:07:58,918 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:58,918 INFO L82 PathProgramCache]: Analyzing trace with hash -244838883, now seen corresponding path program 1 times [2020-10-13 14:07:58,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:58,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437434483] [2020-10-13 14:07:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:58,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:58,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:59,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:59,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:59,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:59,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:59,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:00,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:00,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:00,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:01,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:01,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:01,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:01,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:02,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:02,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:03,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:03,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:03,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:03,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:08:03,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 14:08:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:08:03,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:08:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:08:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 14:08:03,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:04,116 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:08:04,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:04,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:04,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:04,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:04,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 14:08:04,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:08:04,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:04,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:08:04,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:08:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:04,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437434483] [2020-10-13 14:08:04,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:04,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:08:04,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677973944] [2020-10-13 14:08:04,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:08:04,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:04,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:08:04,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:04,176 INFO L87 Difference]: Start difference. First operand 650 states and 947 transitions. Second operand 6 states. [2020-10-13 14:08:04,354 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 14:08:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:04,833 INFO L93 Difference]: Finished difference Result 1002 states and 1469 transitions. [2020-10-13 14:08:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:08:04,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-13 14:08:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:04,837 INFO L225 Difference]: With dead ends: 1002 [2020-10-13 14:08:04,838 INFO L226 Difference]: Without dead ends: 441 [2020-10-13 14:08:04,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:08:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-13 14:08:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 433. [2020-10-13 14:08:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-13 14:08:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 625 transitions. [2020-10-13 14:08:04,877 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 625 transitions. Word has length 56 [2020-10-13 14:08:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:04,878 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 625 transitions. [2020-10-13 14:08:04,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:08:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 625 transitions. [2020-10-13 14:08:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:08:04,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:04,880 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] [2020-10-13 14:08:04,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:08:04,880 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1531969266, now seen corresponding path program 1 times [2020-10-13 14:08:04,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:04,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80927886] [2020-10-13 14:08:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:04,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:09,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:09,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:09,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:08:09,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:08:09,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:08:09,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:08:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:08:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:08:09,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:10,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:10,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:10,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:10,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:10,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:08:10,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:08:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:08:10,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:08:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:10,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80927886] [2020-10-13 14:08:10,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:10,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:08:10,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645660675] [2020-10-13 14:08:10,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:08:10,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:08:10,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:10,080 INFO L87 Difference]: Start difference. First operand 433 states and 625 transitions. Second operand 6 states. [2020-10-13 14:08:10,250 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:08:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:10,810 INFO L93 Difference]: Finished difference Result 1212 states and 1775 transitions. [2020-10-13 14:08:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:08:10,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-13 14:08:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:10,816 INFO L225 Difference]: With dead ends: 1212 [2020-10-13 14:08:10,816 INFO L226 Difference]: Without dead ends: 806 [2020-10-13 14:08:10,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:08:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-10-13 14:08:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 801. [2020-10-13 14:08:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2020-10-13 14:08:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1166 transitions. [2020-10-13 14:08:10,905 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1166 transitions. Word has length 56 [2020-10-13 14:08:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:10,906 INFO L479 AbstractCegarLoop]: Abstraction has 801 states and 1166 transitions. [2020-10-13 14:08:10,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:08:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1166 transitions. [2020-10-13 14:08:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:08:10,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:10,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:08:10,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:08:10,908 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:10,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1504516798, now seen corresponding path program 1 times [2020-10-13 14:08:10,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:10,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651678745] [2020-10-13 14:08:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:10,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:10,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:12,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:12,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:15,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:15,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:08:15,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:08:15,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:08:15,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:15,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:08:15,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:08:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:08:15,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:16,295 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-13 14:08:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:16,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:16,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:16,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:16,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:08:16,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:16,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:16,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651678745] [2020-10-13 14:08:16,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:16,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:08:16,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004763717] [2020-10-13 14:08:16,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:08:16,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:08:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:08:16,458 INFO L87 Difference]: Start difference. First operand 801 states and 1166 transitions. Second operand 11 states. [2020-10-13 14:08:16,612 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-13 14:08:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:18,812 INFO L93 Difference]: Finished difference Result 3626 states and 5364 transitions. [2020-10-13 14:08:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:08:18,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-13 14:08:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:18,833 INFO L225 Difference]: With dead ends: 3626 [2020-10-13 14:08:18,834 INFO L226 Difference]: Without dead ends: 2985 [2020-10-13 14:08:18,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-10-13 14:08:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2985 states. [2020-10-13 14:08:19,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2985 to 821. [2020-10-13 14:08:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-10-13 14:08:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1195 transitions. [2020-10-13 14:08:19,041 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1195 transitions. Word has length 57 [2020-10-13 14:08:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:19,042 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1195 transitions. [2020-10-13 14:08:19,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:08:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1195 transitions. [2020-10-13 14:08:19,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:08:19,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:19,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:08:19,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:08:19,044 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash 655418725, now seen corresponding path program 1 times [2020-10-13 14:08:19,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:19,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020407508] [2020-10-13 14:08:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:19,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:19,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:19,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:19,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:19,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:22,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:22,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:23,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:23,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:24,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:24,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:08:24,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:08:24,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:08:24,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:08:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:08:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:08:24,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:24,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:24,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:24,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:24,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:24,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:24,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:24,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:24,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:24,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020407508] [2020-10-13 14:08:24,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:24,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:08:24,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354945279] [2020-10-13 14:08:24,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:08:24,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:08:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:08:24,366 INFO L87 Difference]: Start difference. First operand 821 states and 1195 transitions. Second operand 8 states. [2020-10-13 14:08:24,524 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:08:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:25,362 INFO L93 Difference]: Finished difference Result 1803 states and 2657 transitions. [2020-10-13 14:08:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:08:25,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-13 14:08:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:25,368 INFO L225 Difference]: With dead ends: 1803 [2020-10-13 14:08:25,368 INFO L226 Difference]: Without dead ends: 1122 [2020-10-13 14:08:25,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:08:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-10-13 14:08:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 801. [2020-10-13 14:08:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2020-10-13 14:08:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1165 transitions. [2020-10-13 14:08:25,476 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1165 transitions. Word has length 57 [2020-10-13 14:08:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:25,476 INFO L479 AbstractCegarLoop]: Abstraction has 801 states and 1165 transitions. [2020-10-13 14:08:25,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:08:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1165 transitions. [2020-10-13 14:08:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:08:25,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:25,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:08:25,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:08:25,478 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash 939986216, now seen corresponding path program 1 times [2020-10-13 14:08:25,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:25,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473761117] [2020-10-13 14:08:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:25,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:25,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:25,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:26,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:26,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:30,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:08:30,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:08:30,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:08:30,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:08:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:08:30,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:08:30,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:30,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:30,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:30,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:30,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:30,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:08:30,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:30,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:30,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:30,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:30,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:30,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473761117] [2020-10-13 14:08:30,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:30,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:08:30,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58747178] [2020-10-13 14:08:30,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:08:30,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:08:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:08:30,830 INFO L87 Difference]: Start difference. First operand 801 states and 1165 transitions. Second operand 11 states. [2020-10-13 14:08:31,075 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 14:08:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:32,385 INFO L93 Difference]: Finished difference Result 2460 states and 3640 transitions. [2020-10-13 14:08:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 14:08:32,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-13 14:08:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:32,396 INFO L225 Difference]: With dead ends: 2460 [2020-10-13 14:08:32,396 INFO L226 Difference]: Without dead ends: 1814 [2020-10-13 14:08:32,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:08:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2020-10-13 14:08:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 801. [2020-10-13 14:08:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2020-10-13 14:08:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1164 transitions. [2020-10-13 14:08:32,523 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1164 transitions. Word has length 57 [2020-10-13 14:08:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:32,523 INFO L479 AbstractCegarLoop]: Abstraction has 801 states and 1164 transitions. [2020-10-13 14:08:32,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:08:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1164 transitions. [2020-10-13 14:08:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:08:32,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:32,528 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] [2020-10-13 14:08:32,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:08:32,528 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1275481004, now seen corresponding path program 1 times [2020-10-13 14:08:32,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:32,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200439346] [2020-10-13 14:08:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:32,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:32,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:33,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:33,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:37,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:37,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:08:37,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:08:37,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4677 [2020-10-13 14:08:37,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:08:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:08:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 14:08:37,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:37,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:37,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:37,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:37,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:37,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:37,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:08:37,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:37,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:37,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:37,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:37,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:37,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200439346] [2020-10-13 14:08:37,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:37,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:08:37,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809187118] [2020-10-13 14:08:37,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:08:37,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:37,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:08:37,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:08:37,596 INFO L87 Difference]: Start difference. First operand 801 states and 1164 transitions. Second operand 9 states. [2020-10-13 14:08:37,836 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 14:08:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:38,788 INFO L93 Difference]: Finished difference Result 1776 states and 2624 transitions. [2020-10-13 14:08:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:08:38,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-13 14:08:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:38,792 INFO L225 Difference]: With dead ends: 1776 [2020-10-13 14:08:38,793 INFO L226 Difference]: Without dead ends: 1108 [2020-10-13 14:08:38,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-13 14:08:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-10-13 14:08:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 787. [2020-10-13 14:08:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2020-10-13 14:08:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1142 transitions. [2020-10-13 14:08:38,935 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1142 transitions. Word has length 58 [2020-10-13 14:08:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:38,935 INFO L479 AbstractCegarLoop]: Abstraction has 787 states and 1142 transitions. [2020-10-13 14:08:38,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:08:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1142 transitions. [2020-10-13 14:08:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:08:38,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:38,936 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] [2020-10-13 14:08:38,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:08:38,937 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1942482780, now seen corresponding path program 1 times [2020-10-13 14:08:38,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:38,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409408951] [2020-10-13 14:08:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:38,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:38,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:39,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:39,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:39,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:43,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:43,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:08:43,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:08:43,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:08:43,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:43,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:08:43,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 14:08:43,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:08:43,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:44,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:44,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:44,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:44,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:44,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:44,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:44,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:44,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:44,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409408951] [2020-10-13 14:08:44,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:44,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:08:44,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820899852] [2020-10-13 14:08:44,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:08:44,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:44,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:08:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:44,088 INFO L87 Difference]: Start difference. First operand 787 states and 1142 transitions. Second operand 6 states. [2020-10-13 14:08:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:44,718 INFO L93 Difference]: Finished difference Result 2020 states and 3007 transitions. [2020-10-13 14:08:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:08:44,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-13 14:08:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:44,724 INFO L225 Difference]: With dead ends: 2020 [2020-10-13 14:08:44,724 INFO L226 Difference]: Without dead ends: 1394 [2020-10-13 14:08:44,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:08:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2020-10-13 14:08:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1383. [2020-10-13 14:08:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1383 states. [2020-10-13 14:08:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2032 transitions. [2020-10-13 14:08:45,001 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2032 transitions. Word has length 58 [2020-10-13 14:08:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:45,001 INFO L479 AbstractCegarLoop]: Abstraction has 1383 states and 2032 transitions. [2020-10-13 14:08:45,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:08:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2032 transitions. [2020-10-13 14:08:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:08:45,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:45,003 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] [2020-10-13 14:08:45,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:08:45,004 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:45,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1503386443, now seen corresponding path program 1 times [2020-10-13 14:08:45,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:45,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638553007] [2020-10-13 14:08:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:45,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:45,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:45,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:50,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:50,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:08:50,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:08:50,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:08:50,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:08:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:08:50,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:08:50,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:50,293 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2020-10-13 14:08:50,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:50,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:50,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:50,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:50,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:08:50,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:50,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:50,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638553007] [2020-10-13 14:08:50,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:50,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:08:50,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652152155] [2020-10-13 14:08:50,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:08:50,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:50,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:08:50,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:08:50,472 INFO L87 Difference]: Start difference. First operand 1383 states and 2032 transitions. Second operand 12 states. [2020-10-13 14:08:50,644 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:08:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:54,958 INFO L93 Difference]: Finished difference Result 10853 states and 15830 transitions. [2020-10-13 14:08:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 14:08:54,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-13 14:08:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:54,995 INFO L225 Difference]: With dead ends: 10853 [2020-10-13 14:08:54,996 INFO L226 Difference]: Without dead ends: 9620 [2020-10-13 14:08:55,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 14:08:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9620 states. [2020-10-13 14:08:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9620 to 1383. [2020-10-13 14:08:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1383 states. [2020-10-13 14:08:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2030 transitions. [2020-10-13 14:08:55,453 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2030 transitions. Word has length 58 [2020-10-13 14:08:55,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:55,454 INFO L479 AbstractCegarLoop]: Abstraction has 1383 states and 2030 transitions. [2020-10-13 14:08:55,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:08:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2030 transitions. [2020-10-13 14:08:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:08:55,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:55,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:08:55,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:08:55,455 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash -255585995, now seen corresponding path program 1 times [2020-10-13 14:08:55,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:55,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899355562] [2020-10-13 14:08:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:55,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:55,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:55,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:55,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:55,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:57,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:57,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:08:57,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:08:57,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-13 14:08:57,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:57,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:08:57,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:08:57,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 14:08:57,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:57,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:57,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:57,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:57,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899355562] [2020-10-13 14:08:57,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:57,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:08:57,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239517531] [2020-10-13 14:08:57,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:08:57,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:57,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:08:57,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:08:57,607 INFO L87 Difference]: Start difference. First operand 1383 states and 2030 transitions. Second operand 12 states. [2020-10-13 14:08:57,903 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2020-10-13 14:08:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:59,625 INFO L93 Difference]: Finished difference Result 3963 states and 5846 transitions. [2020-10-13 14:08:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:08:59,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-13 14:08:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:59,632 INFO L225 Difference]: With dead ends: 3963 [2020-10-13 14:08:59,632 INFO L226 Difference]: Without dead ends: 2721 [2020-10-13 14:08:59,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:08:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2020-10-13 14:08:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1383. [2020-10-13 14:08:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1383 states. [2020-10-13 14:08:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2029 transitions. [2020-10-13 14:08:59,915 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2029 transitions. Word has length 59 [2020-10-13 14:08:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:59,916 INFO L479 AbstractCegarLoop]: Abstraction has 1383 states and 2029 transitions. [2020-10-13 14:08:59,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:08:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2029 transitions. [2020-10-13 14:08:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:08:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:59,916 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] [2020-10-13 14:08:59,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:08:59,917 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 392725555, now seen corresponding path program 1 times [2020-10-13 14:08:59,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:59,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699220810] [2020-10-13 14:08:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:59,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2738 [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:09:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:02,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:02,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:02,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:02,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:02,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:02,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:02,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:02,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:02,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:02,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:02,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699220810] [2020-10-13 14:09:02,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:02,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:09:02,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345277610] [2020-10-13 14:09:02,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:09:02,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:02,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:09:02,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:09:02,969 INFO L87 Difference]: Start difference. First operand 1383 states and 2029 transitions. Second operand 12 states. [2020-10-13 14:09:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:04,577 INFO L93 Difference]: Finished difference Result 3852 states and 5731 transitions. [2020-10-13 14:09:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 14:09:04,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-13 14:09:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:04,583 INFO L225 Difference]: With dead ends: 3852 [2020-10-13 14:09:04,584 INFO L226 Difference]: Without dead ends: 2614 [2020-10-13 14:09:04,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-13 14:09:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2020-10-13 14:09:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 1372. [2020-10-13 14:09:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2020-10-13 14:09:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2012 transitions. [2020-10-13 14:09:04,921 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2012 transitions. Word has length 59 [2020-10-13 14:09:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:04,922 INFO L479 AbstractCegarLoop]: Abstraction has 1372 states and 2012 transitions. [2020-10-13 14:09:04,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:09:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2012 transitions. [2020-10-13 14:09:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:09:04,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:04,923 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] [2020-10-13 14:09:04,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:09:04,923 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash 765583537, now seen corresponding path program 1 times [2020-10-13 14:09:04,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:04,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106928768] [2020-10-13 14:09:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:04,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:04,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:05,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:05,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:05,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:05,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:06,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1883 [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:09:06,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:07,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:07,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:07,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:07,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:07,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:07,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:07,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:07,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:07,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:07,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:07,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106928768] [2020-10-13 14:09:07,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:07,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:09:07,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857849017] [2020-10-13 14:09:07,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:09:07,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:09:07,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:09:07,088 INFO L87 Difference]: Start difference. First operand 1372 states and 2012 transitions. Second operand 9 states. [2020-10-13 14:09:07,242 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:09:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:08,214 INFO L93 Difference]: Finished difference Result 2662 states and 3920 transitions. [2020-10-13 14:09:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 14:09:08,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-13 14:09:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:08,218 INFO L225 Difference]: With dead ends: 2662 [2020-10-13 14:09:08,218 INFO L226 Difference]: Without dead ends: 1420 [2020-10-13 14:09:08,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-13 14:09:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2020-10-13 14:09:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1372. [2020-10-13 14:09:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2020-10-13 14:09:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2011 transitions. [2020-10-13 14:09:08,487 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2011 transitions. Word has length 60 [2020-10-13 14:09:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:08,487 INFO L479 AbstractCegarLoop]: Abstraction has 1372 states and 2011 transitions. [2020-10-13 14:09:08,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:09:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2011 transitions. [2020-10-13 14:09:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:09:08,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:08,489 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] [2020-10-13 14:09:08,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:09:08,489 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1413895087, now seen corresponding path program 1 times [2020-10-13 14:09:08,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:08,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609391279] [2020-10-13 14:09:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:08,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:09,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:09:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:09,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:09,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:09,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:09,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:09,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:09,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:09,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:09,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609391279] [2020-10-13 14:09:09,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:09,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:09:09,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776252849] [2020-10-13 14:09:09,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:09:09,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:09:09,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:09:09,479 INFO L87 Difference]: Start difference. First operand 1372 states and 2011 transitions. Second operand 6 states. [2020-10-13 14:09:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:10,401 INFO L93 Difference]: Finished difference Result 3349 states and 4978 transitions. [2020-10-13 14:09:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:09:10,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 14:09:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:10,406 INFO L225 Difference]: With dead ends: 3349 [2020-10-13 14:09:10,406 INFO L226 Difference]: Without dead ends: 2131 [2020-10-13 14:09:10,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:09:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2020-10-13 14:09:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1996. [2020-10-13 14:09:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1996 states. [2020-10-13 14:09:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2962 transitions. [2020-10-13 14:09:10,876 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2962 transitions. Word has length 60 [2020-10-13 14:09:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:10,876 INFO L479 AbstractCegarLoop]: Abstraction has 1996 states and 2962 transitions. [2020-10-13 14:09:10,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:09:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2962 transitions. [2020-10-13 14:09:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:09:10,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:10,877 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] [2020-10-13 14:09:10,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:09:10,878 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -230774043, now seen corresponding path program 1 times [2020-10-13 14:09:10,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:10,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125197453] [2020-10-13 14:09:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:10,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:10,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:11,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:11,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:11,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:11,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:09:11,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:09:11,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-13 14:09:11,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:09:11,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:09:11,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:09:11,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:12,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:12,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:12,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:12,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:12,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:12,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:12,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:12,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125197453] [2020-10-13 14:09:12,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:12,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-13 14:09:12,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478880316] [2020-10-13 14:09:12,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:09:12,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:09:12,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:09:12,240 INFO L87 Difference]: Start difference. First operand 1996 states and 2962 transitions. Second operand 13 states. [2020-10-13 14:09:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:15,266 INFO L93 Difference]: Finished difference Result 8562 states and 12836 transitions. [2020-10-13 14:09:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 14:09:15,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-13 14:09:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:15,281 INFO L225 Difference]: With dead ends: 8562 [2020-10-13 14:09:15,281 INFO L226 Difference]: Without dead ends: 6699 [2020-10-13 14:09:15,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:09:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6699 states. [2020-10-13 14:09:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6699 to 1986. [2020-10-13 14:09:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1986 states. [2020-10-13 14:09:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 2946 transitions. [2020-10-13 14:09:15,809 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 2946 transitions. Word has length 60 [2020-10-13 14:09:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:15,810 INFO L479 AbstractCegarLoop]: Abstraction has 1986 states and 2946 transitions. [2020-10-13 14:09:15,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:09:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 2946 transitions. [2020-10-13 14:09:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:09:15,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:15,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:09:15,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:09:15,811 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 712912778, now seen corresponding path program 1 times [2020-10-13 14:09:15,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:15,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710808956] [2020-10-13 14:09:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:15,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:16,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:16,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:09:16,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:16,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-13 14:09:16,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:09:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:09:16,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:16,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:16,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:16,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:16,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:16,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:16,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:16,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:16,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:16,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710808956] [2020-10-13 14:09:16,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:16,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 14:09:16,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493445203] [2020-10-13 14:09:16,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:09:16,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:16,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:09:16,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:09:16,382 INFO L87 Difference]: Start difference. First operand 1986 states and 2946 transitions. Second operand 10 states. [2020-10-13 14:09:16,523 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:09:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:17,625 INFO L93 Difference]: Finished difference Result 3839 states and 5742 transitions. [2020-10-13 14:09:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:09:17,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-13 14:09:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:17,628 INFO L225 Difference]: With dead ends: 3839 [2020-10-13 14:09:17,629 INFO L226 Difference]: Without dead ends: 1977 [2020-10-13 14:09:17,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-13 14:09:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2020-10-13 14:09:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1977. [2020-10-13 14:09:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1977 states. [2020-10-13 14:09:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2934 transitions. [2020-10-13 14:09:18,102 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2934 transitions. Word has length 61 [2020-10-13 14:09:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:18,102 INFO L479 AbstractCegarLoop]: Abstraction has 1977 states and 2934 transitions. [2020-10-13 14:09:18,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:09:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2934 transitions. [2020-10-13 14:09:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:09:18,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:18,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:09:18,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:09:18,103 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1827582442, now seen corresponding path program 1 times [2020-10-13 14:09:18,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:18,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346918658] [2020-10-13 14:09:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:09:18,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:18,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:18,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:18,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:18,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:18,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346918658] [2020-10-13 14:09:18,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:18,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 14:09:18,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927039814] [2020-10-13 14:09:18,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:09:18,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:09:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:09:18,569 INFO L87 Difference]: Start difference. First operand 1977 states and 2934 transitions. Second operand 10 states. [2020-10-13 14:09:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:20,433 INFO L93 Difference]: Finished difference Result 4757 states and 7128 transitions. [2020-10-13 14:09:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:09:20,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-13 14:09:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:20,439 INFO L225 Difference]: With dead ends: 4757 [2020-10-13 14:09:20,439 INFO L226 Difference]: Without dead ends: 2900 [2020-10-13 14:09:20,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-13 14:09:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2020-10-13 14:09:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 1966. [2020-10-13 14:09:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-10-13 14:09:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2920 transitions. [2020-10-13 14:09:20,949 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2920 transitions. Word has length 61 [2020-10-13 14:09:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:20,949 INFO L479 AbstractCegarLoop]: Abstraction has 1966 states and 2920 transitions. [2020-10-13 14:09:20,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:09:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2920 transitions. [2020-10-13 14:09:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 14:09:20,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:20,951 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] [2020-10-13 14:09:20,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:09:20,952 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash 138893268, now seen corresponding path program 1 times [2020-10-13 14:09:20,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:20,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579796358] [2020-10-13 14:09:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:20,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:21,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:22,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:23,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:24,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:24,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:25,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:25,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:25,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:25,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 14:09:25,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:09:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:09:25,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:09:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 14:09:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:09:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:26,147 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:09:26,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:26,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:26,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:26,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:26,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:09:26,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:26,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:26,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:26,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:26,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:09:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:26,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579796358] [2020-10-13 14:09:26,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:26,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:09:26,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140098986] [2020-10-13 14:09:26,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:09:26,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:26,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:09:26,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:26,178 INFO L87 Difference]: Start difference. First operand 1966 states and 2920 transitions. Second operand 4 states. [2020-10-13 14:09:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:27,640 INFO L93 Difference]: Finished difference Result 5458 states and 8154 transitions. [2020-10-13 14:09:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:09:27,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-13 14:09:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:27,647 INFO L225 Difference]: With dead ends: 5458 [2020-10-13 14:09:27,647 INFO L226 Difference]: Without dead ends: 3616 [2020-10-13 14:09:27,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:09:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2020-10-13 14:09:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 3422. [2020-10-13 14:09:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3422 states. [2020-10-13 14:09:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 5056 transitions. [2020-10-13 14:09:28,636 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 5056 transitions. Word has length 79 [2020-10-13 14:09:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:28,637 INFO L479 AbstractCegarLoop]: Abstraction has 3422 states and 5056 transitions. [2020-10-13 14:09:28,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:09:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 5056 transitions. [2020-10-13 14:09:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:09:28,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:28,643 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] [2020-10-13 14:09:28,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:09:28,644 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash 407442872, now seen corresponding path program 1 times [2020-10-13 14:09:28,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:28,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083433080] [2020-10-13 14:09:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:28,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:29,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:32,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:32,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:33,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:09:33,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:09:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:09:33,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:09:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-13 14:09:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:09:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:33,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:33,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:33,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:33,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:33,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:33,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:09:33,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:33,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:33,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083433080] [2020-10-13 14:09:33,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:33,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:09:33,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909379187] [2020-10-13 14:09:33,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:09:33,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:09:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:33,791 INFO L87 Difference]: Start difference. First operand 3422 states and 5056 transitions. Second operand 4 states. [2020-10-13 14:09:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:35,564 INFO L93 Difference]: Finished difference Result 8506 states and 12514 transitions. [2020-10-13 14:09:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:09:35,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-13 14:09:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:35,570 INFO L225 Difference]: With dead ends: 8506 [2020-10-13 14:09:35,570 INFO L226 Difference]: Without dead ends: 5208 [2020-10-13 14:09:35,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2020-10-13 14:09:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 5206. [2020-10-13 14:09:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-10-13 14:09:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 7472 transitions. [2020-10-13 14:09:37,014 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 7472 transitions. Word has length 80 [2020-10-13 14:09:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:37,014 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 7472 transitions. [2020-10-13 14:09:37,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:09:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 7472 transitions. [2020-10-13 14:09:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:09:37,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:37,017 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] [2020-10-13 14:09:37,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:09:37,018 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash -688492659, now seen corresponding path program 1 times [2020-10-13 14:09:37,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:37,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794658760] [2020-10-13 14:09:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:41,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:09:41,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:09:41,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4926 [2020-10-13 14:09:41,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:09:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 14:09:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 14:09:41,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:42,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:42,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:42,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:42,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:42,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:09:42,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:42,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794658760] [2020-10-13 14:09:42,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:42,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:09:42,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944417141] [2020-10-13 14:09:42,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:09:42,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:09:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:09:42,120 INFO L87 Difference]: Start difference. First operand 5206 states and 7472 transitions. Second operand 6 states. [2020-10-13 14:09:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:45,055 INFO L93 Difference]: Finished difference Result 8360 states and 11913 transitions. [2020-10-13 14:09:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:09:45,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-13 14:09:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:45,063 INFO L225 Difference]: With dead ends: 8360 [2020-10-13 14:09:45,064 INFO L226 Difference]: Without dead ends: 8358 [2020-10-13 14:09:45,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:09:45,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2020-10-13 14:09:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 5254. [2020-10-13 14:09:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5254 states. [2020-10-13 14:09:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 7456 transitions. [2020-10-13 14:09:46,490 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 7456 transitions. Word has length 81 [2020-10-13 14:09:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:46,490 INFO L479 AbstractCegarLoop]: Abstraction has 5254 states and 7456 transitions. [2020-10-13 14:09:46,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:09:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 7456 transitions. [2020-10-13 14:09:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:09:46,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:46,493 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] [2020-10-13 14:09:46,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 14:09:46,493 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash 103167505, now seen corresponding path program 1 times [2020-10-13 14:09:46,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:46,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112887110] [2020-10-13 14:09:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:46,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:46,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:47,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:50,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:50,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:50,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:51,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:51,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:09:51,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:09:51,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:09:51,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:09:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 14:09:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:09:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:51,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:51,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:51,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:51,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:51,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:51,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:09:51,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:51,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:51,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:51,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:51,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:51,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112887110] [2020-10-13 14:09:51,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:51,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:09:51,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243849583] [2020-10-13 14:09:51,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:09:51,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:51,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:09:51,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:51,653 INFO L87 Difference]: Start difference. First operand 5254 states and 7456 transitions. Second operand 4 states. [2020-10-13 14:09:51,776 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-13 14:09:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:54,915 INFO L93 Difference]: Finished difference Result 14938 states and 21090 transitions. [2020-10-13 14:09:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:09:54,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:09:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:54,927 INFO L225 Difference]: With dead ends: 14938 [2020-10-13 14:09:54,928 INFO L226 Difference]: Without dead ends: 9808 [2020-10-13 14:09:54,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:09:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9808 states. [2020-10-13 14:09:57,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9808 to 9302. [2020-10-13 14:09:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9302 states. [2020-10-13 14:09:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9302 states to 9302 states and 12976 transitions. [2020-10-13 14:09:57,481 INFO L78 Accepts]: Start accepts. Automaton has 9302 states and 12976 transitions. Word has length 81 [2020-10-13 14:09:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:57,481 INFO L479 AbstractCegarLoop]: Abstraction has 9302 states and 12976 transitions. [2020-10-13 14:09:57,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:09:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9302 states and 12976 transitions. [2020-10-13 14:09:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:09:57,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:57,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:09:57,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 14:09:57,483 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1147150611, now seen corresponding path program 1 times [2020-10-13 14:09:57,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:57,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740459663] [2020-10-13 14:09:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:57,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:57,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:57,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:57,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:57,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:58,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:58,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:58,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:00,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:02,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:02,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:10:02,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:10:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:10:02,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 14:10:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:10:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:02,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:02,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:02,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:02,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:02,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:10:02,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:02,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:02,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740459663] [2020-10-13 14:10:02,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:02,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:02,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015297620] [2020-10-13 14:10:02,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:02,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:02,639 INFO L87 Difference]: Start difference. First operand 9302 states and 12976 transitions. Second operand 4 states. [2020-10-13 14:10:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:08,318 INFO L93 Difference]: Finished difference Result 26506 states and 36642 transitions. [2020-10-13 14:10:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:10:08,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-13 14:10:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:08,334 INFO L225 Difference]: With dead ends: 26506 [2020-10-13 14:10:08,334 INFO L226 Difference]: Without dead ends: 17328 [2020-10-13 14:10:08,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17328 states. [2020-10-13 14:10:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17328 to 16318. [2020-10-13 14:10:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16318 states. [2020-10-13 14:10:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16318 states to 16318 states and 22216 transitions. [2020-10-13 14:10:13,124 INFO L78 Accepts]: Start accepts. Automaton has 16318 states and 22216 transitions. Word has length 82 [2020-10-13 14:10:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:13,124 INFO L479 AbstractCegarLoop]: Abstraction has 16318 states and 22216 transitions. [2020-10-13 14:10:13,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16318 states and 22216 transitions. [2020-10-13 14:10:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:10:13,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:13,126 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] [2020-10-13 14:10:13,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 14:10:13,126 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:13,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:13,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1213722997, now seen corresponding path program 1 times [2020-10-13 14:10:13,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:13,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848867862] [2020-10-13 14:10:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:13,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:14,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:15,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:15,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:18,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:10:18,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:18,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:18,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:18,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:18,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:18,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:10:18,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:18,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:18,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848867862] [2020-10-13 14:10:18,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:18,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:10:18,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600298274] [2020-10-13 14:10:18,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:10:18,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:10:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:18,282 INFO L87 Difference]: Start difference. First operand 16318 states and 22216 transitions. Second operand 5 states. [2020-10-13 14:10:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:23,577 INFO L93 Difference]: Finished difference Result 32554 states and 44348 transitions. [2020-10-13 14:10:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:10:23,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-13 14:10:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:23,592 INFO L225 Difference]: With dead ends: 32554 [2020-10-13 14:10:23,592 INFO L226 Difference]: Without dead ends: 16360 [2020-10-13 14:10:23,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:10:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16360 states. [2020-10-13 14:10:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16360 to 16284. [2020-10-13 14:10:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16284 states. [2020-10-13 14:10:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16284 states to 16284 states and 22178 transitions. [2020-10-13 14:10:28,290 INFO L78 Accepts]: Start accepts. Automaton has 16284 states and 22178 transitions. Word has length 83 [2020-10-13 14:10:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:28,290 INFO L479 AbstractCegarLoop]: Abstraction has 16284 states and 22178 transitions. [2020-10-13 14:10:28,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:10:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16284 states and 22178 transitions. [2020-10-13 14:10:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:10:28,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:28,291 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] [2020-10-13 14:10:28,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 14:10:28,292 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -152022714, now seen corresponding path program 1 times [2020-10-13 14:10:28,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:28,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613344560] [2020-10-13 14:10:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:28,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:28,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:30,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:30,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:31,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:10:31,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:10:31,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3293 [2020-10-13 14:10:31,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:10:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-13 14:10:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:10:31,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:31,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:31,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:31,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:31,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:10:31,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613344560] [2020-10-13 14:10:31,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:31,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:10:31,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605946480] [2020-10-13 14:10:31,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:10:31,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:10:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:10:31,725 INFO L87 Difference]: Start difference. First operand 16284 states and 22178 transitions. Second operand 4 states. [2020-10-13 14:10:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:10:37,564 INFO L93 Difference]: Finished difference Result 33264 states and 45380 transitions. [2020-10-13 14:10:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:10:37,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-13 14:10:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:10:37,582 INFO L225 Difference]: With dead ends: 33264 [2020-10-13 14:10:37,582 INFO L226 Difference]: Without dead ends: 17070 [2020-10-13 14:10:37,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:10:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17070 states. [2020-10-13 14:10:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17070 to 17068. [2020-10-13 14:10:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17068 states. [2020-10-13 14:10:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17068 states to 17068 states and 23074 transitions. [2020-10-13 14:10:42,415 INFO L78 Accepts]: Start accepts. Automaton has 17068 states and 23074 transitions. Word has length 83 [2020-10-13 14:10:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:10:42,415 INFO L479 AbstractCegarLoop]: Abstraction has 17068 states and 23074 transitions. [2020-10-13 14:10:42,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:10:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 17068 states and 23074 transitions. [2020-10-13 14:10:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:10:42,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:10:42,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:10:42,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 14:10:42,420 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:10:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:10:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash -938989935, now seen corresponding path program 1 times [2020-10-13 14:10:42,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:10:42,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462839029] [2020-10-13 14:10:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:10:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:42,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:42,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:42,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:42,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:43,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:43,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:44,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:46,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:47,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:47,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:10:47,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:10:47,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:10:47,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:47,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:10:47,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:10:47,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 14:10:47,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:47,744 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-13 14:10:47,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:10:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:10:47,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:10:47,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:10:47,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:10:47,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:10:47,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:10:47,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:10:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:10:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:10:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:10:47,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:10:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:10:47,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462839029] [2020-10-13 14:10:47,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:10:47,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-13 14:10:47,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536601534] [2020-10-13 14:10:47,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:10:47,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:10:47,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:10:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:10:47,961 INFO L87 Difference]: Start difference. First operand 17068 states and 23074 transitions. Second operand 13 states. [2020-10-13 14:10:48,295 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 123 [2020-10-13 14:11:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:06,361 INFO L93 Difference]: Finished difference Result 68822 states and 92828 transitions. [2020-10-13 14:11:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 14:11:06,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 103 [2020-10-13 14:11:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:06,411 INFO L225 Difference]: With dead ends: 68822 [2020-10-13 14:11:06,411 INFO L226 Difference]: Without dead ends: 51832 [2020-10-13 14:11:06,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:11:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51832 states. [2020-10-13 14:11:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51832 to 17074. [2020-10-13 14:11:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17074 states. [2020-10-13 14:11:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17074 states to 17074 states and 23080 transitions. [2020-10-13 14:11:11,594 INFO L78 Accepts]: Start accepts. Automaton has 17074 states and 23080 transitions. Word has length 103 [2020-10-13 14:11:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:11,594 INFO L479 AbstractCegarLoop]: Abstraction has 17074 states and 23080 transitions. [2020-10-13 14:11:11,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:11:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17074 states and 23080 transitions. [2020-10-13 14:11:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:11:11,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:11,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:11,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 14:11:11,599 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1201092902, now seen corresponding path program 1 times [2020-10-13 14:11:11,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:11,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473913124] [2020-10-13 14:11:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:11,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:11,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:12,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:12,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:13,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking...